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North America

continent

Subtopics:
Canada (13 items)
Mexico (2 items)
United States (1171 items)
U.S. possessions and associated areas (31 items)

Results 1 - 1142 of 1194 listed alphabetically [list by similarity]

1999 resource assessment of selected Tertiary coal beds and zones in the northern Rocky Mountains and Great Plains region. [More info]: Coal resources, stratigraphy, geochemistry, coal quality and geology of Tertiary coal beds and zones in the northern Rocky Mountains and Great Plains regions. Text in PDF format and available on CD-ROM.
2008 High-Flow Experiment at Glen Canyon Dam Benefits Colorado River Resources in Grand Canyon National Park [More info]: Scientists studied whether high flows could be used to rebuild sandbars, create nearshore habitat for the endangered humpback chub, and help other resources such as archaeological sites, rainbow trout, aquatic food availability, and riverside vegetation.
2010 updated assessment of undiscovered oil and gas resources of the National Petroleum Reserve in Alaska (NPRA) [More info]: We estimate mean volumes of 896 million barrels of oil and about 53 trillion cubic feet of nonassociated natural gas in conventional, undiscovered accumulations within this area, a reduction of our 2002 estimate due to new geologic information.
30 cool facts about Mount St. Helens [More info]: Poster commemorating the 30th anniversary of the 1980 eruptions of Mount St. Helens, a volcano in southwestern Washington state. Facts provided in plain text as well.
A Magnitude 7.1 Earthquake in the Tacoma Fault Zone-A Plausible Scenario for the Southern Puget Sound Region, Washington [More info]: Scientific description of the likely effects of a significant earthquake on this densely populated area.
A Neotropical Migrant Bird's Dilemma - Where to Stop for a Good Meal [More info]: Studying 28 species of warblers, flycatchers, tanagers, and vireos, we find the birds relied on the flowering of honey mesquite to detect the availability of insects they eat.
A dryland river transformed--the Little Colorado, 1936-2010 [More info]: We mapped substantial migration of the river channel between the City of Winslow and the Navajo Nation community of Leupp; in a human lifetime the river has moved more than a mile across its valley floor.
A new tool to assess groundwater resources in the Mississippi embayment [More info]: Mathematical model of the groundwater system in this area includes 13 types of data and spans multiple aquifers over more than a century. This enables us to assess the quantity of groundwater, where and how it is being used, and how pumping affects it.
A promising tool for subsurface permafrost mapping-An application of airborne geophysics from the Yukon River Basin, Alaska [More info]: Airborne electromagnetic surveying is used to estimate the character of the permafrost by measuring and monitoring the electrical resistivity, which is affected by lithology, temperature, water, and ice.
A spatial analysis of cultural ecosystem service valuation by regional stakeholders in Florida: a coastal application of the social values for ecosystem services (SolVES) tool [More info]: Research project to close gaps in our knowledge about the attitudes and perceptions, or nonmonetary values, held by coastal residents for ecosystem services, particularly for cultural services.
A volcano rekindled; the renewed eruption of Mount St. Helens, 2004-2006 [More info]
Access USGS - San Francisco Bay and Delta [More info]: Main page for accessing links for information and data on the San Francisco Bay estuary and its watershed with links to highlights, water, biology, wetlands, hazards, digital maps, geologic mapping, winds, bathymetry and overview of the Bay.
Acid Rain in Shenandoah National Park, Virginia [More info]: Explains acidity and acid rain and how it affects aquatic organisms. Describes the effect of acid rain on this national park, identifying areas that are at greater or lesser risk from acid rain.
Acid rain and our Nation's Capital [More info]: Describes noticeable effects of acid rain on the building stones and monuments in Washington, DC.
Acid rain effects on Adirondack streams - results from the 2003-05 western Adirondack stream survey (the WASS Project) [More info]: Acidified soils caused toxic aluminum in 66 percent of 565 assessed streams. Diatoms and aquatic macroinvertebrates were moderately to severely affected. These effects have not improved in areas surveyed in the early 1980s
Alabama Water Use, 2005 [More info]: Detailed information about how water is used in Alabama by type of use and geographic area.
Alaska Geospatial Data Clearinghouse [More info]: Clearinghouse for the description and availability of multiple geospatial datasets relating to Alaska from many federal, state and local cooperating agencies under the coordination of the Alaska Geographic Data Committee.
Alaska Interagency Ecosystem Health Work Group [More info]: A community of practice that recognizes the interconnections between the health of ecosystems, wildlife, and humans and meets to facilitate the exchange of ideas, data, and research opportunities.
Alaska Resource Data Files [More info]: Downloadable descriptions of mines, prospects, and mineral occurrences for individual U.S. Geological Survey 1:250,000-scale quadrangles in Alaska.
Alaska Science Center - Biological Science Office [More info]: Research on birds, mammals, ecosystems and habitats, fish and fisheries in Alaska
Alaska Volcano Observatory [More info]: Homepage for Alaska Volcano Observatory (AVO) with offices in Anchorage and Fairbanks monitors and studies Alaska's hazardous volcanoes. Links to featured news, updates, publications and products, and a volcano atlas for Alaska.
Alaska mineral resources [More info]: Reports, data, and current research on mineral resources in Alaska
Alaska petroleum resources [More info]: Information on Alaskan energy resources in oil, petroleum, and natural gas with links to publications and other research.
Alaska volcanoes guidebook for teachers [More info]: The lessons and activities in this guidebook are meant to supplement and enhance existing science content already being taught to Alaskan students in grade levels 6-12.
Amargosa Desert research site [More info]: Online reports, site description and photographs of the Amargosa Desert research site monitoring low level radioactive waste.
America's volcanic past - volcanic highlights and features [More info]: Links to volcanism, volcanic history, volcanic rocks, and general geology by state, by region, national parks and national monuments and a brief introduction to volcanism around the U.S. entitled: Windows into the past.
Amphibian monitoring in the Atchafalaya Basin [More info]: They're abundant in this area, but hard to count reliably. We outline a procedure for estimating the population sizes so that we can determine whether they're increasing or dwindling. We must both listen for their calls and visually confirm them.
Amphibians & reptiles of the southeastern United States and the U.S. Virgin Islands [More info]: Links to information on species of frogs, toads, and salamanders located in the southeastern United States and the U.S. Virgin Islands, with information on appearance, habitats, calls, and status, plus photos, glossary, and provisional data.
Amphibians of Olympic National Park [More info]: Fact sheet (PDF format) on amphibians in Olympic National Park and overview of the habitat, the decline in populations, and rare amphibians in the Pacific Northwest including the giant salamander and tailed frog.
An Overview of Historical Channel Adjustment and Selected Hydraulic Values in the Lower Sabine and Lower Brazos River Basins, Texas and Louisiana [More info]: How has the channel shape and path changed in response to reservoirs and other human disturbances affecting the streamflow?
An experiment to control nonnative fish in the Colorado River, Grand Canyon, Arizona [More info]: We removed non-native fish from a section of the river and the endangered native species humpback chub increased in abundance. But it is not yet clear that decreased competition explains the rebound in population.
An interpretation of the 1977 Airborne Electromagnetic (AEM) survey, Fort Huachuca vicinity, Cochise County, Arizona [More info]: Complex report on the interpretation of aeromagnetic data to study hydrogeology of the San Pedro basin, Cochise County, Arizona determining geologic structure, basin fill and depth to water. Online version of a CD-ROM publication.
An online database for IHN virus in Pacific Salmonid fish: MEAP-IHNV [More info]: Background information and genetic sequencing data for more than 1,000 individual field isolates of the fish virus Infectious Hematopoietic Necrosis Virus (IHNV) collected in western North America from 1966 to the present, updated annually.
Analyzing land use change in urban environments [More info]: Describes the USGS Urban Dynamics Research Program that studies landscape changes resulting from the growth of metropolitan regions over time.
Annual hydrologic data report of Pennsylvania [More info]: Online annual reports (since 1999) documenting hydrologic data for Pennsylvania gathered from USGS surface water and ground water data-collection networks and information on ordering paper copies of previous years.
Annual peak streamflow and ancillary data for small watersheds in central and western Texas [More info]: Estimates of annual peak-streamflow frequency are needed for flood-plain management, assessment of flood risk, and design of structures, such as roads, bridges, culverts, dams, and levees.
Anticipated effects of development on habitat fragmentation and movement of mammals into and out of the Schoodic District, Acadia National Park, Maine [More info]: Wildlife you see in a national park or other reserved area don't know about the park boundary. Bobcat, martens, mink, and moose need different types of living space and habitat. Development outside the park affects their ability to inhabit the park.
Application of the SPARROW watershed model to describe nutrient sources and transport in the Missouri River Basin [More info]: Maps and diagrams showing how the mathematical model predicts the distribution of various pollutants within a large watershed.
Aquatic features, bathymetry, and navigation structures in the upper Mississippi River [More info]: Geospatial hydrologic and reference data covering the upper Mississippi River, provided in formats appropriate to geographic information systems (GIS) and used in long-term resource monitoring of the area.
Aquifer basics [More info]: Links to general information on water supply by aquifers based on rock types and to principal national aquifers by name.
Arctic National Wildlife Refuge, 1002 Area, petroleum assessment, 1998, including economic analysis [More info]: Arctic National Wildlife Refuge (ANWR) 1002 area's petroleum resource assessment. Text available in PDF and HTML formats.
Arctic Refuge coastal plain terrestrial wildlife research summaries [More info]: Updated summaries of research in the Arctic National Wildlife Refuge, Alaska, on caribou, muskoxen, predators (grizzly bears, wolves, golden eagles), polar bears, snow geese and their wildlife habitats with maps of land-cover and vegetation.
Arsenic in ground water of the United States [More info]: Information on arsenic in United States ground water largely as a result of minerals dissolving from weathered rocks and soils. Includes links to publications, data, maps, and links to other sites with information on arsenic.
Arsenic in ground water of the United States [More info]: Arsenic is a naturally occurring element in rocks, soils, and the waters in contact with them. It is found in ground water as the result of minerals dissolving from weathered rocks and soils. This site links to data, maps, and more.
Assessing Groundwater Availability in the High Plains Aquifer in Parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming [More info]: Explains concepts and methods used to determine the likely future supply of usable water in this major aquifer.
Assessing effects of energy development in Colorado and New Mexico [More info]: Outlines information needed to enable effective local decision making regarding the installation, siting, and effects of energy resource facilities.
Assessing groundwater availability in the North Atlantic Coastal Plain aquifer system [More info]: Nature, history, and distinctive characteristics of this aquifer system help us to understand the likely distribution of available groundwater.
Assessing the Vulnerability of Public-Supply Wells to Contamination: Central Valley Aquifer System near Modesto, California [More info]: Using ground-water geochemical analyses, and mathematical models, the factors affecting the quality of public water supply were identified as pumping schedule, screened interval, past land use within the recharge area, and natural geochemical conditions.
Assessing the Vulnerability of Public-Supply Wells to Contamination: Floridan Aquifer System Near Tampa, Florida [More info]: Using ground-water geochemical analyses and mathematical models, the factors affecting the quality of public water supply were identified as mixing of very recent recharge with older water, karst features, natural geochemical processes, and pumping.
Assessing the Vulnerability of Public-Supply Wells to Contamination: Glacial Aquifer System in Woodbury, Connecticut [More info]: Sources and effects of contamination surrounding a single well in western Connecticut
Assessing the impact of urban sprawl on soil resources in the United States using nighttime "city lights" satellite images and digital soils maps [More info]: Paper from Land Use History of North America giving results of a study to estimate the extent of developed land in the United States and the impact of development on soil resources.
Assessing the vulnerability of public-supply wells to contamination--Edwards aquifer near San Antonio, Texas [More info]: Well vulnerability results from the young age of groundwater. Karst features permit contaminants to move into the aquifer easily, leading to a well mixed aquifer; geochemical processes do not degrade contaminants quickly.
Assessing the vulnerability of public-supply wells to contamination: Rio Grande aquifer system in Albuquerque, New Mexico [More info]: Explains the natural and human-affected factors that determine the concentration of contaminants in groundwater, especially where the concentration is different at the surface than at depth, and where pumping varies with time.
Assessment of Contaminant Exposure and Effects on Ospreys Nesting along the Lower Duwamish River, Washington, 2006-07 [More info]
Assessment of Gas Hydrate Resources on the North Slope, Alaska, 2008 [More info]: We estimate that there are about 85 trillion cubic feet (TCF) of undiscovered, technically recoverable gas resources within gas hydrates in northern Alaska.
Assessment of In-Place Oil Shale Resources of the Green River Formation, Piceance Basin, Western Colorado [More info]: We estimated a total of 1.525 trillion barrels of oil are in place in seventeen oil shale zones in this area using a geology-based assessment methodology.
Assessment of In-Place Oil Shale Resources of the Green River Formation, Uinta Basin, Utah and Colorado [More info]: Using a geology-based assessment methodology, we estimated a total of 1.32 trillion barrels of oil in place in eighteen oil shale zones in this Eocene geologic unit.
Assessment of Moderate- and High-Temperature Geothermal Resources of the United States [More info]: The electric power generation potential from identified geothermal systems is 9,057 Megawattselectric (MWe), distributed over 13 states. Undiscovered resources are estimated to provide an additional 30,033 MWe.
Assessment of Undiscovered Biogenic Gas Resources, North-Central Montana Province [More info]: We estimated 6,192 billion cubic feet of shallow biogenic (continuous) undiscovered gas in this area using a geology-based assessment methodology.
Assessment of Undiscovered Hydrocarbon Resources of the Western Oregon and Washington Province [More info]: We estimated mean volumes of 2.2 trillion cubic feet (TCF) of undiscovered natural gas and 15 million barrels of oil (MMBO) in the using a geology-based assessment methodology.
Assessment of Undiscovered Natural Gas Resources of the Arkoma Basin Province and Geologically Related Areas [More info]: We estimated mean volumes of 38 trillion cubic feet (TCF) of undiscovered natural gas, 159 million barrels of natural gas liquid (MMBNGL), and no oil in accumulations of 0.5 million barrels (MMBO) or larger in this area.
Assessment of Undiscovered Natural Gas Resources of the Sacramento Basin Province of California, 2006 [More info]: We estimated undiscovered, technically recoverable resources are 534 billion cubic feet of natural gas and 323 thousand barrels of natural gas liquids in this area using a geology-based assessment methodology.
Assessment of Undiscovered Oil Resources in the Devonian-Mississippian Bakken Formation, Williston Basin Province, Montana and North Dakota, 2008 [More info]: We estimated mean undiscovered volumes of 3.65 billion barrels of oil, 1.85 trillion cubic feet of associated dissolved natural gas, and 148 million barrels of natural gas liquids in this area using a geology-based assessment methodology.
Assessment of Undiscovered Oil and Gas Resources in Cretaceous-Tertiary Coal Beds of the Gulf Coast Region, 2007 [More info]: We estimated a mean of 4.06 trillion cubic feet of undiscovered, technically recoverable natural gas in these coal beds of the onshore lands and State waters of the Gulf Coast.
Assessment of Undiscovered Oil and Gas Resources in Tertiary Strata of the Gulf Coast, 2007 [More info]: We estimated mean undiscovered resources of 113.7 trillion cubic feet of natural gas, a mean of 690 million barrels of oil, and a mean of 3.7 billion barrels of natural gas liquids in onshore lands and state waters in this area.
Assessment of Undiscovered Oil and Gas Resources of the Bighorn Basin Province, Wyoming and Montana, 2008 [More info]: We estimated a mean of 989 billion cubic feet of undiscovered natural gas, a mean of 72 million barrels of undiscovered oil, and a mean of 13 million barrels of undiscovered natural gas liquids in this area.
Assessment of Undiscovered Oil and Gas Resources of the Permian Basin Province of West Texas and Southeast New Mexico, 2007 [More info]: We estimated a mean of 41 trillion cubic feet of undiscovered natural gas and a mean of 1.3 billion barrels of undiscovered oil in this area using a geology-based assessment methodology.
Assessment of Undiscovered Oil and Gas Resources of the Williston Basin Province of North Dakota, Montana, and South Dakota, 2008 [More info]: We estimated mean undiscovered volumes of 3.8 billion barrels of undiscovered oil, 3.7 trillion cubic feet of associated/dissolved natural gas, and 0.2 billion barrels of undiscovered natural gas liquids using a geology-based assesment methodology.
Assessment of aquatic macroinvertebrate communities in the Autauga Creek watershed, Autauga County, Alabama, 2009 [More info]: Previous analysis showed this area to have reduced macroinvertebrate biodiversity, an important measure of ecosystem health. New observations indicate that conditions have improved; report includes methods and results of sampling.
Assessment of coal geology, resources, and reserve base in the Powder River Basin, Wyoming and Montana [More info]: We estimated in-place resources of 1.07 trillion short tons of coal in this area using a geology-based assessment methodology. Of that total, recoverable coal was 162 billion tons, 25 billion economically recoverable.
Assessment of in-place oil shale resources of the Green River Formation, Greater Green River Basin in Wyoming, Colorado, and Utah [More info]: Using the Fischer assay measure of oil yield, we estimated a total of 1.44 trillion barrels of oil in three assessed units. There is currently no economic method to recover oil from this geologic unit.
Assessment of least tern and piping plover habitats on the Missouri River using remote sensing [More info]: Analysis and modeling of multispectral imagery helps to predict the suitability of sand bars for nesting of these migratory birds.
Assessment of potential coastal impacts: Hurricane Rita [More info]: Areas susceptible to inundation during landfall of Hurricane Rita are assessed by comparing lidar-derived dune elevations to simulated storm surge values. Results shown on pictorial maps.
Assessment of potential oil and gas resources in source rocks of the Alaska North Slope, 2012 [More info]: We estimated potential, technically recoverable oil and gas resources for source rocks of the Alaska North Slope. Estimates range from zero to 2 billion barrels of oil and from zero to nearly 80 trillion cubic feet of natural gas.
Assessment of remaining recoverable oil in selected major oil fields of the Permian Basin, Texas and New Mexico [More info]: The mean total volume of potential additional oil resources that might be added using improved oil-recovery technologies was estimated to be about 2.7 billion barrels of oil.
Assessment of remaining recoverable oil in selected major oil fields of the San Joaquin Basin, California [More info]: The mean total volume of potential oil reserves that might be added in the nine fields using improved oil-recovery technologies was estimated to be about 6.5 billion barrels of oil.
Assessment of undiscovered conventional oil and gas resources of the Western Canadian Sedimentary Basin, Canada, 2012 [More info]: We estimated undiscovered resources of 1,321 million barrels of oil, 25,386 billion cubic feet of gas, and 604 million barrels of natural gas liquids in this area using a geology based assessment methodology.
Assessment of undiscovered oil and gas resources in Jurassic and Cretaceous strata of the Gulf Coast, 2010 [More info]: We estimated means of 147.4 trillion cubic feet of undiscovered natural gas, 2.4 billion barrels of undiscovered oil, and 2.96 billion barrels of undiscovered natural gas liquids in this area using a geology-based assessment methodology.
Assessment of undiscovered oil and gas resources in conventional and continuous petroleum systems in the Upper Cretaceous Eagle Ford Group, U.S. Gulf Coast region, 2011 [More info]: We estimated the volume of oil, natural gas, and natural gas liquids in three closely related geologic units in this area using a geology based assessment methodology.
Assessment of undiscovered oil and gas resources of the Anadarko Basin Province of Oklahoma, Kansas, Texas, and Colorado, 2010 [More info]: We estimated mean technically-recoverable undiscovered continuous and conventional resources that total 495 million barrels of oil, 27.5 trillion cubic feet of natural gas, and 410 million barrels of natural gas liquids in this area.
Assessment of undiscovered oil and gas resources of the Devonian Marcellus Shale of the Appalachian Basin Province [More info]: We estimated a mean undiscovered natural gas resource of 84,198 billion cubic feet and a mean undiscovered natural gas liquids resource of 3,379 million barrels using a geology-based assessment methodology.
Assessment of undiscovered oil and gas resources of the East Coast Mesozoic basins of the Piedmont, Blue Ridge Thrust Belt, Atlantic Coastal Plain, and New England Provinces, 2011 [More info]: We estimated 3,850 billion cubic feet of natural gas, 135 million barrels of natural gas liquids in this area using a geology-based assessment methodology.
Assessment of undiscovered oil and gas resources of the Illinois Basin, 2007 [More info]: We estimated a mean of 214 million barrels of oil, 4.65 trillion cubic feet of natural gas, and 24 million barrels of natural gas liquids in this area using a geology-based assessment methodology.
Assessment of undiscovered oil and gas resources of the Ordovician Utica Shale of the Appalachian Basin Province, 2012 [More info]: We estimated means of 940 million barrels of oil, 38.2 trillion cubic feet of gas, and 208 million barrels of natural gas liquids in these units using a geology based assessment methodology.
Assessment of undiscovered oil resources in the Bakken and Three Forks Formations, Williston Basin Province, Montana, North Dakota, and South Dakota, 2013 [More info]: We estimated mean undiscovered volumes of 7.4 billion barrels of oil, 6.7 trillion cubic feet of associated/dissolved natural gas, and 0.53 billion barrels of natural gas liquids in this area using a geology-based assessment methodology.
Assessment of undiscovered, conventional oil and gas resources of Mexico, Guatemala, and Belize, 2012 [More info]: We estimated means of 19 billion barrels of oil and 83 trillion cubic feet of undiscovered natural gas resources in 10 geologic provinces of this area using a geology-based assessment methodology.
Atchafalaya & Mississippi River Deltas study: a tale of two deltas [More info]: Project of the Gulf of Mexico Integrated Science program that evaluates the transport and sedimentation of contaminates through the Mississippi River and Atchafalaya River delta to the near-shore Gulf of Mexico. Includes aerial photographs.
Atlas of the spawning and nursery areas of Great Lakes fishes [More info]: Atlas recording spawning and nursery areas of fish in the Great Lakes and associated rivers listed by area and then by species. A 14-volume atlas in PDF format. Published in 1982 by the U.S. Fish and Wildlife Service.
Availability of Groundwater Data for California, Water Year 2008 [More info]: Summary showing number of wells in each county for which water level measurements are available, with description of methodology and well numbering system.
Availability of groundwater data for California, water year 2010 [More info]: Map of California showing the number of wells (by county) with available water-level or water-quality data for Water Year 2010, with descriptions of the data and instructions for obtaining them.
Avian Influenza: Information and on-going research at the USGS Alaska Science Center [More info]: Maps and information about potential spread of avian influenza in migratory birds in Alaska. Includes descriptions and photos of the waterfowl that are being monitored.
Avian conservation in the Prairie Pothole Region, Northern Great Plains-Understanding the links between climate, ecosystem processes, wetland management, and bird communities [More info]: Small wetlands in this large area have hosted migratory birds for a long time, but with changes in agricultural practice and regional climate those habitats may not remain hospitable to the wild populations.
BRASS: Bedrock Regional Aquifer Systematics Study [More info]: Description of the project to publish new bedrock geologic maps in the United States to advance the understanding of the region's bedrock aquifers. Includes list of projects.
Bats of Ouray National Wildlife Refuge [More info]: Detailed information on capture-and-release surveying as well as acoustic monitoring of bats indicates prevalence of various species and, for the captured specimens, physiological characteristics.
Bedrock and soil geochemistry from Voyageurs National Park, Minnesota [More info]: Maps and text (Word or PDF format) and database (Excel or HTML format) for bedrock, forest floor, and mineral soil sampling in Voyageurs National Park, Minnesota to establish the background and baseline geochemistry and terrestrial mercury sources.
Bedrock geologic map of Vermont [More info]: At a scale of 1:100,000, this map shows an uncommon level of detail for State geologic maps. Mapped rock units are primarily based on lithology, or rock type, to facilitate derivative studies in multiple disciplines.
Bedrock geology of the Yosemite Valley area Yosemite National Park, California [More info]: Site explains the general bedrock geology of the Yosemite Valley area.
Bemidji Project crude-oil research project: background information [More info]: The study of petroleum in both the saturated and unsaturated zones, to better understand the processes that control contaminant behavior, and to use this understanding to estimate the future behavior of the contaminants.
Bemidji crude-oil research project (toxic substances) [More info]: Home page contains information, data, maps, and images relating to hydrologic research that has been conducted at the Bemidji research site.
Benchmark glaciers [More info]: Summary of the USGS benchmark glacier program to intensively monitor climate, glacier motion, glacier mass balance, glacier geometry, and stream runoff at three glacier basins, Gulkana and Wolverine in Alaska and South Cascade in Washington.
Beyond the Golden Gate--oceanography, geology, biology, and environmental issues in the Gulf of the Farallones [More info]: A geologic and oceanographic study of the waters and Continental Shelf of Gulf of the Farallones adjacent to the San Francisco Bay region. The results of the study provide a scientific basis to evaluate and monitor human impact on the marine environment.
Bibliography of reports by U.S. Geological Survey authors about the water resources of Wyoming [More info]: Bibliography arranged by major areas and by reports series. Current as of 2007. Also available in PDF format.
Biodiversity and land-use history of the Palouse bioregion: pre-European to present [More info]: Study of the processes by which the conversion occurred of the Palouse bioregion from perennial native grass, shrub, and forest vegetation to agriculture and the interactions between human cultures and environment.
Biogeochemical and geohydrologic processes in a landfill-impacted alluvial aquifer, Norman, Oklahoma [More info]: Discussion and links to research for the multi-disciplinary investigation on the Norman Landfill located on alluvium associated with the Canadian River in central Oklahoma.
Biomarker Benchmarks: Reproductive and Endocrine Biomarkers in Largemouth Bass and Common Carp from United States Waters [More info]: Describes a national reconnaissance study of reproductive health in two species of fish across the US. More than 2,200 common carp and 650 largemouth bass were collected at 119 rivers and streams.
Bird checklists of the United States [More info]: Geographical access to multiple bird checklists developed by others that indicate the seasonal occurrence of birds in a given area. A Record Documentation Form to document supporting details of rare bird observations is also available.
Boiling water at Hot Creek - The dangerous and dynamic thermal springs in California's Long Valley Caldera [More info]: Explains how these hot surface waters form, why their temperature changes often, and provides safety guidance for visiting this area.
Boston Harbor Studies: the fate of sediments and contaminants in Massachusetts Bay [More info]: Boston Harbor/Massachusetts Bay Studies research project conducted as part of Boston Harbor cleanup to predict the fate of contaminants and sediments introduced to Massachusetts' coastal waters from sources that include Boston sewage outfall.
Boston Harbor ecosystems [More info]: This web site is an outgrowth of an agreement between the USGS and the New England Aquarium, designed to summarize and make available results of scientific research. It will also present educational material of interest to wide audiences.
Breccia-pipe uranium mining in northern Arizona; estimate of resources and assessment of historical effects [More info]: Estimates of uranium resources affected by land withdrawal, effects of previous breccia-pipe mining, water-chemistry data for streams and springs, and potential biological pathways of exposure to uranium and associated contaminants.
Bryophytes and lichens, small but indispensable forest dwellers [More info]: Description of bryophytes (mosses, liverworts, and hornworts) and lichens (dual organisms of a fungus and an alga or a cyanobacterium) that are part of forest ecosystems in the Pacific Northwest with information on habitat and conservation.
Buck Island Reef National Monument Sea Turtle Research Program: Sea turtle nesting research & monitoring protocols manual [More info]: Manual for research program on the nesting habits of sea turtles of the Virgin Islands, with descriptions of species, nesting behavior, observation methods, record keeping, tagging, and tissue sample collection. (PDF file, 121 pp.)
Burrowing owls winter in south Texas [More info]: Experimental use of artificial burrows in south Texas to help in conservation of the migratory burrowing owls (Athene cunicularia) that breed in dry grasslands using animal burrows.
Butterflies and moths of North America [More info]: Information on species of butterflies in North America with photos, checklists, distribution maps, aids to identification, and references.
California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project--shallow aquifer assessment [More info]: Explains why we are assessing water quality in shallow aquifers, what we are measuring, and how the results will be reported both to well owners and to the public.
California Water-Quality Assessment [More info]: Results of activities in California conducted under the National Water-Quality Assessment Program (NAWQA): maps, publications and data.
California's BAY-DELTA: USGS Science Supports Decision Making [More info]: What causes changes in the hydrology, the ecology and the water quality of the Sacramento-San Joaquin River Delta and the San Francisco Bay estuary? These studies help state and local agencies manage resources well.
California's Central Valley Groundwater Study: A Powerful New Tool to Assess Water Resources in California's Central Valley [More info]: Modeling effort that integrates a wide variety of geographic, hydrologic, agricultural, climatic, and biological information to help local land managers address resource use issues.
Canoeing North Dakota rivers [More info]: Links to streamflow, stage, pictures, maps, river descriptions, and general information for canoeing on North Dakota's rivers. Files are in PDF format.
Carbon dioxide and helium discharge from Mammoth Mountain, Long Valley caldera, California [More info]: An explanation of toxic carbon dioxide emissions at Mammoth Mountain in Long Valley caldera, and a description of magmatic helium discharge at the Mammoth Mountain fumarole with photos, maps, and links to other studies.
Carolina slate belt gold deposits in Virginia, North Carolina, South Carolina, and Georgia [More info]: Report of research on the Carolina slate belt and gold deposits in Virginia, North Carolina, South Carolina, and Georgia with geologic mapping, mineralogic, geochemical, and fluid evolution studies, radiogenic dating, and stable isotope studies.
Cascades Volcano Observatory - Learn about volcanoes [More info]: Educational volcano site providing answers to frequently asked volcano questions with links to other general information on volcanoes and to information on specific volcanoes including the Cascade Range volcanoes.
Cascades Volcano Observatory - Mount St. Helens real-time hydrologic monitoring [More info]: Real-time and historic data from gaging stations for water and mudflow detection in the Mount St. Helens, WA vicinity with data tables and plots, interactive location map and station descriptions.
Cascadia subduction zone: two contrasting models of lithospheric structure [More info]: Summary of an investigation of the Cascadia subduction zone with detailed density-modeling experiments of the crust and mantle along two transects across Vancouver Island and the Canadian margin and the other on the margin of central Oregon.
Catalogue of Polar Bear (Ursus maritimus) Maternal Den Locations in the Beaufort Sea and Neighboring Regions, Alaska, 1910-2010 [More info]: Approximate locations of 392 polar bear maternal dens found between 1910 and 2010, along with the method and year of discovery.
Central California /San Francisco Bay Earthquake Hazards Project [More info]: Information on earthquakes in central California and the San Francisco region with links to four types of field studies, deep seismic investigations, geotechnical investigations, shallow seismic imaging, and airborne geophysical surveys.
Central Colorado Assessment Project - application of integrated geologic, geochemical, biologic, and mineral resource studies [More info]: Diverse geoscientific and biological data collected in anticipation of ecological, land-management, and mineral resource-related problems.
Changes in Water Levels and Storage in the High Plains Aquifer, Predevelopment to 2007 [More info]: Summarizes changes in water levels and drainable water in storage in the High Plains aquifer from predevelopment (before about 1950) to 2007.
Changes in water levels and storage in the High Plains Aquifer, predevelopment to 2009 [More info]: Summarizes graphically the areas where water levels have dropped, and by how much, in this extensive underground water reservoir that covers several states in the mid-continent.
Changing Arctic Ecosystems-Measuring and forecasting the response of Alaska's terrestrial ecosystem to a warming climate [More info]: Combining genetic data with current and predicted climate scenarios, we are modeling the predicted future distributions of wildlife populations in the Arctic and identifying key environmental variables that determine important animal habitat.
Changing Arctic ecosystems-Research to understand and project changes in marine and terrestrial ecosystems of the Arctic [More info]: Three themes of ongoing research: forecasting polar bear and walrus population response to changing marine ecosystems; measuring wildlife population changes in the Arctic coastal plain, and wildlife communities in the boreal-Arctic transition zone.
Changing patterns in the number of species in North American floras [More info]: A chapter of the publication: Land Use History of North America on general patterns of plant species diversity in North America that shows how these patterns have changed over time.
Characterization of Fish Creek, Teton County, Wyoming, 2004-08 [More info]: Preliminary results of hydrologic and biological sampling confirm anecdotal reports that this stream shows unusually high algal growth due to elevated nutrients, probably from groundwater.
Characterizing contaminant concentrations with depth by using the USGS well profiler in Oklahoma, 2003-9 [More info]: Use of specialized sampling equipment to study public water supply wells, with examples showing Arsenic in two aquifers.
Chesapeake Bay activities [More info]: Information on USGS studies of Chesapeake Bay, the nation's largest estuary, concerned with water quality, ecosystem history and change, vital habitat and biological resources, and land use studies.
Chloride control and monitoring program in the Wichita River Basin, Texas, 1996-2009 [More info]: Chloride concentrations in this river have historically been high due to natural saltwater springs and seeps from geologic formations. We monitor the water to help assess the progress of human efforts designed to mitigate this problematic salinity.
Classification of natural ponds and lakes in the glaciated prairie region [More info]: Presents a wetland classification system that reflects seasonal, regional, and local variations in the environment.
Classification of wetlands and deepwater habitats of the United States [More info]: Detailed publication on the classification system for an inventory of wetlands and deepwater habitats of the United States used to describe ecological taxa and arrange them in a system useful to resource managers.
Climate change in mountain ecosystems [More info]: Overview of interdisciplinary research studies in Glacier National Park to understand how this mountain wilderness responds to present climatic variability and other external stressors, such as air pollution, and links to detailed reports.
Climate of North Dakota: blizzards [More info]: Reviews the causes and frequency of blizzards in North Dakota.
Climate of North Dakota: severe storms [More info]: Reviews frequency and distribution of tornadoes, windstorms, and hailstorms in North Dakota.
Climate-Driven Ocean Changes Affect Estuaries [More info]: Research findings and examples of application to real problems--Pacific Ocean cooling triggers phytoplankton blooms in San Francisco Bay.
Climatic changes and effect on wild sheep habitat [More info]: Preliminary results indicate significant changes in Dall sheep diet accompanying vegetation changes and upslope retreat of glaciers.
Coal database for Cook Inlet and North Slope, Alaska [More info]: Published and nonconfidential unpublished coal data from wells in Alaska. Includes well locations, depth and thickness of coal in well, formation type and name, and business administrative information such as permit numbers.
Coal on federal lands [More info]: Information on coal on federally owned public lands with links to database and maps for federal coal ownership of the United States, Rocky Mountains and Great Plains, and Colorado Plateau.
Coal-bed gas resources of the Rocky Mountain region [More info]: Summary of the technically recoverable coal-bed gas resources of the Rocky Mountain region.
Coal-bed methane: potential and concerns [More info]: Fact sheet in PDF format on occurrence and recoverability of coalbed methane in the U.S. and related environmental concerns.
Coalbed methane studies [More info]: Methane (natural gas), while frequently developed with petroleum, also occurs in association with coal and accounts for about 7.5 percent of U.S. natural gas production. Links to digital publications on coalbed methane.
Coastal Change During Hurricane Dennis 2005 [More info]: Summary of study to document the impact of Hurricane Dennis on Santa Rosa Island, in the Florida Panhandle.
Coastal Change During Hurricane Isabel 2003 [More info]: Summary of study to document the impact of Hurricane Isabel in the Outer Banks of North Carolina, near Cape Hatteras. Methods included pre- and post-storm photography, videography, and lidar.
Coastal and Marine Geology Program interactive map server [More info]: Interactive map server to view and create maps using available coastal and marine geology data sets of offshore and coastal U.S. and the Gulf of Mexico. Links to available data and metadata that can be downloaded.
Coastal change during Hurricane Ivan 2004 [More info]: Summary of study to document the impact of Hurricane Ivan on the Gulf coast of Alabama near the Florida border.
Coastal ecosystem responses to influences from land and sea, coastal and ocean science [More info]: Changes in both the ocean and coastal ecosystems may have negative effects on sea otter populations in the coastal Northwest and Alaska. A study underway will examine these factors and the overall health of sea otter populations.
Coastal habitats in Puget Sound [More info]: Declines in fish and wildlife populations, water-quality issues, and changes in coastal habitats have prompted this USGS study of the region's nearshore life and environment. Includes links to data from published reports.
Coastal ocean modeling at the USGS Woods Hole Field Center [More info]: Fly-by and circulation movies, effluent concentration, tidal flushing, sea level, and temperature in Massachusetts Bay and Boston Harbor
Columbia Environmental Research Center [More info]: Website for the Columbia Environmental Research Center with links to staff, publications, databases, field stations, and projects including those on the Rio Grande, burrowing owls, sea turtles, and geospatial technology.
Columbia Environmental Research Center (CERC) Ecology Branch [More info]: Overview of research of the Ecology Branch on the ecological consequences of habitat degradation due to altered environment, nonindigenous species, and atmospheric alterations. Includes links to staff and research projects.
Columbia River USGS Interdisciplinary Science Explorer WebSite [More info]: Web site for an Internet Map Service (IMS) serving base cartographic data, USGS data, science applications and real time modelling analyses for the Columbia River basin using geospatial analysis technology.
Concentrations of mercury and other metals in black bass (Micropterus spp.) from Whiskeytown Lake, Shasta County, California, 2005 [More info]: Historical gold mining has left this area susceptible to mercury contamination. Elevated concentrations of mercury in the fish are well documented here.
Condition of streams in Independence, Missouri: What is being done to protect stream health and how citizens can help [More info]: Stream water quality is affected by amount of impermeable surface in the basin; construction; reservoirs; sanitary sewer systems; land use and population density; road salt; animal waste; lawn and agricultural fertilizers, pesticides, and herbicides.
Connecticut water resources publications [More info]: Links to Connecticut water publications available as HTML and PDF formats.
Connectivity of tropical marine ecosystems--An overview of interdisciplinary research to understand biodiversity and trophic relationships in the Virgin Islands and Puerto Rico [More info]: Describes research to assess the effectiveness of the current system and distribution of marine reserves and protected areas in the Virgin Islands and Puerto Rico for conserving reef ecosystems and resources.
Contaminant exposure and effects--terrestrial vertebrates (CEE-TV) database [More info]: The information provided in the CEE-TV database profiles available geo-referenced information on contaminant exposure and effects in terrestrial vertebrates along the U. S. coasts. The database utilizes Microsoft's Access 2000 for Windows.
Continental shelf GIS for the Monterey Bay National Marine Sanctuary [More info]: Interactive maps of the continental shelf of the Monterey Bay National Marine Sanctuary with GIS layers for sediment data, bathymetry, geology, bathymetry, sonar imagery, and tectonics.
Contributions of the Conservation Reserve Program to populations of breeding birds in North Dakota [More info]: Assessment of the importance of the Conservation Reserve Program in preventing the decline of grassland breeding birds by preserving grassland habitats in North Dakota. Published as Wilson Bulletin v. 107 no. 4, pp. 709-718 (1995).
Cooperative Water Program [More info]: Program that monitors, assesses, and communicates the results of the quantity and quality of water in rivers and aquifers.
Cooperative Water Program -- a partnership in the Nation's Water-Resources Program [More info]: Fact sheet (also available in PDF format) on the ongoing partnership in water resources between the USGS and non-Federal agencies primarily state, tribal, county and municipal agencies with water-resources responsibilities.
Coral Diseases Following Massive Bleaching in 2005 Cause 60 Percent Decline in Coral Cover and Mortality of the Threatened Species, Acropora Palmata, on Reefs in the U.S. Virgin Islands [More info]: Record-high seawater temperatures and calm seas in the summer of 2005 led to the most severe coral bleaching (death) ever observed in the U.S. Virgin Islands.
Corals as climate recorders [More info]: Shows how coral reef specimens are collected, the type of information gained from them, and the methods by which they are measured and studied to understand recent (past few centuries) changes in climate.
County boundaries 2001: map layer description file [More info]: One of many map layers of the National Atlas giving county boundaries with metadata. The county boundaries map layer can be downloaded in shapefile or SDTS formats.
Cruise report by Coastal Surveyor Cruise C-1-99-SC: multibeam mapping of the Long Beach, California, continental shelf [More info]: Description of the work and results of a cruise by the Pacific Sea Floor Mapping project to map the Long Beach, California continental shelf based on data from high-resolution multibeam technology.
Data for giant constrictors - Biological management profiles and an establishment risk assessment for nine large species of pythons, anacondas, and the boa constrictor [More info]: Locations for nine species of large constrictors, from published sources, along with monthly precipitation and average monthly temperature for those locations. Shapefiles for each snake species studied.
Data visualization tools used in studies of the upper Mississippi River and nearby areas [More info]: Interactive maps and databases showing geospatial, biologic, and ecological aspects of the upper Mississippi River. Includes water quality, fish species, and vegetation distribution as well as geographic reference information.
Databases and simplified geology for mineralized areas, claims, mines, and prospects in Wyoming. [More info]: This data release contains mineral resource and geology data for metallic and nonmetallic mineral sites in Wyoming. Data is provided in both spreadsheet format (Microsoft Excel) and in GIS ArcView and MapInfo. Text available in PDF format.
Decadal-scale changes in dissolved-solids concentrations in groundwater used for public supply [More info]: Recent increases in dissolved-solids concentrations in this aquifer have been documented in some areas used for public supply, raising concerns as to the sources and causes of the higher concentrations and the long-term effects on groundwater quality.
Demography of the Pryor Mountain wild horses, 1993-2007 [More info]: Population size, foaling, deaths, age structure, sex ratio, age-specific survival rates, and more over a 14 year time span. This information will help land and wildlife managers find the best maintenance and conservation strategies.
Demonstrating usefulness of real-time monitoring at streambank wells coupled with active streamgages - Pilot studies in Wyoming, Montana, and Mississippi [More info]: To better understand the exchange of groundwater and surface water, we coupled groundwater monitoring at the stream bank with nearby gages in the stream. Describes the procedure and results from several areas.
Desert tortoise research at Western Ecological Research Center (WERC) [More info]: Links to research studies, conservation information, and general information on desert tortoises at the Western Ecological Research Center in Sacramento, California.
Detailed seafloor habitat mapping to enhance marine-resource management [More info]: We conduct systematic imaging of reef habitats in order to provide regulatory agencies with information they need to decide whether those reefs should be designated as protected areas.
Detecting Evidence of Climate Change in the Forests of the Eastern United States [More info]: The relation between seasonal forest change and weather is being tracked and analyzed by comparing precise field observations to regional patterns shown in long-term satellite imagery.
Detection and measurement of land subsidence using Global Positioning System surveying and interferometric synthetic aperture radar, Coachella Valley, California, 1996-2005 [More info]: Detailed measurements of elevation help to understand the extent and severity of subsidence. Study asks if subsidence indicates the aquifer system is compacting temporarily or permanently, and are the changes human-induced or tectonic.
Determinants of breeding distributions of ducks [More info]: Article from Wildlife Monographs no. 100 (1988) on the relationships of wetland habitat dynamics and life history to the breeding distributions of the various species of ducks with information on research methods and references.
Development of computational fluid dynamics--habitat suitability (CFD-HSI) models to identify potential passage--Challenge zones for migratory fishes in the Penobscot River [More info]: Proposed removal of dams will change the characteristics of stream flow and will affect fish that swim upstream to spawn. A mathematical model of the river flow tells us where the likely problems will be located and how the flow will change.
Development of industrial minerals in Colorado [More info]: Explains how industrial minerals are produced and overseen through governmental regulation, and describes the industrial mineral resources of central Colorado.
Devils Hole, Nevada--A Primer [More info]: Explains the important paleoclimatic information we have obtained from this subaqueous cavern. The time-series data show important contrasts with what would be predicted from orbital theory, provoking extensive scientific discussion.
Devils Lake, North Dakota [More info]: Includes hydrographic information from 2000 to last seven days, water-quality data, elevation, area, and capacity data and publications on Devils Lake, North Dakota in the Red River of the North basin.
Digital library: USGS Monterey Bay science [More info]: Online catalog of scientific reports and data around and about Monterey Bay, California, indexed by author, agency, project, location, feature type, and topic
Digital representation of tree species range maps from "Atlas of United States trees" by Elbert L. Little, Jr. (and other publications) [More info]: Maps of the ranges of tree species in North America compiled by Elbert Little and others were digitized for use in USGS vegetation and climate modeling studies. Can be downloaded as ArcView shapefiles and in PDF graphic files.
Digital shorelines for Boston Harbor [More info]: Modified version of paper by F.T. Manheim and A.G. McIntire, Civil Engineering Practice, Vol. 13, No. 1, pp. 35-48 (1998). A new shoreline file has been created for Boston Harbor by digitizing and combining the most recent charts.
Dissolved solids in basin-fill aquifers and streams in the southwestern United States [More info]
Distribution of high-temperature (>150 °C) geothermal resources in California [More info]: Description and map of geothermal resources in California.
Drilling a deep geologic test well at Hilton Head Island, South Carolina [More info]: With the South Carolina Department of Health and Environmental Control, USGS is drilling a deep geologic test well to learn about the regional Floridan aquifer, which provides groundwater to the Hilton Head area.
Drought and deluge: Effects of recent climate variability on groundwater levels in eastern Arkansas [More info]: Water levels in wells completed in the Mississippi River Valley alluvial aquifer and the Sparta aquifer in eastern Arkansas respond to variability associated with annual precipitation.
Drought watch - USGS state information on drought [More info]: Map display that highlights states where the streamflow index at USGS streamgages, averaged statewide, were below normal for the past seven days with links to comparison of recent streamflow values with historic values.
Drought watch Pacific Northwest states: Washington, Oregon, Idaho [More info]: Drought water homepage with links to maps showing streamflow conditions, drought definitions, resources, publications, and answers to Frequently Asked Questions (FAQs).
Duckdata: a bibliographic data base of North American waterfowl (Anatidae) and their wetland habitat [More info]: Comprehensive bibliography on the ecology, conservation, and management of North American waterfowl and their wetland habitats. Facilitates searching or downloading as *.zip files and use with ProCite utility.
Duration and current conditions graphs for selected Pennsylvania sites [More info]: Plots of streamflow averages and ground water depths for selected hydrologic sites in Pennsylvania.
Early Paleozoic biochronology of the Great Basin, western United States [More info]: Publication (PDF format) in three parts on the biostratigraphy and lithostratigraphy of the Ibexian Series in the North American Ordovician, with sections on the southern Egan Range, Nevada and the biostratigraphy of the eastern Great Basin.
Early results from the Northern Gulf of Mexico Ecosystem Change and Hazard Susceptibility Project [More info]: A coordinated set of studies shows development of coastal features, aspects of marine water quality, and impacts of hurricanes along this section of important coastline.
Earth Resources Observation & Science (EROS) [More info]: Access to products archived at the EROS Data Center, Sioux Falls, SD, including aerial photography, remote sensing data, satellite imagery, maps, and elevation data with product search retrieval and ordering information.
Earthquake "Top 10" Lists & Maps [More info]: Lists of largest earthquakes in the world and in the United States, earthquake facts and statistics, deaths from earthquakes, earthquakes by magnitude, and significant earthquakes.
Earthquake Hazards Program [More info]: Information on earthquake activity, earthquake science, and earthquake hazard reduction with links to news reports, products and services, educational resources for teachers, glossary, and current U.S. earthquake activity map.
Earthquake hazard in the New Madrid seismic zone remains a concern [More info]: GPS measurements made since 1996 seem to show this earthquake-prone area slowing down. Is it time to relax? Scientists who studied these data in detail say no, and this fact sheet explains why.
Earthquake science explained--a series of ten short articles for students, teachers, and families [More info]: Collects a series of short articles on earthquake science and related topics for students, teachers, and parents originally published as weekly features in The San Francisco Chronicle.
Earthquake: Did you feel it? Report it here. [More info]: Place to provide information about ground shaking associated with significant earthquakes. A questionnaire to let us know what you felt following an earthquake in the United States or in other countries.
Earthquakes and tsunamis in Puerto Rico and the U.S. Virgin Islands [More info]: Fact sheet on hazards from earthquakes and tsunamis in Puerto Rico and the U.S. Virgin Islands to be downloaded as a PDF file or viewed as an Adobe Acrobat Reader file.
Earthquakes in Hawaii -- an underappreciated but serious hazard [More info]: Shows where earthquakes occur here, the type of damage that has occurred, and the information that USGS provides to help people anticipate and understand this hazard.
Earthquakes in the central United States, 1699-2010 [More info]: Poster includes GIS data for earthquake locations in this seismically active area.
Earthworms of North Dakota [More info]: Species maps, aggregate map, earthworm diagram, species photos, and bibliography of earthworm species found in North Dakota
Ecological National Synthesis Project [More info]: National-scale perspective and assessments on aquatic ecology, and the chemical and physical factors that affect aquatic conditions and health.
Ecological risk assessment of toxic substances in the South Florida ecosystem: wildlife effects and exposure assessment [More info]: Project summaries and publications on wildlife contaminant exposures and prediction and monitoring of future restoration-driven exposures within the South Florida ecosystems.
Economics of undiscovered oil in the federal lands of the National Petroleum Reserve, Alaska [More info]: Online report summarizing the economic analysis of the U.S. Geological Survey's 2002 petroleum assessment of the Federal lands in the National Petroleum Reserve Alaska (NPRA) study area.
Ecosystems of South Florida [More info]: An overview with brief descriptions and photographs of some of South Florida's unique ecosystems.
Edwards Aquifer online resources [More info]: Recharge and discharge summaries and other data, aeromagnetic survey map, and publications on Edwards Aquifer, Texas.
Effects of Building a Sand Barrier Berm to Mitigate the Effects of the Deepwater Horizon Oil Spill on Louisiana Marshes [More info]: An assessment of the potential protective effects on coastal marshes in Louisiana of building barrier berms seaward of the existing barrier islands and inlets to help block or reduce the onshore spread of oil from the Deepwater Horizon oil spill.
Effects of Ocean Acidification and Sea-Level Rise on Coral Reefs [More info]: By measuring the current and historical growth rates of coral skeletons, and using field experiments, we intend to find out whether rising atmospheric CO2 and rising sea levels will cause coral reefs to erode and cease to function.
Effects of brush management on the hydrologic budget and water quality in and adjacent to Honey Creek State Natural Area, Comal County, Texas, 2001--10 [More info]: Comparison of water in two adjacent watersheds before and after implementing a brush management strategy in one of the watersheds helps us see what water resource characteristics are sensitive to brush management and how.
Effects of climate change and land use on water resources in the Upper Colorado River Basin [More info]: Information from climate model forecasts, projections of future flows, paleoclimatic indicators, timing of snowmelt, airborne dust, and the effects on vegetation of troublesome pest species indicate the nature and severity of problems looming.
Effects of land use on water quality in Michigan [More info]: Links to projects that provide information on the relation of land use to water quality, sources of pollutants, or trends in water quality.
Elwha River dam removal -- Rebirth of a river [More info]: Overview of the USGS role in the largest dam removal project in U.S. history.
End-of-month hydrologic condition reports for New York State [More info]: Site to locate most recent or archive reports for end-of-the-month hydrologic conditions with descriptions, data, charts, and maps giving an overview of water conditions during the month for the state of New York.
Energy Resources Program - Western Region [More info]: Home page for the Western Region Energy Resources Program with links to Alaska petroleum studies project, coal, oil and gas, other energy sources, environment and human health, and publications.
Enhancement of USGS scientific investigations in Texas by using geophysical techniques, 2005-10 [More info]: Annotated bibliography describing the use of electromagnetic surveying to understand the characteristics of aquifers and how they work.
Environment and human health [More info]: Home page for USGS research on the relationship of environment and health with links to fact sheets, reports, projects and programs, Human Health database and meeting and conferences.
Environmental Monitoring and Assessment Program Western Pilot Project - Conditions of North Dakota Perennial Streams for Water Chemistry and Mercury in Fish Tissue, 2000-2003 [More info]: Sixty-five sampling sites, selected by a statistical design to represent lengths of perennial streams in North Dakota, were chosen to be sampled for water chemistry and mercury in fish tissue to establish unbiased baseline data.
Environmental Monitoring and Assessment Program Western Pilot Project - Information about selected fish and macroinvertebrates sampled from North Dakota perennial streams, 2000-2003 [More info]: Sixty-five sampling sites, selected by a statistical design to represent lengths of perennial streams in North Dakota, were chosen to be sampled for fish and aquatic insects (macroinvertebrates) to establish unbiased baseline data.
Environmental effects of historical mining in the Animas River watershed, southwestern Colorado [More info]: History and summary maps showing metal concentrations downstream of the mining area.
Environmental investigations using diatom microfossils [More info]: Explains use of diatom assemblages in understanding the history of coastal wetlands.
Environmental processes that affect mineral deposits in the Eastern United States [More info]: Studies in Eastern United States on massive sulfide deposits in Maine, Vermont, Great Smoky Mountains, and Virginia to assess potential environmental impacts.
Environmental studies of the World Trade Center area after the September 11, 2001 attack [More info]: Report describing the results of an interdisciplinary environmental study of the World Trade Center (WTC) area after the attack on September 11, 2001. The investigations included imaging spectroscopy mapping and laboratory analysis.
Epic Flooding in Georgia, 2009 [More info]: In September of 2009, flooding in parts of Georgia reached levels expected every 500 years. Specific measurements we made and other facts about these disasters described here should help people prepare for floods here and elsewhere.
Erosion in the Rio Puerco: geography and processes [More info]: Paper on the accelerated erosion of the Rio Puerco, a tributary of the Rio Grande in New Mexico, which has deepened and widened its channel, or arroyo, since the settlement of the region.
Erosion of a sea stack over 100 years [More info]: Series of photographs showing the demise of Jump-off Joe, a sea stack at Nye Beach, Newport, Oregon from 1890 as a result of erosion.
Eruptions from the Inyo chain about 600 years ago: sequence of events and effects in the Long Valley Area [More info]: Describes the volcanic activity that occurred along the southern part of the Mono-Inyo Craters volcanic chain in California about 600 years ago.
Eruptions in the Cascade Range during the past 4,000 years [More info]: Chart showing 13 volcanoes on a map of Washington, Oregon, and northern California, along with time lines for each volcano showing the ages of their eruptions.
Eruptions of Hawaiian volcanoes - past, present, and future [More info]: Originally published in 1987, this general-interest booklet has been revised in anticipation of the Centennial of the Hawaiian Volcano Observatory (HVO) in January 2012.
Eruptions of Lassen Peak, California, 1914 to 1917 [More info]: Summary of the most recent eruption of Lassen Peak, Cascades (1914-1917)
Eruptions of Mount St. Helens: past, present, future [More info]: Online booklet on the 1980 eruption of Mount St. Helens, past history, and future hazards.
Estimated freshwater withdrawals in Oklahoma [More info]: Freshwater withdrawal estimates for Oklahoma by source and category. Withdrawal data from ground water and surface water for domestic, commercial and agricultural use.
Estuaries of the Greater Everglades Ecosystem: Laboratories of Long-term Change [More info]: Explains how we reconstruct past environmental conditions, especially salinity, to help guide ecosystem restoration efforts in this area.
Evaluating the variability of sediment and nutrient loading from riverine systems into Texas estuaries and bays [More info]: Some results from a study of the variability of sediment and nutrient loads in the lower reaches of the Trinity River during a variety of hydrologic conditions.
Evaluation of Structural Best Management Practices for Highway Runoff in Beaufort and Colleton Counties, South Carolina, 2005-2006 [More info]: Summarizes the ability of four devices to remove suspended sediment, metals, nutrients, and organics compounds in stormwater runoff.
Evaluation of fecal contamination by human and ruminant sources in upper Fountain Creek, Colorado, 2007-2008, by using multiple lines of evidence: [More info]: Microbial source tracking analysis of water sampled supports the argument that birds are the primary source of fecal contamination during the warm season.
EverView Data Viewer [More info]: Software and data to help people model the likely response of populations of organisms to various strategies that might be employed to remedy the effects of damaged ecosystems.
Everglades Depth Estimation Network (EDEN) for support of biological and ecological assessments [More info]: Integrated network of real-time water-level monitoring, ground-elevation modeling, and water-surface modeling that provides scientists and managers with current on-line water-depth information for the entire freshwater portion of the Greater Everglades.
Evolution of 3-D geologic framework modeling and its application to groundwater flow studies [More info]: Methods to depict the connectedness of rock units across fault and fracture zones, allowing us to determine the distribution of geologic units, structural features, and other controlling factors, such as porosity and permeability.
Examination of brine contamination risk to aquatic resources from petroleum development in the Williston Basin [More info]: Wetlands and oil wells shouldn't mix, but in some areas they do. This explains what problems may arise and how we study the effects of highly salty water produced by oil wells when it leaks into nearby wetlands and streams.
Executive summary, workshop: seismic and tsunami hazard in Puerto Rico and the Virgin Islands [More info]: Summary of workshop with links to reports that are recommendations for future projects.
Expanded USGS science in the Chesapeake Bay restoration [More info]: Spurred by an executive order, Federal agencies will reinvigorate their studies of this important watershed. This fact sheet describes what they plan to do and how.
Extent of Pleistocene lakes in the western Great Basin [More info]: Map of Pleistocene pluvial lakes in the western Great Basin (Nevada, eastern California, southern Oregon). Includes metadata, online PDF map view, and downloadable ArcInfo export files, ArcView shapefiles, and TIFF files.
Extreme drought to extreme floods: summary of hydrologic conditions in Georgia, 2009 [More info]: Discusses the nature and extent of extreme hydrologic events, with supporting observations of the water conditions and their effects on human activities.
Facing the great disaster: How the men and women of the U.S. Geological Survey responded to the 1906 "San Francisco Earthquake" [More info]: After the powerful earthquake of April 18, 1906, staff of the U.S. Geological Survey stationed in Sacramento and Berkeley brought help to the residents of devastated San Francisco, documented the effects of the quake, and investigated its causes.
Fact sheet: Coping with diseases at bird feeders [More info]: Describes four communicable diseases (salmonellosis, trichomoniasis, aspergillosis, and avian pox) that can be passed from bird to bird at bird feeders and gives eight relatively easy steps that people can take to prevent or minimize disease.
Famous building stones of our Nation's capital [More info]: Describes the types and sources of materials used to build some of the most famous landmarks in Washington D.C.
Farm ponds as critical habitats for native amphibians [More info]: Constructed farm ponds represent significant breeding, rearing, and overwintering habitat for amphibians in the Driftless Area Ecoregion of Minnesota, Wisconsin, and Iowa. Links to fact sheet, brochure, annual reports, field manual, and final report.
Fault and fold database of the United States [More info]: Online database of faults and associated folds in the United States that are believed to be sources of significant earthquakes during the last 1.6 million years.
Field Conference on Impacts of Coalbed Methane Development in the Powder River Basin, Wyoming. [More info]: Field trip to Powder River Basin coalbed methane (CBM) development areas showing impacts related to drilling, facilities, pipeline networks, access roads, withdrawal, and disposal of co-produced water from CBM wells.
Field guide to the reptiles and amphibians of coastal Southern California [More info]: Field guide to identify the reptiles and amphibians of coastal Southern California with glossary and map.
Field methods: capture and marking of pintails [More info]: Method of tracking pintail ducks by capturing with rocket nets or swim-in traps and attaching telemetry devices that allow satellite tracking. Includes video of rocket nets.
Fifty-Year Record of Glacier Change Reveals Shifting Climate in the Pacific Northwest and Alaska, USA [More info]: Accelerating loss of mass, weakening correlation with the Pacific Decadal Oscillation, and increasing mass turnover likely are the result of changes to warmer and drier climate conditions that are affecting three well-studied glaciers.
Fire ecology research [More info]: Study of wildland fire history and fire ecology such as plants in the Sierra Nevada forests, California shrublands, the Mojave, and Sonoran deserts to develop management techniques that will reduce hazards.
Fish passage through dams in large temperate floodplain rivers: an annotated bibliography [More info]: Report describes an electronic database of annotated citations relevant to fish passage through dams. Document may be searched using the search form or downloaded as an Endnote, Microsoft Word, or WordPerfect
Flagstaff Field Center [More info]: Homepage for the Flagstaff Field center with links to space science, water and ice studies, earth sciences, biological resources, Grand Canyon Monitoring and Research Center, outreach & education, data and software, and images.
Flood inundation map library, Fort Kent, Maine [More info]: Severe flooding occurred in northern Maine from April 28 to May 1, 2008, and damage was extensive in the town. Aroostook County was declared a Federal disaster area. Our flood inundation maps were out of date, so we have updated them; this explains how.
Flood of April and May 2008 in Northern Maine [More info]: Characteristics and effects of a flood in this area.
Floods of May 2006 and April 2007 in Southern Maine [More info]: Characteristics and consequences of some extreme storm events
Floor of Lake Tahoe, California and Nevada [More info]: Postcard available for downloading and printing.
Floristic Quality Index: An assessment tool for restoration projects and monitoring sites in coastal Louisiana [More info]: Explains how we assessed the quality of a wetland as indicated by its plant species composition and abundance for marsh and swamp sites, to summarize the effectiveness of restoration projects in Louisiana.
Fluvial geomorphology studies in Kansas [More info]: Report of completed studies that have investigated the response of river and stream channels in Kansas to a variety of human-caused and natural disturbances.
Flying by Night: USGS Scientists Put Technology to Work on Bats [More info]: Short description of techniques used to monitor migration patterns and behavior of bats in New Mexico.
Forecasting California's earthquakes - What can we expect in the next 30 years? [More info]: Shows how we know severe earthquakes will occur and where.
Forecasting the effects of land-use and climate change on wildlife communities and habitats in the lower Mississippi Valley [More info]: Describes the analytical process by which spatial scientific information contributes to forecasts and models in support of regional and local decision-making.
Forest and Rangeland Ecosystem Science Center [More info]: Home page of the Forest and Rangeland Ecosystem Science Center, Corvallis, providing research and technical support for ecosystem management in the western U.S. Links to projects, field stations, fact sheets, partnerships, and publications.
Forest and Rangeland Ecosystem Science Center: Fact Sheets [More info]: Access to Forest and Rangeland Ecosystem Science Center fact sheets on fish, fish diseases, aquatic resources, and other projects and activities.
Forest and rangeland birds of the United States: natural history and habitat use [More info]: Catalog of bird species common to forest and rangeland habitats in the U.S. with natural histories including taxonomic information, range, and habitat descriptions to assist land managers in resource management. Text available as a *.zip file.
Fort Collins Science Center [More info]: Homepage of the Fort Collins Science Center in Colorado with links to programs in ecological research programs, staff directory, products library, news and events, and research features and spotlights.
Fossil locations and data for the Taylor Mountains, and parts of the Bethel, Goodnews, and Dillingham quadrangles, southwestern Alaska [More info]: Location, taxa present, and geological context for 290 fossil samples collected in this area.
Framework for a U.S. Geological Survey Hydrologic Climate-Response Program in Maine [More info]: Discussion of the scientific measurements needed to understand the effects of climate change on the seasonal water cycle, with emphasis on Maine.
From ridge to reef--linking erosion and changing watersheds to impacts on the coral reef ecosystems of Hawai‘i and the Pacific Ocean [More info]: Explains how land processes on hills near the shoreline affect the health of coral reefs.
Front Range Infrastructure Resources Project (FRIRP) [More info]: Home page for the Front Range Infrastructure Resources Project, a demonstration study of the northern Colorado Front Range urban corridor and the entire Rocky Mountain Front Range urban corridor with links to projects, datasets, and publications.
Galveston Bay Wetland Inventory Project [More info]: Links to reports, partners, principal investigators, maps, aerial photos, and contacts for the Galveston Bay Wetland Inventory Project.
Generalized geologic map of the Yosemite National Park area [More info]: Surficial geologic map of the Yosemite National Park area with links to the legend and text.
Generalized surficial geologic map of the Pueblo 1 degree x 2 degree quadrangle, Colorado. [More info]: Surficial geologic map of the Pueblo quadrangle in Colorado with text and references in PDF format, metadata, and GIS files to download.
Geochemistry of the Arbuckle-Simpson Aquifer [More info]: Describes the geographic extent, quality, origin, and dynamic character of this aquifer located in south central Oklahoma.
Geographic Information Systems (GIS) in Missouri [More info]: Website with links to USGS hydrologic, geohydrologic, soil, and geologic projects in Missouri using geographic information systems (GIS) technology with digital datasets of images, models, and maps produced by the projects to view.
Geographic science of Alaska [More info]: Descriptions, results, and data on research projects using geographic analysis and monitoring and remote sensing to study ecosystems and land processes in the Arctic region.
Geologic framework and process of the Lake Pontchartrain Basin [More info]: Field methods, topics of investigation, shoreline changes, publications, and satellite imagery related to geologic and hydrologic processes affecting Lake Pontchartrain and adjacent lakes which form a large estuary in the Gulf Coast region.
Geologic history of Cape Cod, Massachusetts [More info]: Describes the history, geologic changes (including the glacial formation and sea level changes), and geologic mapping of Cape Cod, Massachusetts.
Geologic history of Long Valley Caldera and the Mono-Inyo Craters volcanic chain, California [More info]: Summarizes the geologic and volcanic activity of the Long Valley Caldera and Mono-Inyo Craters volcanic chain in east central California.
Geologic map of the Eagle quadrangle, Eagle County, Colorado [More info]: The Eagle quadrangle covers an area that straddles the Eagle River and Interstate 70 (I-70) and it includes the town of Eagle, Colo., which is located in the southwestern part of the quadrangle, just south of I-70 and the Eagle River, about 37 km west of
Geologic mapping in National Parks: National Park Service Support Project [More info]: Summaries of geologic projects in cooperation with the National Park Service including Grand Canyon National Park, Lake Mead National Recreation Area, Golden Gate National Recreation Area, Joshua Tree National Park, Yosemite National Park, and others.
Geologic studies of mercury [More info]: Collection of six short papers related to the mercury geochemical society, the study of mercury in coal, concentrations in sediment, soil, water, and fish collected near mercury and gold mines, and volanic emissions of mercury.
Geology and hydrogeology of the Florida Keys [More info]: Article on geology and hydrogeology of the Florida Keys with sections on Holocene and Pleistocene geology, water resources, and introduction with a brief history and overview of early studies.
Geology of Lake Meade National Recreation Area [More info]: Site has links to Lake Mead National Recreation Area: geologic field trips, geologic history, plate tectonics, rocks and minerals, geologic time, geologic maps, and glossary.
Geology of Mojave National Preserve [More info]: Site has links to Mohave National Preserve: geologic field trips, geologic history, plate tectonics, rocks and minerals, geologic time, geologic maps, and glossary.
Geology of Sunset Crater Volcano National Monument [More info]: Site has links to Sunset Crater Volcano National Monument geologic field trips, geologic history, plate tectonics, rocks and minerals, geologic time, geologic maps, and glossary.
Geology of the Chesapeake and Ohio Canal National Historical Park and Potomac River Corridor, District of Columbia, Maryland, West Virginia, and Virginia [More info]: Rocks representing a variety of tectonic and depositional environments outcrop along the canal and towpath and reveal the geologic history of the central Appalachian region from the Mesoproterozoic to Jurassic Period.
Geology of the Devonian Marcellus Shale--Valley and Ridge province, Virginia and West Virginia--a field trip guidebook for the American Association of Petroleum Geologists Eastern Section Meeting, September 28-29, 2011 [More info]: Detailed background information with descriptions of sites and photos explaining the geology of this organic-rich shale unit that has recently become a significant source of natural gas resources.
Geology of the New York City Region: A Preliminary Regional Field-Trip Guidebook [More info]: Provide basic information about the natural history and geologic features of the landscape encompassing the greater New York City metropolitan area.
Geology of the onshore part of San Mateo County, California: a digital database [More info]: This digital map database represents the general distribution of the geology (bedrock and surficial deposits) in San Mateo County. Accompanying text file (*.txt or *.ps) provides current information on the geologic structure and stratigraphy.
Geomorphology and sediment transport -- river mechanics [More info]: Current river mechanics research on particle friction angles of fluvial gravels (data files compressed in BenHex, Winzip and Unix) and Grand Canyon Beach evolution (animation requiring Java 1.0) plus digital elevation files (*.hgx and *.zip files).
Georgia's Stream-Water-Quality Monitoring Network, 2006 [More info]: USGS stream-water-quality monitoring network for Georgia represents an aggregation of smaller networks and individual monitoring stations, with map and link to data.
Geospatial Multi-Agency Coordination (GeoMAC) wildland fire perimeters, 2008 [More info]: Where the fires were, as GIS data in shapefile format, geographic coordinates, NAD83.
Geothermal industry temperature profiles from the Great Basin [More info]: Subsurface temperature, well temperature, and well data of geothermal resources in the Great Basin.
Giant Canada goose flocks in the United States [More info]: Review of the size of breeding populations of Giant Canada geese by states in the Mississippi, Atlantic, Central, and Pacific flyways and the management problems caused by rapid increases of local breeding populations.
Glacier effects of the M7.9 Denali fault earthquake of November 3, 2002 [More info]: Description and photos documenting offsets and 260 km rupture in the Denali glacier in central Alaska after the November 3, 2002 earthquake, the 9th largest earthquake in the United States in the last 200 years.
Global inventory of natural gas hydrate occurrence [More info]: This updated global inventory reports on natural gas hydrate recovered or inferred from geophysical, geochemical, or geological evidence. Includes links to world location maps, inventories, references and posters. Also in PDF format files.
Grand Canyon studies: using ocean-research techniques to study a river system [More info]: Brief review of studies with sidescan sonar on sediment in the Grand Canyon as part of research on the changes brought about by the Glen Canyon Dam and the results gathered from a 1996-controlled flood experiment with links to related information.
Great Lakes Beach Health Initiative [More info]: Research and development efforts to improve our ability to provide scientific information needed by local beach managers faced with questions about environmental quality and possible beach closure or resource usage.
Great Lakes Science Center [More info]: Site for Great Lakes Science Center, Ann Arbor, which provides information about biological resources in the Great Lakes Basin. Links to personnel, publications, data, library, facilities, research vessels, Great Lakes issues, and research.
Great Lakes Science Center research vessels [More info]: Description of ships used for Great Lakes research by scientists at the Great Lakes Science Center.
Great Lakes assessment of water availability and use [More info]: Information about basin storage, historical changes, and consumptive water use for manages and planners to use to develop policies for efficient and sustainable water use.
Great Lakes issues [More info]: Water resources problems of the Great Lakes including water use, bacterial contamination on beaches, status of water resources, and ground water flow.
Grizzly bear and black bear ecology [More info]: Summaries of research projects on black bear and grizzly ecology and ecosystems supporting the populations and bibliography of related publications.
Ground water atlas of the United States [More info]: The U.S. ground water atlas consists of information on ground water resources of 13 regions covering the 50 States, Puerto Rico, and the U.S. Virgin Islands. Text and maps can be viewed online and downloaded as ASCII, GIF, and *.eps files.
Ground water climate response network [More info]: Map showing a network of selected ground water wells in the U.S. The water levels in these wells are used to monitor the effects of droughts and other climate variability.
Ground-shaking hazard from earthquakes [More info]: Postcard available for downloading and printing.
Ground-water availability in the United States [More info]: Report examines what is known about the Nation's ground-water availability, and outlines a program of study to improve our understanding of ground-water availability in major aquifers across the Nation. With regional examples.
Ground-water data for Alabama [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Alaska [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Arizona [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Arkansas [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for California [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Colorado [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Connecticut [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Delaware [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for District of Columbia [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Florida [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Georgia [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Hawaii [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Idaho [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Illinois [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Indiana [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Iowa [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Kansas [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Kentucky [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Louisiana [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Maine [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Maryland [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Massachusetts [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Michigan [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Minnesota [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Mississippi [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Missouri [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Montana [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Nebraska [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Nevada [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for New Hampshire [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for New Jersey [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for New Mexico [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for New York [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for North Carolina [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for North Dakota [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Ohio [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Oklahoma [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Oregon [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Pennsylvania [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Rhode Island [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for South Carolina [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for South Dakota [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Tennessee [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Texas [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Utah [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Vermont [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Virginia [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Washington [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for West Virginia [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Wisconsin [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for Wyoming [More info]: Consistent, historic, and up-to-date ground-water data, such as water levels collected at wells and springs, are available from the USGS National Water Information System as graphs, tables, or files to download.
Ground-water data for the Nation [More info]: National Water Information System (NWIS) real-time data on selected ground water sites, ground water level data, site inventory of wells, test holes, drains, springs and excavations and ground water-quality data for the United States.
Ground-water flow and other computer simulations for Utah [More info]: Identifies computer models in USGS publications developed to study ground water for many areas of Utah.
Ground-water monitoring for pesticides in Wyoming [More info]: Sampling program to determine if pesticides are present in ground water, in accordance with Wyoming's Generic State Management Plan for Pesticides in Ground Water (SMP).
Ground-water recharge in the arid and semiarid southwestern United States [More info]: A systematic presentation of climatic and hydrogeologic framework of the area, regional analysis of ground-water recharge, and an overview of 8 site-specific case studies.
Ground-water resources of Louisiana [More info]: Links to Louisiana statewide aquifer and well information by locating parish on a map or selecting parish, aquifer, region, or type of ground-water data (real-time water levels or geophysical data) from lists.
Groundwater Quality in the Central Eastside San Joaquin Valley, California [More info]: Summary of a detailed study in this agricultural area.
Groundwater Quality in the Kern County Subbasin, California [More info]: Arsenic was the trace element most frequently present at high concentrations here. High concentrations of arsenic result from the interaction of groundwater with naturally occurring minerals.
Groundwater Quality in the Southeast San Joaquin Valley, California [More info]: Arsenic and nitrate are the constituents found most commonly at high concentrations in the primary aquifers. Arsenic comes from natural sources and is affected by pH and dissolved oxygen.
Groundwater availability study for Guam; goals, approach, products, and schedule of activities [More info]: Process and plan to be used to provide reliable evaluations of the potential effects of groundwater production and help guide sustainable management of the resource.
Groundwater quality in Coachella Valley, California [More info]: Five trace elements with human-health concerns were detected at high concentrations: arsenic, boron, fluoride, molybdenum, and strontium. Vanadium was present at moderate concentrations.
Groundwater quality in the Antelope Valley, California [More info]: Trace elements were present at high concentrations in 32% of the primary aquifers here, and at moderate concentrations in 17%. Of particular interest are aluminum, arsenic, vanadium, boron, fluoride, chromium, lead, and molybdenum.
Groundwater quality in the Central Sierra Nevada, California [More info]: Recent study indicates that inorganic trace elements and radioactive constituents are more likely to be subjects of concern in this less-developed area than anthropogenic organic compounds.
Groundwater quality in the Coastal Los Angeles Basin, California [More info]: The occurrence of solvents in the groundwater is not correlated with current overlying land use and human activities. Rather, the solvents are from legacy industrial uses, and it has taken decades for the groundwater to move to where it is now pumped.
Groundwater quality in the Colorado River basins, California [More info]: Five trace elements with human-health concerns were detected at high concentrations: arsenic, boron, fluoride, molybdenum, and strontium. Chromium was detected at moderate concentrations.
Groundwater quality in the Indian Wells Valley, California [More info]: Five trace elements with human-health concerns were detected at high concentrations: arsenic, boron, molybdenum, strontium, and vanadium. Chromium and fluoride were detected at moderate concentrations.
Groundwater quality in the Madera and Chowchilla subbasins of the San Joaquin Valley, California [More info]: Uranium, arsenic, and nitrate were the inorganic constituents that were most frequently detected at high concentrations, mostly in shallower wells. High and moderate concentrations of arsenic were detected in deeper wells.
Groundwater quality in the Middle Sacramento Valley, California [More info]: Results of a survey of contaminants in untreated groundwater in this area. Arsenic and boron were the two trace elements detected most frequently at concentrations greater than the benchmarks.
Groundwater quality in the Mojave area, California [More info]: Six elements with human-health concerns were detected at high concentrations: arsenic, boron, fluoride, molybdenum, strontium, and vanadium. Lead was present at moderate concentrations.
Groundwater quality in the Monterey Bay and Salinas Valley groundwater basins, California [More info]: This study of untreated groundwater indicates the number of samples in which inorganic or organic constituents occur in high or moderate in concentration. The study does not indicate significant problems in groundwater quality here.
Groundwater quality in the Northern Sacramento Valley, California [More info]: Results of a survey of contaminants in untreated groundwater in this area, separating inorganic from organic constituents.
Groundwater quality in the Northern San Joaquin Valley, California [More info]: Arsenic and boron were the trace elements that most frequently occurred at high concentrations. Fumigants (pesticides) were detected at high concentrations in 3% of the primary aquifers. Herbicides and insecticides were detected at low concentrations.
Groundwater quality in the Owens Valley, California [More info]: Trace elements boron, arsenic, and molybdenum were found at high concentrations in 15% of primary aquifers in this area.
Groundwater quality in the San Diego Drainages Hydrogeologic Province, California [More info]: Vanadium and boron were detected at high and moderate concentrations in this area. High concentrations for these constituents were detected almost exclusively in samples collected in the Temecula Valley study area.
Groundwater quality in the San Fernando--San Gabriel groundwater basins, California [More info]: Organic solvents are the chief concern in this area, which has given rise to a systematic program of monitoring and water treatment. This study shows relatively recent results.
Groundwater quality in the San Francisco Bay groundwater basins, California [More info]: The constituent present at high concentrations in the greatest proportion of the primary aquifer system was TDS, which is an indicator of salinity. Perchlorate was also present at moderate concentration in 42% of samples.
Groundwater quality in the Santa Clara River Valley, California [More info]: This study of untreated groundwater indicates the number of samples in which inorganic or organic constituents occur in high or moderate in concentration. The study does not indicate significant problems in groundwater quality here.
Groundwater quality in the Southern Sacramento Valley, California [More info]: Results of a survey of contaminants in untreated groundwater in this area. Arsenic and boron were the trace elements occurring most frequently at high concentrations.
Groundwater quality in the Southern Sierra Nevada, California [More info]: Recent study indicating inorganic constituents as the primary items of concern in this area. Chemical and mineralogical compositions of the aquifer rocks probably explain variation among localities here.
Groundwater quality in the Tahoe and Martis Basins, California [More info]: Recent study encountered occasional high values of radioactive trace elements, but the water quality in this area as monitored compares favorably to more urban areas studied by the same group.
Groundwater quality in the Upper Santa Ana Watershed study unit, California [More info]: Recent study indicating nitrate and perchlorate are the primary inorganic constituents of interest here, coming from human activities such as agriculture.
Groundwater quality in the north San Francisco Bay groundwater basins, California [More info]: Summary of chemical constituents of ground water that are of concern to human activity in this area. Arsenic is the constituent that occurs most frequently in high concentrations.
Groundwater quality of southeastern Wyoming [More info]: Explains how we assess groundwater quality here, what characteristics are important, and how they hurt or, in some cases, help use use the water.
Groundwater recharge in Wisconsin--Annual estimates for 1970-99 using streamflow data [More info]: The groundwater component of streamflow is important because it is indicative of the sustained flow of a stream during dry periods, is often of better quality, and has a smaller range of temperatures, than surface contributions to streamflow.
Gulf Coast Framework Studies Home Page [More info]: Provides geologic, geophysical, and geochemical framework studies that will aid in a reassessment of energy commodities (coal, gas, and oil) in the Gulf Coast Region.
Gulf of Maine internet map [More info]: Gulf of Maine regional overview interactive map depicting research activities of the U.S. Geological Survey showing surficial sample sites, bathymetry, continental margin and coastal areas.
Gulf of Mexico Estuaries Integrated Science Strategy [More info]: A white paper describing a plan for USGS research in Gulf of Mexico estuaries, developed in 2001 using Tampa Bay as an example with links to program strategy and design.
Gulf of Mexico Integrated Science [More info]: Website of the Gulf of Mexico Integrated Science program to understand the framework and processes of the Gulf of Mexico using Tampa Bay as a pilot study. Links to publications, digital library, water chemistry maps, epiphytes, and field trips.
Gulf of the Farallones disposal issues: disposal and waste disposal [More info]: Study of the effects on the Gulf of the Farallones National Marine Sanctuary resulting from the disposal of San Francisco dredged material and barrels of low-level radioactive waste with links to publications and atlas with digital images.
Hawaiian Volcano Observatory [More info]: Hawaiian Volcano Observatory's latest news with links to information on Kilauea, Mauna Loa, and other volcanoes, earthquakes, volcanic hazards, photo archive, and general information about the center.
Hawaiian Volcano Observatory (HVO) earthquakes: HVO seismic network [More info]: Description of the seismic monitoring of the active Hawaiian volcanoes with information on the network, instrumentation, and recording stations with links to related information.
Hawaiian Volcano Observatory spotlight images archive [More info]: Images of Hawaiian volcanoes and the islands they've built in the past few million years, images of recent eruptions, and Hawaiian landscapes.
Hawaiian duck's future threatened by feral mallards [More info]: The greatest threat to the future of the Koloa maoli as a unique species is cross-breeding with the introduced Mallard duck. This type of threat is termed genetic extinction.
Hazards Management in Grand County, Colorado-Fire Fuels Characterization [More info]: Using land cover, vegetation, vegetation health, and other characteristics derived from remote-sensing imagery, we develop geospatial models depicting the susceptibility of this area to wildfires.
Hazards, disasters, and the National Map [More info]: Fact sheet describing the value of The National Map designed as a network of digital databases that will provide a consistent national geographic data framework in responding to natural hazards and human-induced disasters.
High Plains aquifer resources and information [More info]: Links to reports, bibliographies, and other information on the High Plains aquifer.
Historic Flooding in South Georgia, March 27-April 3, 2009 [More info]: Explains the meteorological and hydrologic conditions that led to widespread flooding in this area.
Historic flooding in northern Georgia, September 16-22, 2009 [More info]: Explains the meteorological and hydrologic conditions that led to widespread flooding in this area.
Historical changes in annual peak flows in Maine and implications for flood-frequency analyses [More info]: Annual peak flows have increased at most rivers in Maine during the last century. What effect does this have on computed peak flows, such as the 100-year flows, that are used for designing bridges and other structures?
Historical interrelationships between population settlement and farmland in the conterminous United States, 1790 to 1992 [More info]: Chapter from Land Use History of the North America on the results of a study to understand the interactions of population growth, urbanization, and agricultural activity over time.
Historical landcover changes in the Great Lakes region [More info]: Results of a study that provides a regional vegetation history of the Great Lakes area during the last 150 years compared to the preceding 1,000 years.
Historical streamflows of Double Mountain Fork of Brazos River and water-surface elevations of Lake Alan Henry, Garza County, Texas, water years 1962-2010 [More info]: Shows graphs illustrating available data from two surface-water monitoring stations near this reservoir supplying water for the city of Lubbock.
History and ecology of mangroves in the Dry Tortugas [More info]: Fact sheet on the historic and current conditions of mangroves of Dry Tortugas National Park, a cluster of islands and coral reefs west of Key West, Florida. Mangroves and nesting frigate bird colonies are at risk to destruction by hurricanes.
History and natural history of the Patuxent Wildlife Research Center [More info]: Links to pages on the history and natural history of Patuxent Wildlife Research Center.
Holocene evolution of Apalachicola Bay, Florida [More info]: Geophysical surveying, combined with analysis of sediment cores and radiometric dating were used to describe the likely history of formation of this area.
Housing arrangement and location determine the likelihood of housing loss due to wildfire [More info]: Using a geographic dataset of structures, with more than 5500 structures that were destroyed or damaged by wildfire since 2001, we identified the main contributors to property loss in two extensive, fire-prone regions in southern California.
Hudson River salt front data [More info]: Tide stage, specific conductance, water temperature, and freshwater inflow at selected Hudson River (New York) gages updated every 4-hours to measure the effects of freshwater withdrawals and upstream movement of the salt front.
Hurricane Katrina disaster: general information and USGS response [More info]: Observations and effects of hurricane Katrina, with information about USGS monitoring and studies related to the area affected.
Hurricane Katrina photographs August 30, 2005 [More info]: Photographic survey of the impacts of Hurricane Katrina on the barrier islands, barrier shoreline, and the Mississippi River Delta along the Louisiana coastline. Primary focus is on the ecosystems such as fish, rookeries, and seagrass beds.
Hurricane and extreme storm impact studies: coastal and nearshore mapping with oblique aerial video and still photography [More info]: Information on video and still photography used to supplement laser altimetry measurements of the coast. The photography is used for recognizing geomorphic and cultural features impacted by storms. Links to photo collections of hurricanes and El Nino.
Hurricane and extreme storm impact studies: hurricanes, El-Niño, & northeasters [More info]: Description of three types of severe coastal storm impacts: hurricane impacts on the southeast U.S., extra-tropical storm impacts on the U.S. west coast during El-Nino winters, and 'northeaster' impacts on the U.S. east coast.
Hurricane impact and recovery shoreline change analysis of the Chandeleur Islands, Louisiana, USA: 1855 to 2005 [More info]: Results from historical (1855-2005) shoreline change analysis demonstrate that tropical cyclone frequency dominates the long-term evolution of this barrier-island arc.
Hydrogeologic framework of Antelope Valley and Bedell Flat, Washoe County, west-central Nevada [More info]: Description of the hydrogeologic framework of Antelope Valley and Bedell Flat in west-central Nevada north of Reno-Sparks area. Gravimetric and seismic-refraction methods were used in the study. Report available in PDF format or HTML format.
Hydrologic conditions for Illinois: Drought perceptions, effects, and assessment [More info]: Map of stream conditions and links to precipitation data, drought statistics, and information on floods and droughts in Illinois.
Hydrologic conditions for North Dakota [More info]: Links by map location or station number to real-time stage and streamflow, real-time water quality, ground-water data, long-term hydrographs, and annual water-data reports to view and download for past and current water conditions in North Dakota.
Hydrologic conditions in Georgia, 2010 [More info]: Georgia has recently seen a lot of extreme weather events triggering widespread flooding. This summary of streamflow and discharge from selected locations shows graphically the conditions during 2010.
Hydrologic studies in Long Valley caldera [More info]: Hydrologic monitoring data for Long Valley caldera, California, on springs, streams, wells, fumaroles, and precipitation to study the natural hydrologic variations and the response of the hydrologic system to volcanic and tectonic processes.
Hydrologic studies in Oregon [More info]: Links to water data studies for river and lake basins in Oregon including ground water and water quality studies.
Hydrologic studies in the Upper Klamath Basin, Oregon [More info]: Overview of Klamath ecological research and links to USGS Klamath studies on ground water, nutrients, sediment oxygen demand, and fish response to water quality, sucker ecology, publications, bibliographies, and data.
Hydrologic unit maps [More info]: Overview of hydrologic unit maps adapted from USGS Water-Supply Paper 2294 giving description of hydrologic units, link to list of hydrologic units, paper maps and digital spatial data sets.
Hydrology of Johnson Creek Basin, a Mixed-Use Drainage Basin in the Portland, Oregon, Metropolitan Area [More info]: Study of a small stream that has had a history of persistent flooding and water-quality problems.
Identifying sources of fecal coliform bacteria in selected streams on Virginia's Total Maximum Daily Loads (TMDL) priority list [More info]: Describes project to identify sources of fecal coliform bacteria by ribotyping to develop the use of Maximum Daily Load (TMDL) values for contaminated stream segments in Virginia.
Impacts of Low-Flow and Stream-Temperature Changes on Endangered Atlantic Salmon - Current Research [More info]: Recent physical changes over time, including trends toward earlier snowmelt runoff, decreasing river ice, and increasing spring water temperatures, may affect salmon populations; we want to know how important these effects are.
In-Place Oil Shale Resources Underlying Federal Lands in the Piceance Basin, Western Colorado [More info]: We estimated an in-place oil shale resource of 1.07 trillion barrels under Federal mineral rights, or 70 percent of the total oil shale in place, in this area.
In-place oil shale resources examined by grade in the major basins of the Green River Formation, Colorado, Utah, and Wyoming [More info]: We estimated a total of 4.285 trillion barrels of oil in-place in the oil shale of this area using a geology-based assessment methodology.
Indiana hydroacoustics [More info]: Use of hydroacoustics by the USGS in Indiana to make streamflow measurements using Acoustic Doppler Current Profilers (ADCPs) and other hydroacoustic current meters.
Instantaneous Data Archive - IDA [More info]: The USGS collects continuous stage, discharge, and other instantaneous time-series data on the nations rivers. This Archive provides streamflow data and historical data, often several years worth.
Integrated Science: Florida Manatees and Everglades Hydrology [More info]: Description of research and monitoring work proposed for 2008 to combine hydrologic models with manatee distribution and movement models near and within Everglades National Park.
Integrated geologic, geochemical, and geophysical studies of Big Bend National Park, Texas [More info]: Coordinated studies of the effect of historical mining for mercury, origin and composition of metals in groundwaters and surface waters, history of volcanic and intrusive activity, and the complex geological history of this area.
Interagency Grizzly Bear Study Team (IGBST) [More info]: Description of research program for immediate and long-term management of grizzly bears (Ursus arctos horribilis) inhabiting the Greater Yellowstone Ecosystem. Includes links to reports in PDF format and cooperating organizations.
Interagency Hydrology Committee for Alaska [More info]: Information on the Interagency Hydrology Committee for Alaska, an organization of technical specialists at the federal, state, and local levels who are coordinating the collection and implementation of water resources related data in Alaska.
Invasive Species Program -- Snakeheads, aquatic invaders [More info]: Snakeheads, aggressive airbreathing freshwater fishes that are not native to North America, are considered injurious to certain native North American fish and other aquatic wildlife.
Invasive crayfish in the Pacific Northwest [More info]: These organisms have negative effects on local ecosystems, but we don't yet know how extensively they have spread. Here is a key to help people identify them.
Invasive species research [More info]: Links to research projects that will improve the ability to detect, monitor, and predict the effects of invasive species, including exotic animals, on native ecosystems of the Pacific Southwest (California, Nevada, Utah, and Arizona).
Inventory and protection of salt marshes from risks of sea-level rise at Acadia National Park, Maine [More info]: Will salt marshes survive if sea level rises quickly? The answer depends on whether the areas surrounding them can allow salt marsh fauna and flora to migrate there. Local topography, both natural and manmade, is the main factor limiting this migration.
Investigating White-Nose Syndrome in Bats [More info]: Explains the nature and history of this fungal infection that is killing large numbers of bats in the northeast US.
Investigating the Chesapeake Bay impact crater [More info]: Links to information on the formation and structure of Chesapeake Bay including online reports, recent field work, field work archives, cooperating agencies, bibliography, and links to articles about other terrestrial impact craters.
John Wesley Powell Center for Analysis and Synthesis [More info]: Interdisciplinary studies are facilitated by this assemblage of meeting space, human resources, and computing capabilities.
Johnson Creek basin hydrologic monitoring [More info]: Hydrologic data and analyses of surface-water, water quality, and ground water in the Johnson Creek basin in Oregon.
Joshua Tree National Park geology: on shaky ground [More info]: Description of earthquake that was felt in Joshua Tree region (1999) and links to earthquake summary, shaded relief map, aerial photos of the rupture zone, shaking intensity maps, damage reports, and seismograph network map.
Kansas drought watch [More info]: Drought map of Kansas link to real-time data for stream gaging stations and links to historic droughts of Kansas, ground water, drought definitions, and references.
Kansas flood watch [More info]: Flood map of Kansas link to real-time data for stream gaging stations and links to flood press releases, historic floods of Kansas, flood frequency data, photos, information on hydrology of floods, and flood hazard maps.
Kentucky District - program highlights [More info]: Brief descriptions of research programs in water resources in Kentucky with a few links to program websites. Programs include data collection projects, acid mine drainage, hydrodynamics, geology, waste site cleanup and hydrogeology.
Kilauea - eruption update and image archive [More info]: Current Kilauea eruption activity, updated daily with recent photos, maps, and deformation information and links to video for broadband users, photo glossary, and image archive.
Kilauea - perhaps the world's most active volcano [More info]: Current activity, hazards, and history of eruptions of Kilauea Volcano.
Kilauea--an Explosive Volcano in Hawaii [More info]: Explains how explosive eruptions occur here, shows the history of its eruptions, and describes the effects and hazards that accompany them.
Lake Pontchartrain basin: bottom sediments and related environmental resources [More info]: This publication focuses on the geological framework and sedimentary processes of the Lake Pontchartrain Basin and provides links to interactive tools, regional research, and sediment data in GIS formats for display and analysis.
Lake Roosevelt-Upper Columbia River environmental studies [More info]: Description of research studies of the Lake Roosavelt-Upper Columbia area on contaminants and effects on environmental health with links to publications and products, partners, related links, project summaries, and contacts.
Lake Tahoe Data Clearinghouse [More info]: This website is a gateway to information and data on Lake Tahoe with links to Lake Tahoe Initiative, geography, history, lake facts, GIS Data, DEM, DOQ, DLG imagery, bathymetry, satellite imagery, land cover, census, soils, pictures, and general maps.
Land Subsidence in the United States [More info]: Describes and provides several detiled examples of impacts of human-induced land subsidence resulting from the extraction of subsurface water, including aquifer-system compaction, drainage of organic soils, dissolution and collapse of susceptible rocks.
Land subsidence and aquifer-system compaction in the Tucson Active Management Area, south-central Arizona, 1987-2005 [More info]: Results of ground-surface monitoring and borehole water table measurements document subsidence of the land surface correlative with changes in the ground water.
Land use history of North America (LUHNA) [More info]: Report prepared with NASA on the importance of a historical context for understanding ongoing changes in land cover and land use in North America and the effect on the environment. Site contains primarily contents of a book edited by T.D. Sisk.
Land-cover change research at the U.S. Geological Survey-assessing our nation's dynamic land surface [More info]: Estimates of change in major types of land use and land cover from 1973 to 2000 should help model potential future change as climate, population, public policy, and technology change.
Land-use planning for nearshore ecosystem services--the Puget Sound Ecosystem Portfolio Model [More info]: Describes the types of concerns and observations used to help area resource managers analyze actual or potential changes in this highly developed ecosystem.
Landscape changes in the southwestern United States: techniques, long-term data sets, and trends [More info]: This study illustrates some approaches for reconstructing landscape change.
Landscape consequences of natural gas extraction in Allegheny and Susquehanna Counties, Pennsylvania, 2004--2010 [More info]: Quantifies the landscape changes and consequences of natural gas extraction by digitizing indications of disturbance on NAIP aerial photographs and using these with the NLCD to show land use-land cover change.
Landscape consequences of natural gas extraction in Bradford and Washington Counties, Pennsylvania, 2004-2010 [More info]: Quantifies the landscape changes and consequences of natural gas extraction by digitizing indications of disturbance on NAIP aerial photographs and using these with the NLCD to show land use-land cover change.
Landslide Hazards in the Seattle, Washington, Area [More info]: Explains how and why landslides occur in this area, and what can be done to forecast and mitigate them.
Latest earthquakes in the USA - Past 7 days [More info]: Real-time earthquake maps of the conterminous U.S., Alaska, Hawaii, and Puerto Rico displaying magnitude and location of earthquake activity in the past hour, past day, and past week.
Leetown Science Center [More info]: Homepage for the Leetown Science Center in West Virginia conducting research on aquatic and terrestrial organisms and their supporting ecosystems with links to directions, general description, library, projects, fact sheets, and facilities.
Lewis and Clark and the U.S. Geological Survey in North Dakota [More info]: Homepage linking the historic journey of Lewis and Clark and the research of the USGS in the same region with links to mapping history, remarkable points on the Missouri River, educational activities, photo gallery, and publications.
Limber pine communities [More info]: Report on status and trends of limber pine communities with references.
Locations and attributes of wind turbines in Colorado, 2009 [More info]: Data as of 2009, includes facility name, facility power capacity, number of turbines associated with each facility to date, facility developer, facility ownership, year the facility went online, and development status of wind facility.
Locations and attributes of wind turbines in New Mexico, 2009 [More info]: Data as of 2009, includes facility name, facility power capacity, number of turbines associated with each facility to date, facility developer, facility ownership, year the facility went online, and development status of wind facility.
Long Island Sound [More info]: Long Island Sound interactive map with GIS datasets and sonar imagery.
Long Island Sound sidescan sonar mosaics [More info]: Sidescan sonar image, surficial geologic interpretation, and bathymetry of the Long Island Sound sea floor.
Long Term Resource Monitoring Program (Upper Mississippi River area): sampling data [More info]: Downloadable data and other information about the sampling programs used in long-term monitoring of the upper Mississippi River area.
Louisiana HydroWatch [More info]: Homepage for the statewide real-time hydrologic monitoring network featuring the latest hydrologic information in Louisiana.
Louisiana coastal land loss [More info]: Homepage for Louisiana coastal land loss, including links to press release, animation of wetland loss, and PDF digital images of land change maps.
Louisiana continental slope [More info]: Louisiana continental slope interactive map with GIS datasets and sonar imagery.
Louisiana online water resources publications [More info]: Links to electronic publications on Louisiana water resources, some in PDF format, and link to bibliographies of electronic and paper publications.
Lower Columbia River dissolved gas monitoring network [More info]: Links to real-time data for total dissolved gas, temperature, and barometric pressure in lower Columbia River in Oregon and Washington and to project reports.
Macroinvertebrate and algal community sample collection methods and data collected at selected sites in the Eagle River watershed, Colorado, 2000-07 [More info]: Macroinvertebrate data collected by USGS or USFS from 73 sites from 2000 to 2007 and algal data collected from up to 26 sites between 2000 and 2001 in the Eagle River watershed, with emphasis on methods of sample collection and data processing.
Magnetic and gravity anomaly maps of West Virginia [More info]: Colored map in two parts and text in PDF files requiring Adobe Acrobat Reader 3.0 to view.
Maine Cooperative Snow Survey [More info]: The Maine Cooperative Snow Survey collects, interprets, and distributes information on the depth and water content of Maine's snowpack in the late winter and early spring, when the danger of flooding in Maine's rivers and streams is greatest.
Maine river ice monitoring system [More info]: The USGS in Augusta, Maine monitors river and ice conditions in areas of ice accumulation on the Kennebec River near Augusta providing real-time river stage data and real-time pictures of ice conditions at this location.
Major aquifers in New Jersey [More info]: Geologic description of the principal coastal and non-coastal aquifers in New Jersey and relationship to water quality and water supply.
Major drainage basins in Massachusetts and Rhode Island [More info]: Location and geology of drainage basins in Massachusetts and Rhode Island.
Major quake likely to strike San Francisco Bay Region between 2003 and 2032 [More info]: Study of the probability of a major earthquake in San Francisco Bay region with colored map and links to relevant publications. Text also available in PDF format and graphic available in Illustrator or Photoshop format.
Managing habitat for grassland birds: a guide for Wisconsin [More info]: Guide to identification, selection, and management of grassland habitats in Wisconsin to conserve the populations of grassland birds. Includes glossary, references, bird lists, graphs, and maps.
Mapping Partnership Office of Texas [More info]: Guide to the cooperative mapping programs in the state of Texas administered by the USGS Texas Mapping Partnership Office. Provides description of ongoing projects with links to USGS and cooperator datasets for the state of Texas.
Mapping grasslands suitable for cellulosic biofuels in the Greater Platte River Basin, United States [More info]: Study to identify grasslands that may be suitable for cellulosic feedstock production. Producing ethanol from non-cropland areas such as grassland will minimize the effects of biofuel developments on global food supplies.
Mapping perennial vegetation cover in the Mojave Desert [More info]: Field data and satellite images allow us to make a calibrated model of percent vegetation cover, which we can use to inform scientific investigations and land management efforts.
Mapping, monitoring, and modeling Western Gateway Community landscape dynamics [More info]: Geospatial analysis of factors affecting communities that are adjacent to Federal lands, especially those lands subject to varying public interest and visitation.
Maps On Demand: limited printing of digitally supported U.S. Geological Survey maps and reports [More info]: The USGS provides map-on-demand (MOD) printing for selected infrequently requested geologic and other theme map products providing high-quality paper-copy maps as needed. Site links to available map products with thumbnail views and how to order.
Maps of distribution and abundance of selected species of birds on uncultivated native upland grasslands and shrubsteppe in the northern Great Plains [More info]: Links to maps of breeding distributions of bird species on grasslands and shrublands in the northern Great Plains. Maps can also be downloaded from *.zip files in HTML format.
Maps of recent earthquake activity in California-Nevada [More info]: Near-real-time maps of location, ground motion, and shaking intensity of earthquakes in California and Nevada for the past hour, past day, and past week and links to other earthquake information.
Maps of the distribution and occurrence of ground water quality constituents and early 1970's land use in New Jersey [More info]: Links to maps of New Jersey showing nitrate levels, pesticides, Total Volatile Organic Compounds (VOCs), and radium in wells and land use of the 1970s.
Marin tsunami (video) [More info]: Guidelines for correct tsunami response and community preparedness from local emergency managers, first-responders, and leading experts on tsunami hazards and warnings.
Marine reserves and biological habitats: Monterey Bay, California [More info]: Brief description of the research program to inventory the natural resources of Monterey Bay National Marine Sanctuary with links to cruises, and publications and products, including an internet map server, imagery, and geologic descriptions.
Mass Wasting Following the 2002 Missionary Ridge Fire near Durango, Colorado, a Field Trip Guidebook [More info]: Guidebook with photos, maps, and diagrams explaining how forest fires have affected the likelihood of mass wasting, with discussions of steps taken to minimize future impacts.
Massachusetts and Rhode Island District home page [More info]: Home page for the Massachusetts and Rhode Island District office for water resources with links to drainage basins, water, stream statistics, projects, publications, news reports, and location.
Massachusetts and Rhode Island District projects [More info]: List of all Massachusetts and Rhode Island District water projects with links to those with homepages.
Massachusetts and Rhode Island District water data [More info]: Links to streamflow, surface and ground water, water quality, flood, drought, and precipitation data in real-time and for historic time periods for Massachusetts and Rhode Island.
Mauna Loa -- history, hazards and risk of living with the world's largest volcano [More info]: Describes volcano-related hazards on the Island of Hawaii, including lava flows, explosive eruptions, volcanic smog, damaging earthquakes, and tsunamis.
Mauna Loa current activity [More info]: Current activity of Mauna Loa Volcano with news, GPS data, electronic tiltmeter data, and current seismicity plus links to long term monitoring.
Mauna Loa, Earth's largest volcano [More info]: Current activity, hazards, and history of eruptions of Mauna Loa.
Mayflies of the United States [More info]: Links to checklists and species maps showing the distribution of mayflies in the United States with links to other information websites on mayflies and reference list.
Measuring human-induced land subsidence from space [More info]: Examples of the use of Satellite Interferometric Synthetic Aperture Radar to measure and map changes on the Earth's surface as an aid to understanding how ground-water pumping, hydrocarbon production, or other human activities cause land subsidence.
Mercury Concentrations in Streams Found to Go Through Daily Cycles [More info]: Research findings and examples of application to real problems--highly variable conditions cause the production of toxic methyl mercury in the environment which accumulates in fish.
Mercury Studies Team [More info]: Home page on hydrology studies on mercury, the most common contaminant of aquatic ecosystems, with links to general information, research team projects and data.
Mercury contamination of aquatic ecosystems [More info]: Fact sheet on mercury bioaccumulation and cycling in the environment. Also available in PDF format.
Mercury in the environment [More info]: Fact sheet on mercury and the environment, including toxic effects, risk to people and wildlife, sources of mercury, environments where methylmercury is a problem, and mercury contamination.
Methods for estimating concentrations and loads of selected constituents in tributaries to Lake Houston near Houston, Texas [More info]: Water from this reservoir will be used more extensively by the city, so we are developing methods of assessing the water quality in real time by measuring characteristics of stream flow that correlate with important water quality data.
Methods for estimating magnitude and frequency of floods in rural basins in the southeastern United States: South Carolina [More info]: Flood estimates are needed for the efficient design of bridges, highway embankments, levees, to protect lives and property in flood-prone areas, and to determine flood-insurance rates.
Methow River Basin [More info]: Description of studies conducted to evaluate the surface water, ground water, water interactions, and water quality of Methow River Basin in Washington. With links to related science topics, datasets, maps, project summaries, and news.
Michigan District - USGS Federal-State Cooperator Program [More info]: Links to websites of state, county and regional, township, municipal and tribal cooperators assisting with the funding and studies of the Michigan District research projects and data collection related to Michigan's water resources.
Michigan hydrologic summary [More info]: Links to websites providing data and information related to Michigan hydrology including droughts, floods, current water conditions, Great Lakes water levels, climatology, and weather.
Mid-Atlantic Federal Partners for the Environment (MAFPE) [More info]: Information on organization of federal agencies committed to conserving, managing, and protecting Mid-Atlantic region's natural resources.
Mineral Resources Program [More info]: Homepage of the Mineral Resources Program that provides current, impartial information on the occurrence, quality, quantity, and availability of mineral resources with links to projects, publications, spatial data, teams, issues, and news.
Mineral resources spatial data [More info]: Geochemical, geological, geophysical, mineral, and general reference spatial datasets that users can locate and download.
Minerals information [More info]: Statistics and information on worldwide supply, demand, and flow of minerals and materials essential to the U.S. economy, national security, and protection of the environment. Links to publications, recycling, and historical statistics.
Minnesota water-resources projects [More info]: Links to descriptions of research projects on water resources in Minnesota listed by project number.
Mississippi Fan internet map [More info]: Mississippi River alluvial fan interactive map with GIS data and imagery depicting core sites, depositional and channel interpretation, Gloria and SeaMarc datasets.
Mississippi River flood: April 2001 [More info]: A large collection of photographs showing the historic flooding of the upper Mississippi River near LaCrosse, Wisconsin and points south during April of 2001. Includes video footage as well.
Missouri District Surface-Water Data & Analysis Section [More info]: Overview of the Surface-Water Data & Analysis Section of the Missouri District with links to real-time and historic water data, staff members, and projects on bridge scour and gaging station network.
Missouri District Water-Quality Data & Analysis Section [More info]: Homepage for the Missouri District Water-Quality Data & Analysis Section with links to data networks, projects, data availability, mobile laboratories, sampling boat, quality assurance practices, and real-time water-quality data.
Missouri River InfoLink: a clearinghouse of Missouri River information [More info]: Portal for Missouri River Infolinks, a clearinghouse to multiple links giving Missouri information, photo gallery, river weather forecast, projects and features, maps, meetings, history, and science research.
Missouri River streamflow-gaging station, Bismarck, North Dakota [More info]: Description of the North Dakota stream-gaging program using a Missouri River streamflow-gaging station in Bismarck, North Dakota as an example explaining how and why the USGS collects stream data with photos and directions for visiting the station.
Modeling Climate Change and Sturgeon Populations in the Missouri River [More info]: Research to address effects of climate change on sturgeon population dynamics.
Monitoring and analysis of sand dune movement and growth on the Navajo Nation, southwestern United States [More info]: We combine long-term records from aerial photographs, detailed mapping using survey-grade GPS, and ground-based lidar with meteorological monitoring. Sand dune migration rates are currently about 35 meters per year.
Monitoring data of the Long Valley caldera and Mono-Inyo Craters volcanic chain, California [More info]: Describes the monitoring effort and provides real-time data of the current restless activity of the caldera, including earthquakes, ground deformation, and release of volcanic gas and plus link to volcano monitoring techniques.
Monitoring for Pesticides in Groundwater and Surface Water in Nevada, 2008 [More info]: Study of pesticides in shallow groundwater and surface water to help decision makers evaluate and manage pesticide application practices to protect drinking water resources, especially deeper, potable groundwater as well as aquatic species.
Monitoring grizzly bear populations using DNA [More info]: Description of project monitoring the status of Greater Glacier National Park Area's grizzly bear and black bear populations using genetic techniques on DNA from bear hair or scats without handling bears, with photos and discussion of methods.
Monitoring program for mercury in precipitation in Indiana [More info]: Precipitation-monitoring network for mercury in Indiana.
Most recent updates for U.S. volcanoes [More info]: Short descriptions of recent volcanic activity in the US.
Mount Rainier - Living Safely With a Volcano in Your Backyard [More info]: One of our Nation's most dangerous volcanoes, Mount Rainier has been the source of countless eruptions and volcanic mudflows, and many people live in the areas that will be affected by it.
Mount St. Helens lidar [More info]: Poster available in two sizes for downloading and printing.
Mount St. Helens, 1980 to now--what's going on? [More info]: Summarizes the eruptions of this spectacular volcano and the consequences for the surrounding landscape, explains how volcanoes like this form, and how we monitor their activity to mitigate hazards they pose.
Multibeam data and socio-economic issues in west-central San Francisco Bay [More info]: Webpage based on USGS Open File Report 98-139 links to information on the San Francisco Bay estuary to study dredge disposal effects, fish habitats, sediment transport, rock pinnacles and navigation, and consequences of a large oil spill.
Multielement geochemical dataset of surficial materials for the northern Great Basin [More info]: This report presents geochemical data generated during mineral and environmental assessments for the Bureau of Land Management in northern Nevada, northeastern California, southeastern Oregon, and southwestern Idaho, along with metadata and maps.
NPElement: A database of lichen elemental concentrations in the U.S. national parks [More info]: Database providing concentration of heavy metals, nutrients, and trace elements in 75 species of lichens sampled in 43 national park units in 24 states.
NPLichen: A database of lichens in the U.S. national parks [More info]: Web interface for a database of documented occurrences of lichens in units of the U. S. National Park System. The records were obtained from the scientific literature, from National Park Service reports, and from selected herbaria.
Nahcolite Resources in the Green River Formation, Piceance Basin, Northwestern Colorado [More info]: Resource assessment of nahcolite, a mineral with a variety of industrial uses, which occurs with oil shale and is affected by the processes used to recover hydrocarbons from the rock.
National Assessment of Shoreline Change Project [More info]: The Coastal and Marine Geology Program of the U.S. Geological Survey (USGS) is conducting an analysis of historical shoreline changes along open-ocean sandy shores of the conterminous United States and parts of Alaska and Hawaii.
National Coal Assessment [More info]: The USGS National Coal Assessment provides a quantitative study of the nation's coal endowment. Links to digital publications with maps for the Illinois Basin, Colorado, Arizona, Utah, and New Mexico, and Wyoming, Montana, and North Dakota.
National Coal Resource Assessment: Geologic assessment of coal in the Colorado Plateau: Arizona, New Mexico, and Utah [More info]: Coal resources, stratigraphy, geochemistry, coal quality and geology of coal in the Colorado Plateau, Arizona, New Mexico and Utah. Text in PDF format and available on CD-ROM.
National Coal Resources Data System - US Coal Quality Database [More info]: Searchable database, the COALQUAL database, presented here and in the USGS Open-file Report 97-134, is a subset of samples contained in the NCRDS (National Coal Resources Data System) database, and contains coal quality data on each sample.
National Coal Resources Data System - US Coal Resource Database (USGCOAL) [More info]: Searchable database for locating information on coal resources by area, coalfield, coalbed, rank, quadrangle, source, years, or characteristics of thickness, overburden, and reliability.
National Cooperative Geologic Mapping Program [More info]: Geological mapping carried out by USGS in close cooperation with state, university, and federal partners. Includes general information about geological maps and mapping standards.
National Hydrography Dataset (NHD) [More info]: Main page for National Hydrography Dataset (NHD), a comprehensive set of digital spatial data about surface water features, with links to references, data, software tools, applications, tutorials, technical support, and data maintenance.
National Oil and Gas Assessment [More info]: Links to oil and gas assessment maps of major basins in the United States and to related publications, and products.
National Petroleum Reserve Alaska Legacy Data Archive [More info]: Access is provided to seismic data, image files of seismic data, well logs, and cores of petroleum reserves in Alaska from the National Petroleum Reserve, Alaska, and (NPRA) Legacy Data Archive.
National Research Program (NRP) for water resources [More info]: The USGS National Research Program for water resources supports hydrologic research in support of the mission of the U.S. Geological Survey. Site provides links to search for current projects and for postdoctoral opportunities.
National Stream Quality Accounting Network (NASQAN) [More info]: Homepage for description of the National Stream Quality Network (NASQAN), a long-term program monitoring the concentrations and flux of sediment and chemicals in the Nation's largest rivers (Mississippi, Columbia, Colorado, Rio Grande, and Yukon).
National Streamflow Information Program [More info]: National Streamflow Information Program home page describing the operation and maintenance of 7000 streamgages, overview of the program, system for collection of streamflow data, maintaining of historic streamflow data, and available reports.
National Water Information System (NWISWeb) data for Illinois [More info]: National Information Water System (NWIS) water data for Illinois including real-time current conditions, streamflow data, site information, ground-water data, and water-quality data.
National Water Information System (NWISWeb) data for the Nation [More info]: NWISWeb homepage for the National Water Information System providing access to water-resources data collected at approximately 1.5 million sites in all 50 States, the District of Columbia, and Puerto Rico.
National Water Quality Assessment urban studies portal [More info]: Multiple studies addressing urban water-quality issues, to describe biological, chemical, and physical characteristics of urban water resources over time, and relate those characteristics to natural processes and human activities
National Water-Quality Assessment (NAWQA) Program [More info]: Primary homepage for the National Water Quality Assessment (NAWQA) Program studying water quality in river, aquifer and coastal water basins throughout the nation. Links to reports, data, models, maps and national synthesis studies.
National Water-Quality Assessment (NAWQA) Program - Great and Little Miami River Basins [More info]: The Great and Little Miami River Basins form a National Water Quality Assessment (NAWQA) Program study unit for studying the status, trends, and changes affecting the nation's water quality. Site links to data, publications, maps, and results.
National Water-Quality Assessment (NAWQA) Program - Water quality in the Puget Sound Basin [More info]: The Puget Sound Basin is a National Water Quality Assessment (NAWQA) Program study unit for studying the status, trends, and changes affecting the nation's water quality. Site links to data, publications, and results.
National Water-Quality Assessment data warehouse [More info]: Data warehouse for national water quality program with links to chemical, biological, and physical data for water, sediment and animal tissues, nutrient, pesticide, and VOC levels, streamflow, and ground water levels from national study units.
National analysis of trace elements in ground water, streams, stream and reservoir sediment, and fish and clam tissue across the United States [More info]: Trace elements are inorganic chemicals occurring in small amounts in nature. This web site of the National Water Quality Assessment links to U.S. data, publications, news, and other sites on trace metals, metalloids and radionuclides in water.
National assessment of coastal vulnerability to sea-level rise: preliminary results for the U.S. Pacific Coast [More info]: Report on the potential of coastal change due to future sea level rise using the coastal vulnerability index (C.V.I.) with two regional examples in San Francisco and Monterey Bay and Tillamook Head, Oregon, to Ocean Shores, WA.
National assessment of coastal vulnerability to sea-level rise: preliminary results of the U.S. Atlantic coast [More info]: Brief report on map showing the relative vulnerability of the Atlantic coast to changes due to future rise in sea level. Includes links to similar maps in Open-file report 2000-178 on the Pacific Coast and 2000-179 on the Gulf of Mexico Coast.
National assessment of volatile organic chemicals (VOCs) in water resources of the United States [More info]: Links to online data retrieval, information on MTBE and gasoline oxygenates, VOCs analysis, VOC publications, news features, and featured online publications.
National geologic studies of benthic habitats, northeastern United States : Stellwagen Bank National Marine Sanctuary Region off Boston, Massachusetts [More info]: Geological research of the Stellwagen Bank National Marine Sanctuary sea floor are presented in the form of maps, posters, fact sheets, sonar images, and bottom photographs.
National land cover characterization [More info]: Homepage for the National Land Cover Data (NLCD), a land cover classification scheme, for the United States based on data derived from Landsat Thematic Mapper satellite data. Includes links to description, products, accuracy, and program partners.
National water conditions [More info]: Historical maps and animations of maps for monthly and annual streamflow conditions by water year showing generalized contour patterns of streamflow conditions. Maps are for the United States, Canada, and Puerto Rico.
Nationalatlas.gov - National Atlas of the United States [More info]: Portal to general information on the National Atlas of the United States with access for producing specialized maps and links to thematic maps including interactive maps, multimedia maps, map layers data warehouse, wall maps, and printable maps.
Natural and human drivers of biodiversity in the Greater Yellowstone ecosystem [More info]: This study reconstructs past interactions among ecosystem factors, native species, and human land use in the Greater Yellowstone ecosystem to provide a context for future management to sustain both ecological and human communities.
Natural oil and gas seeps in California [More info]: Distribution and characteristics of natural oil and gas seeps in California, including processes of formation and effects on the environment; with discussion of tar pits and asphaltum.
Nearshore Benthic Habitat Project [More info]: Homepage for the Nearshore Benthic Habitats Project for mapping geophysical characterization of the coastal sea floor to identify benthic fish and shellfish habitat with links to research cruises and preliminary results.
Net Ecosystem Production (NEP) of the Great Plains, United States [More info]: Geographic analysis of the changes in storage and release of carbon in this large area as land use patterns, especially agriculture, have changed.
Nevada Water Science Center Projects [More info]: Links to detailed descriptions of USGS water-related research projects in Nevada with project information, location maps, and bibliographies including online reports.
New England states aeromagnetic and gravity maps and data [More info]: Aeromagnetic surveys of New England, merged to form seamless grids across the state. Gravity anomaly data are provided as well. Data provided in a variety of formats.
New Jersey District - ground water information [More info]: Links to New Jersey ground-water data including hydrogeology with a geologic map and description of major aquifers, water levels including real-time data and drought levels, and water-quality information.
New Jersey District - surface water information [More info]: Links to water data for New Jersey including streamflow, sampling stations, and water-quality data with links to reports on stream gages, hydrology, networks, and floods.
New Jersey National Water-Quality Assessment (NAWQA) homepage [More info]: Brief discussion of two water quality studies in the state of New Jersey with links to the Long-Island-New York Coastal Drainages study unit and the Delaware River Basin study unit.
New Jersey Tide Telemetry System [More info]: A network of tide gages and weather stations is deployed in coastal areas across the state to help forecast floods and support timely evacuation of people from affected areas.
New Jersey drought watch [More info]: Update on daily streamflow conditions and drought situation in New Jersey.
New Jersey ground-water level observation wells [More info]: Site for ground water level data and additional information for New Jersey wells in the most important aquifers in New Jersey. Links to well stations are grouped by county and township giving access to hydrographs and data.
New Mexico District - cooperating agencies [More info]: Collecting water-resources data and conducting interpretive hydrologic investigations are accomplished in cooperation with local, tribal, State, and Federal agencies. Links are to agencies cooperating with the New Mexico District.
New York State pesticide monitoring homepage [More info]: Data on presence and distribution of pesticides in surface and ground water of New York State.
New York state current studies and research [More info]: Links to summaries of USGS studies and research on water resources in the state of New York arranged by project number.
Nitrate concentrations and potential sources in the Barton Springs segment of the Edwards aquifer and its contributing zone, Central Texas [More info]: The area contributing recharge to this aquifer is undergoing rapid growth, generating more wastewater. We found that nitrate, a major component of wastewater and a nutrient that can degrade water quality, has increased in the creeks in this area.
Nitrate in ground water near La Pine, Oregon [More info]: Description of project studying hydrologic and chemical processes that affect the movement and fate of nitrogen within the shallow aquifers of the La Pine region of central Oregon.
Noninvasive methods for monitoring bear population trends [More info]: We estimate population growth rates by collecting hair at natural bear rubs along trails, roads, and fence and power lines, and analyzing the DNA from the hair.
North American Amphibian Monitoring Program (NAAMP) [More info]: The North American Amphibian Monitoring Program (NAAMP) is a long-term monitoring program designed to track the status and trends of frog and toad populations with links to data access, protocol, and how to volunteer as an observer.
North American Breeding Bird Survey (BBS) [More info]: North American Breeding Bird Survey (BBS) is a cooperative program that monitors the status and trends of North American bird populations. Includes files of results, analyses, route collection maps and raw data.
North Cascades National Park geology, a mountain mosaic [More info]: Homepage for information on geology of the North Cascades National Park in the state of Washington. Includes links to geologic story, geologic field trips, geologic maps, plate tectonics, rocks and minerals, geologic time, and glossary.
North Dakota River Basin map for current streamflow conditions [More info]: Links by geographic area in North Dakota or by gaging station number to hydrographs, downloadable data, and site description of streamflow stations.
North Dakota furtakers: educational manual [More info]: Trapping education manual for the beginning or inexperienced trapper intended to provide information on North Dakota's predators and furbearing animals and the basics on how to trap them using good trapping skills and sound fur management.
Northern Appalachian Field Branch, Leetown Science Center [More info]: Description of scientific focus and research at the Northern Appalachian Field Lab on mining land use impacts and mediation, aquatic ecology, effects of dam removal, and invasive plant and animal species.
Northern Divide Grizzly Bear Project [More info]: Project to assess the grizzly bear population size, trend, and survival in the Northern Continental Divide Ecosystem (NCDE) in Montana to improve the long-term survival for this threatened species. With description, DNA identification means and photos.
Northern Gulf of Mexico ecosystem change and hazard susceptibility [More info]: Map interfaces and data in the area offshore Louisiana, Mississippi, and Alabama which was affected most by hurricane Katrina and, more recently, the oil spill.
Northern Rocky Mountain Science Center [More info]: Northern Rocky Mountain Science Center (NRMSC) based at Bozeman, Montana conducts research to help natural resources management in the Northern Rocky Mountains with field stations at West Glacier and Missoula. Links to staff, programs, and partners.
Nutrients National Synthesis Project: nutrients in rivers, streams, and aquifers in the United States [More info]: This Nutrients National Synthesis Project site on the U.S. study of nutrients, especially nitrogen and phosphorus, as contaminants in high concentrations links to an overview, study team, featured reports, publications, and national datasets.
Occurrence of Emerging Contaminants in Water and Bed Material in the Missouri River, North Dakota, 2007 [More info]: Water monitoring results, focused on wastewater compounds, human-health pharmaceutical compounds, hormones, and antibiotics in water, and waste indicators, hormones, and antibiotics in solids.
Occurrence of Escherichia coli in the Cuyahoga River in the Cuyahoga Valley National Park, Ohio [More info]: Explains how this important indicator bacteria is used to detect problems in the water supply that may affect human health, focusing on a specific recreational area.
Occurrence of selected radionuclides in ground water used for drinking water in the United States [More info]: Results (*.pdf) of a 1998 targeted reconnaissance survey on the sources of radium, polonium, and lead radionuclides, data collection and laboratory methods, existing occurrences in drinking water, risk assessments, and compliance monitoring.
Occurrence, distribution, and concentrations of selected contaminants in streambed- and suspended-sediment samples collected in Bexar County, Texas, 2007-09 [More info]: Study showing which chemicals found in sediments were most common, with methods used and likely consequences of their high concentrations.
Oceanographic time series data [More info]: Oceanographic time-series data obtained from moored instruments, generally provided in NetCDF format.
Oculina Bank - geology of a deep-water coral reef habitat off Florida [More info]: Brief report on sidescan sonar data, sediment sampling, and submersible and video photography studies of destruction of deep-water coral pinnacles where fish spawn off east-central Florida in the Oculina Bank in order to restore and protect the habitat.
Office of the Delaware River Master (ODRM) [More info]: This web site is intended to provide the user with general information on the Office of the Delaware River Master and with timely access to the data and information collected and disseminated by the Office.
Ohio District - list of cooperators [More info]: Links to web pages of state, local, and federal agencies supporting water-resources investigations in cooperation with the USGS in Ohio.
Ohio District's Microbiology Program [More info]: Overview of microbiology projects related to water quality investigating bacteria, viral and protozoan pathogens and indicators in the environment with links to publications, analytical and field methods, laboratory, and current projects.
Ohio Gap Analysis Project [More info]: Information on the Gap Analysis Program in Ohio, a geographic approach to planning for biological diversity by mapping native aquatic and terrestrial animal species and natural communities on present-day conservation lands.
Oklahoma District - list of cooperators [More info]: List of cooperating agencies and institutions that partner with the USGS in studies related to water resources and hydrology in Oklahoma.
Oklahoma Geographic Information Systems (GIS) data [More info]: Access to GIS geospatial datasets for Oklahoma and the United States for Geographic Information Systems (GIS) applications.
Online assessment of hydrologic conditions in Texas [More info]: Brief summaries of USGS projects in Texas including water quality monitoring, digital mapping, energy resources, U.S.-Mexico border mapping, fish and wildlife health, Kemp's Ridley sea turtle, and conditions affecting water quality.
Online guide to the continental Cretaceous-Tertiary boundary in the Raton basin, Colorado and New Mexico [More info]: Field guide describing the geology and paleontology of the continental Cretaceous-Tertiary boundary in the Raton basin, Colorado and New Mexico.
Organic Compounds in Clackamas River Water Used for Public Supply near Portland, Oregon, 2003-05 [More info]: In all, 56 compounds were detected in samples collected approximately monthly during 2003-05 at the intake for the Clackamas River Water plant. On the basis of this screening-level assessment, adverse effects to human health are assumed to be negligible.
Organic compounds assessed in Neuse River water used for public supply near Smithfield, North Carolina, 2002-2005 [More info]: Reports concentration of organic compounds here, to serve as a baseline against which future measurements can be compared and to provide a general assessment of the quality of local water treatment efforts.
Organic compounds in Elm Fork Trinity river water used for public supply near Carrollton, Texas, 2002-05 [More info]: We identified six compounds at concentrations less than human-health benchmarks, but within a factor of 10 of those limits. Those compounds might warrant further study to understand their transport and fate within the watershed.
Organic compounds in Running Gutter Brook water used for public supply near Hatfield, Massachusetts, 2003-05 [More info]: The 258 organic compounds in this assessment are man-made: pesticides, solvents, gasoline hydrocarbons, personal-care and domestic-use products, pavement and combustion-derived compounds. None were found in concentrations deemed dangerous at this time.
Organic compounds in Truckee River water used for public supply near Reno, Nevada, 2002-05 [More info]: A preliminary indication of the potential importance of compounds detected in source water to the quality of finished water prior to distribution.
Organic compounds in White River water used for public supply near Indianapolis, Indiana, 2002-05 [More info]: Measured concentrations of many compounds in water people use. Some compounds are regulated as health hazards; a few of these were over the benchmark limits. Others may become issues of concern, so studies such as this give us helpful background levels.
Organic metamorphism in the California petroleum basins: Chapter A - ROCK-EVAL and vitrinite reflectance [More info]: Part A of a complex report on the results of ROCK-EVAL and vitrinite reflectance analysis of a large sample base from more than 70 wells located in three oil-rich California petroleum basins in order to study the formation of oil deposits.
Organic metamorphism in the California petroleum basins: Chapter B - Insights from extractable bitumen and saturated hydrocarbons [More info]: Part B of a complex report on the results of geochemical analysis of 75 shale samples from the Los Angeles, Ventura, and San Joaquin Basins to gather observations relevant to exploration regarding the formation of oil deposits in these basins.
Ospreys in Oregon and the Pacific Northwest [More info]: Fact sheet in Adobe PDF about ospreys in Oregon and the Pacific Northwest
Our dynamic desert landscape [More info]: Overview of studies of fragile and active landscape of the American Southwest deserts, including projects on geologic mapping, surface processes, remote sensing research, ecological processes, and earthquake hazard applications.
Outdoor water use and water conservation opportunities in Virginia Beach, Virginia [More info]: How much water do you use to water your lawn, wash your car, or fill your swimming pool? Your answers to these questions have important implications for water supplies. A survey in this area showed the types of users and the ways in which water is used.
Pacific Island Ecosystems Research Center [More info]: Geographical isolation of the Hawaiian Islands has resulted in the evolution of endemic species unique in the world. Research at the Center aims at preventing the further extinction of these species. Links to projects, publications and other data.
Pacific Northwest geologic mapping and urban hazards [More info]: Description of research underway in the Pacific Northwest including geologic mapping and urban hazards studies with links to geologic maps, publications, and data.
Pacific Seafloor Mapping Project [More info]: Homepage for the Pacific Sea floor Mapping Project with links to images, downloadable data, applications, fly-by movies, products, publications, and contacts for studies of San Francisco Bay, Puget Sound, Lake Tahoe, and other Pacific areas.
Pathways of metal transfer from mineralized sources to bioreceptors [More info]: A synthesis of the Mineral Resources Program's past and future research directions in the western U.S. on metal contamination due to mineral deposits and mining and the environmental effects on living organisms. Chapters 1, 4, and 6 as PDF files.
Patuxent plant list and herbarium collection [More info]: List of plant specimens and photo gallery of plants in the collection of the herbarium at the Patuxent Wildlife Research Center, a reference collection of plants occurring in the area lying between Baltimore, Maryland and Washington D.C.
Pennsylvania downloadable spatial data (GIS data files) [More info]: Pennsylvania digital data for watershed boundaries, county geology, and flood mapping in Arc/Info format compressed with gzip utility for downloading plus links to other sources of data.
Pennsylvania fractured rock hydrology research [More info]: Links to reports for Pennsylvania on borehole geophysical studies, aquifer tests and properties, modeling, and hydrologic effects of an earthquake with links to MOC3D solute transport software package, program mission, and bibliography.
Pesticide National Synthesis Project: national assessment of pesticides in streams, rivers, and ground water of the United States [More info]: An assessment of pesticides in national water resources, with links to national reports, national statistics, national data, pesticide use, analytical strategy, and standards for the U.S.
Pesticides in Ground Water of Wyoming, 1995-2006 [More info]: Summarizes ground-water pesticide monitoring results, shows vulnerability of aquifers to contamination.
Pesticides in Wyoming's rivers, 2006-10 [More info]: Sampling for pesticide contamination in four major rivers in in the Bighorn and North Platte River Basins, begun in 2006 and resampled in 2009 and 2010 revealed concentration at levels below the standards for drinking water.
Phage therapy for Florida corals? [More info]: Explains how some diseases affecting corals might be countered by viruses that infect disease-causing bacteria.
Pharmaceuticals, Hormones, and Other Organic Wastewater Contaminants in U.S. Streams [More info]: Describes and illustrates that a broad range of chemicals found in residential, industrial, and agricultural wastewaters commonly occur in mixtures at low concentrations downstream from areas of intense urbanization and animal production.
Photo gallery of the Long Valley area, California [More info]: Selection of photographic images of the Long Valley area that illustrate the consequences of the past geologic history of the Sierra Nevada, Long Valley Caldera, the Mono-Inyo Craters volcanic chain, glaciation, and faulting.
Photographs and videos from the Upper Midwest Ecological Science Center [More info]: Aerial photography for the Upper Mississippi River System (UMRS). Mosaics of 2000 UMRS aerial photos, 1997 oblique photos collected between Minneapolis and the Gulf of Mexico, and 1994 UMRS color infrared aerial photos.
Photographs of the Picher Mining District (Ottawa County, Oklahoma) [More info]: Description and photos related to the Picher Mining District in Oklahoma, once a primary U.S. source of lead and zinc and now the largest superfund site in the U.S. with millions of cubic yards of mine tailings (locally known as "chat") remaining.
Pikes Peak, Colorado [More info]: Printable poster commemorating the 200th anniversary of Zebulon M. Pike's first sighting of the iconic peak bearing his name.
Plague [More info]: History, pathology, and prospects for this historic disease that is still prevalent in animals and remains a threat to humans.
Platte River Program, a USGS Place-Based Studies Program [More info]: Site for the Platte River Program in Nebraska an area that is a critical staging area for migratory waterbirds of the Central Flyway. Includes links to color-infrared aerial photos, 1938 historic aerial photos, and Cottonwood Ranch research site.
Polar Bear research at the Alaska Science Center [More info]: Ecological studies of polar bears including population dynamics, dependence on sea ice, and tracking methods.
Popular myths about flooding in Western Washington [More info]: The so-called "100-year" flood is really more like the 4 ½ year flood. This can help emergency managers enhance public awareness of how often flooding truly occurs in a region. It also could help convince those people in harm's way that preparedness is m
Possible effects of groundwater pumping on surface water in the Verde Valley, Arizona [More info]: We applied a groundwater model to simulate effects of groundwater pumping and artificial recharge on surface water in this area. Results show effects of pumping or recharge on streamflow.
Potential environmental impacts of quarrying stones in karst - a literature review [More info]: This report is the result of an extensive literature search to determine the state-of-the-knowledge regarding environmental impacts from quarrying carbonate rocks in karst formations to better use of karst resources in sustainable ways.
Potential hazards from future volcanic eruptions in the Long Valley -- Mono Lake Area, California [More info]: An introduction to the volcano hazards in the Long Valley area based on the past geologic history of the Long Valley Caldera and the Mono-Inyo Craters volcanic chain.
Preliminary geologic map of the Santa Barbara coastal plain area, Santa Barbara County, California [More info]: A geologic map of the Santa Barbara coastal plain region in PDF format with data in GIS format (ArcInfo export, shapefile, and TIFF)
Presettlement and contemporary vegetation patterns along two navigation reaches of the Upper Mississippi River [More info]: Study to reconstruct presettlement vegetation patterns along two navigation reaches of the Upper Mississippi.
Priority ecosystem studies initiative [More info]: Description of the priority ecosystems studies initiative with links to projects in Chesapeake Bay, Greater Yellowstone, Mojave Desert, Platte River, Salton Sea, San Francisco, and south Florida.
Protecting the Nation's coral reefs [More info]: Report on problems in preserving coral reef ecosystems with links to information on the interagency U.S. Coral Reef Task Force, press releases, reports, and NOAA coral reef sites.
Publications of the Massachusetts and Rhode Island District [More info]: Lists of publications of the Massachusetts and Rhode Island District on water resources with links to online publications.
Putting down roots in earthquake country: Your handbook for the San Francisco Bay region [More info]: If you live or work in the San Francisco Bay region, this handbook explains why you should be concerned with earthquakes, what you can expect during and after a quake, and what you need to do beforehand to be safe and reduce property damage.
Quadrangle indexes [More info]: GIS data files containing approximate boundaries of the various USGS quadrangles, with names and indexing codes associated with each quadrangle.
Quantifying effects of climate change on the snowmelt-dominated groundwater resources of northern New England [More info]: Planned analysis of the sensitivity of groundwater levels to changes in air temperature and precipitation. Changes in groundwater recharge and discharge also will be correlated with other hydrologic indicators.
Radio tracking manatees to assess the impact of hydrologic changes in southwest Florida [More info]: Report on the Sirenia Project use of a radio tracking study to determine manatee movement patterns and habitat to develop ecological models to understand and predict the effects of hydrologic restoration on manatees in Southwest Florida.
Radon in earth, air, and water [More info]: Links to USGS publications, bibliographies, and maps on radon in the U.S., plus links to non-USGS sites with information on radon.
Real-time flood alert system for Puerto Rico [More info]: Web-based analytical facility designed to integrate data relevant to flood emergencies in Puerto Rico.
Real-time precipitation data for Illinois [More info]: Access to real-time precipitation data for Illinois.
Real-time seismic monitoring of instrumented hospital buildings [More info]: Specialized monitoring systems installed in a VA hospital in Memphis, TN will help us to design safer hospitals and other buildings and to prevent loss of life in this and similar earthquake-prone areas.
Real-time seismogram displays [More info]: Description of seismograms and how they are produced by drum recorders and electronic instruments with real-time seismograms for Northern California and Long Valley, California and representative seismograms for types of earthquake activity.
Real-time water data for Alabama [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Alaska [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Arizona [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Arkansas [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for California [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Colorado [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Connecticut [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Delaware [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for District of Columbia [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Florida [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Georgia [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Hawaii [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Idaho [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Illinois [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Indiana [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Iowa [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Kansas [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Kentucky [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Louisiana [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Maine [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Maryland [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Massachusetts [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Michigan [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Minnesota [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Mississippi [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Missouri [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Montana [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Nebraska [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Nevada [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for New Hampshire [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for New Jersey [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for New Mexico [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for New York [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for North Carolina [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for North Dakota [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Ohio [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Oklahoma [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Oregon [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Pennsylvania [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Rhode Island [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for South Carolina [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for South Dakota [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Tennessee [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Texas [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Utah [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Vermont [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Virginia [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Washington [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for West Virginia [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Wisconsin [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water data for Wyoming [More info]: Consistent, real-time water data from streams, lakes, reservoirs, ground-water, and meteorological sites, are available from the USGS National Water Information System as graphs, tables, or files to download.
Real-time water levels for reservoirs in Puerto Rico [More info]: Links to stations in Puerto Rico for real-time information on water levels for reservoirs.
Real-time water-quality monitoring and regression analysis to estimate nutrient and bacteria concentration in Kansas streams. [More info]: Report on the use of regression equations from measurements made by water quality monitors and analytical results of manually collected samples estimating nutrient, bacteria, and other constituent concentrations to study streams in Kansas.
Recent changes in the food web of Lake Erie - the role of phosphorus and zebra mussels [More info]: Brief overview of the proliferation of zebra mussels and the role of phosphorus in Lake Erie with links to publications related to Lake Erie water quality.
Recent earthquakes in Hawaii [More info]: Interactive maps of earthquakes of last 2 hours, last 2 days, and last 2 weeks in Hawaii.
Recent news releases from the Wyoming District [More info]: News releases from Wyoming District on Wyoming water conditions.
Recommended methods for range-wide monitoring of prairie dogs in the United States [More info]: One of the greatest challenges for conserving grassland, prairie scrub, and shrub-steppe ecosystems is maintaining prairie dog populations across the landscape. Of the four species of prairie dogs found in the United States, the Utah prairie dog (Cynomys
Recoverability and vulnerability of desert ecosystems [More info]: Research results (publications, photographs, maps) on ecological processes within the Mojave Desert Ecosystem to provide land managers with scientific understanding and tools needed to conserve and restore threatened desert landscapes.
Red-Rimmed Melania (Melanoides tuberculatus) - A Snail in Biscayne National Park, Florida - Harmful Invader or Just a Nuisance? [More info]: Explains how this potentially harmful invasive species arrived, why we are concerned, where in the area it is found, what environmental factors control its spread, and what might be done in response.
Regional assessments of the Nation's water quality--Improved understanding of stream nutrient sources through enhanced modeling capabilities [More info]: Studies of the sources, transport, and fate of nutrients in the streams of six major regions of the conterminous United States.
Regional climate change--Science in the Southeast [More info]: Research projects intended to create regional and national data that conform to conditions predicted by general circulation models, so that land and wildlife managers can understand the likely consequences of climatic changes in their areas of study.
Relations among geology, physiography, land use, and stream habitat conditions in the Buffalo and Current River systems, Missouri and Arkansas [More info]
Relations among land cover, streamflow, and water quality in the North Canadian River Basin near Oklahoma City, Oklahoma: 1968-2009 [More info]: Data explains spatial differences and temporal trends in water quality, specifically dissolved oxygen, nitrogen and phosphorus concentrations.
Remaining recoverable petroleum in giant oil fields of the Los Angeles Basin, southern California [More info]: We estimated between 3.2 and 5.6 billion barrels of additional oil may be recovered with existing technology in this area using a probabilistic geology-based assessment methodology.
Remote video monitoring [More info]: Links to remote video monitoring field stations with video and water level data, plus links to image processing software tools, processed video examples, and other uses of video descriptions.
Reservoir sediment studies in Kansas [More info]: Report of completed reservoir sediment studies in Kansas using a combination of bathymetric surveying, sediment coring, chemical analysis, and statistical analysis to understand the quantity and quality of deposited sediment.
Response of Florida shelf ecosystems to climate change: from macro to micro scales [More info]: Study of the effects of ocean acidification on regional carbonate processes, changes in individual estuaries, and organism-level response.
Response of lake chemistry to atmospheric deposition and climate in selected Class I wilderness areas in the western United States, 1993-2009 [More info]: Sulfate deposition to high-elevation areas has decreased here as a result of reductions in SO2 emissions. Nitrate deposition did not change, whereas ammonium deposition increased, particularly at sites near urban and agricultural areas.
Riding the storm -- landslide danger in the San Francisco Bay Area [More info]: Video: Learn what USGS scientists have discovered about landslide dynamics and which slopes are most susceptible to sliding. Hear the devastating stories of Bay Area residents affected by landslides and learn to recognize the danger signs.
Rio Grande data project [More info]: Water-resource related projects on the Rio Grande ongoing or completed by Federal, state, local, or other agencies, to facilitate sharing of data related to the Rio Grande.
River corridor habitat dynamics, Lower Missouri River [More info]: Detailed description of The Lower Missouri River Corridor Habitat Dynamics Project studying river habitat in a heavily engineered river.
River inventory and monitoring [More info]: Links to science programs on upper Midwest river inventory and monitoring with links to databases on macroinvertebrates, fisheries, vegetation, water quality, bathymetry, floodplain forest, wildlife, sediment, contaminants and nutrients.
River-Corridor Habitat Dynamics, Lower Missouri River [More info]: Changes in the channel of the river to support commercial use have affected river-corridor habitats and diminished populations of native fish and wildlife; this study seeks to understand those changes to help local resource managers.
Rocky Mountain Mapping Center [More info]: Home page for the USGS Rocky Mountain Mapping Center in Denver, CO with mapping activities in the western U.S. and links to research activities, products, mapping liaisons, and education.
Runoff conditions in Utah for water year 2011 [More info]: Describes snowpack and other factors that affected runoff in the state during this period in which the wettest 90-day period occurred.
SAGEMAP: a web-based spatial dataset for sage grouse and sagebrush steppe management in the Intermountain West [More info]: Links to fact sheet describing the database of spatial information on sage grouse and sagebrush habitats.
STATEMAP information sheets [More info]: Click on a state on a map or list to access status of geologic mapping at the scales of 1:24,000 and 1:100,000 under the National Cooperative Geologic Mapping Program (NCGMP) providing federal matching funds for state geologic work.
Salinity variation in an estuary used for oyster cultivation in southeastern North Carolina during the passover of the eye of Hurricane Bertha [More info]: Review of a study monitoring changes in salinity in Alligator Bay, NC during a 1996 hurricane due to the influx of fresh and saltwater and the effect it would have on oyster aquaculture.
Salvinia molesta, Salvinia weevil, Salvinia minima [More info]: Life history and identification of Salvinia species, a floating, rootless tree fern and a noxious aquatic weed. Site includes posters, instructions on submitting sightings, how to subscribe to a listserv on the weed, and a bibliography.
San Francisco Bay Area Regional Database (BARD) [More info]: Download or view digital elevation models of this area.
San Francisco Bay Region geology [More info]: Gateway to the geology of the San Francisco Bay region with links to geologic maps, paleontology, marine geology, earthquakes, landslides, and geophysics. Includes maps, 3-D models, and photos.
San Francisco Bay bathymetry web site [More info]: Provides location-depth grids of bathymetry available for San Francisco Bay and tools for examining those grids. Data provided as GIS grids and animations.
Sand waves at the mouth of San Francisco Bay, California [More info]: Postcard available for downloading and printing.
Satellite imagery: Lake Pontchartrain Basin and Gulf of Mexico [More info]: Report on satellite imagery collected by the NOAA Advanced Very High Resolution Radiometer (AVHRR) on NOAA polar-orbiting weather satellites. Links are provided to imagery of north-central Gulf of Mexico and of the Lake Pontchartrain.
Satellite technologies detect uplift in the Yellowstone Caldera [More info]: Explanation of uplift in the land surface of the northern part of the Yellowstone caldera (12cm, about ~5 inches) that occurred between 1997 and 2003, including the scientific methods by which it was detected and analyzed.
Satellite tracking and geospatial analysis of feral swine and their habitat use in Louisiana and Mississippi [More info]: Invasive pigs first introduced to the continental United States in the 1500s by European explorers. Using tracking collars, we have begun to discover where these troublesome animals go.
Savanna restoration bibliography [More info]: A searchable, living bibliography on the subject of savannas and their restoration.
Schlumberger soundings at the Amargosa Desert Research Site, Nevada [More info]: Report presenting the data, automatic interpretations, cross sections, and resistivity maps of direct current electrical soundings at the Amargosa Desert Research Site near Beatty, Nevada using a Schlumberger array.
Science Goals of the U.S. Department of the Interior Southeast Climate Science Center [More info]: A list of research topics we expect to undertake, with a short statement for each one explaining the rationale and benefit of pursuing that goal.
Science In Your Watershed [More info]: Enables you to identify and locate a specific watershed, find scientific publications or research work going on there, and begin to integrate observations of your watershed with other data.
Science to support the understanding of Ohio's water resources [More info]: Short descriptions of a variety of ongoing USGS studies focused on water resources in Ohio.
Science to support the understanding of south Texas surface-water and groundwater resources in a changing landscape [More info]: Short descriptions of the research and monitoring activities we are carrying out to assist state, local, and Federal agencies dealing with water resource issues in the southern part of the state.
Scientific drilling in Long Valley, California: What will we learn? [More info]: Description of 1998 drilling project at Long Valley Exploratory Well located on Long Valley Caldera's resurgent dome to monitor changing conditions beneath the dome. (Document in PDF format.)
Scientists discover analog for extraterrestrial life in Idaho Hot Springs [More info]: Report on a community of microscopic organisms, Archaea, found deep in an Idaho hot spring living on hydrogen and carbon dioxide that could possibly exist on other planets. Includes links to related studies, investigators, and microbiology.
Sea floor off San Diego, California [More info]: Postcard available for downloading and printing.
Sea otter research at Western Ecological Research Center (WERC) [More info]: Webpage on research on sea otters (Euhydra lutris) in the nearshore environment of the eastern Pacific Ocean with information on status of otters on the coast of Alaska, Washington, and California and link to fact sheet in PDF format.
Sea-floor morphology between Año Nuevo and Santa Cruz, California [More info]: Report with preliminary sea floor map displaying submarine rock exposures found along the northern part of Monterey Bay National Marine Sanctuary, extent based on side-scan sonar records, seismic-reflection records, and underwater video.
Seafloor erosional processes offshore of the Chandeleur Islands, Louisiana [More info]: Study addresses questions and concerns related to limited sand resources along the Louisiana shelf and their implications to long-term relative sea-level rise and storm impacts, using newly acquired geophysical and vibracore data.
Search for Washington State publications [More info]: Bibliography of published reports, maps, journal articles, and proceedings related to the water resources of Washington State as published by the U.S. Geological Survey, or in cooperation with other Federal or State agencies.
Sediment load from major rivers into Puget Sound and its adjacent waters [More info]: Sediment from rivers has both beneficial and detrimental effects on ecosystems and human activities around Puget Sound. We explain where the sediment comes from, how it is transported, and the nature of the data that we can use to understand it.
Seismic properties of North America and the surrounding ocean basins [More info]: Presentation of maps of the seismic properties of North America and the surrounding ocean basins compiled from seismic refraction and reflection data, earthquake studies, and surface wave analyses showing crustal thickness and geologic provinces.
Selenium and stable isotopes of carbon and nitrogen in the benthic clam Corbula amurensis from Northern San Francisco Bay, California: May 1995-February 2010 [More info]: Monthly selenium concentration in this keystone species shows strong spatial and seasonal variation in a five-year series of analyses.
ShakeMap [More info]: ShakeMap sites provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.
Shoreline surveys of oil-impacted marsh in southern Louisiana, July to August 2010 [More info]: Locations of survey points, a photographic record of each site, field observations of vegetation cover and descriptions of oil coverage in the water and on plants, including measurements of the distance of oil penetration from the shoreline.
Sinkholes [More info]: Explains sinkhole formation and distribution, with special emphasis on their occurrence in Missouri
Solar irradiance and streamflow in Kansas [More info]: Report on the hypothesis that variations of the total solar irradiance reaching the Earth and its atmosphere affect the precipitation and runoff of the western U.S. Includes links to research papers, bibliography, and climatic data.
Sound data management as a foundation for natural resources management and science [More info]: Arguments in favor of using formal database technology, expecially geodatabases, to manage scientific information, with examples from Texas.
Source, Use, and Disposition of Freshwater in Puerto Rico, 2005 [More info]: Quantitative analysis of water use statistics for Puerto Rico, showing domestic, agricultural, industrial, and electric power as the main offstream uses.
South Carolina coastal erosion study [More info]: USGS project to understand coastal evolution and modern beach behavior; to identify and model the physical processes affecting coastal ocean circulation and sediment transport; and to identify sediment sources and construct a regional sediment budget.
South Dakota District - our cooperators [More info]: Links to web sites of cooperators coordinating with the USGS South Dakota District in the collection of water resources data includes federal, state, tribal and local agencies.
South Florida Ecosystem History Project [More info]: Project is designed to integrate studies from a number of researchers compiling data from terrestrial, marine, and freshwater ecosystems within south Florida. Links to publications, maps, posters, and data of studies.
South Florida Information Access (SOFIA) [More info]: Portal of the South Florida Information Access (SOFIA) system providing multiple links to projects, products, information, and data for research, decision-making, and resource management of the South Florida ecosystem restoration effort.
South Florida Information Access (SOFIA) data exchange [More info]: Provides links to the data, models and maps on the biology, ecology, geology, mapping, hydrology, and chemistry of research studies in southern Florida.
South Florida Information Access (SOFIA) metadata [More info]: Links to metadata of South Florida research projects and to the webpage of the project.
South Florida Information Access (SOFIA) projects by region [More info]: Listing of South Florida Information Access (SOFIA) projects by region
South Florida Information Access (SOFIA) projects by topic [More info]: Links to explore South Florida and the Everglades ecosystem projects arranged by topic and subtopic, including proposals, project summaries, scopes of work, work plans, publications, and contacts.
South Florida Information Access (SOFIA) publications [More info]: A variety of publications including fact sheets, open file reports, circulars, and posters, are available on the South Florida Information Access (SOFIA) site.
South Florida Restoration Science Forum [More info]: Discussions and posters about agriculture, ecology, hydrology, ecosystems, and resource management efforts in south Florida.
South Florida Restoration Science Forum: Invasive exotic species [More info]: Posters on the distribution and control of nonindigenous species introduced into southern Florida.
South Florida Virtual Tour [More info]: A pictorial overview for general audiences of key landscapes and ecosystems in South Florida; includes extensive references and links to past and current research activities relating to the South Florida ecosystem restoration effort.
South San Francisco Bay, California [More info]: Postcard available for downloading and printing.
Southeast Ecological Science Center [More info]: Science center in Florida focusing on amphibians and reptiles, coastal ecology, contaminants and ecotoxicology, imperiled fish, manatees, and invasive species
Southeast Ecological Science Center - Welcome to the kid's corner [More info]: Children's website on southern Florida aquatic biology with short movie clips of amphibians, games & puzzles, wildlife pictures, teacher resources, and more.
Southeast Ecological Science Center - poster presentations [More info]: Poster presentations related to Greater Everglades, marine and coral studies, ecotoxicology, manatees, coastal ecology, nonindigenous aquatic species, coastal ecology, freshwater fisheries, and herpetology.
Southeastern Amphibian Research and Monitoring Initiative [More info]: Overview of the Southeastern Amphibian Research and Monitoring Initiative, annual report, field methods and protocols, statistical design and analysis, glossary, projects, and lists of frogs, toads and salamanders.
Southern California Areal Mapping Project (SCAMP): find geologic maps [More info]: Download digital geologic databases produced by the Southern California Areal Mapping Project (SCAMP) or view SCAMP work in progress by clicking on 1:100,000-scale, 30x60 minute quadrangles.
Southern California Mapping Project (SCAMP) [More info]: Description of the SCAMP project to produce geologic and geophysical maps and reports that describe the geologic setting and geologic history of southern California.
Southwest Caves Reveal New Forms of Life [More info]: These lightless and nutrient-poor natural systems are home to life forms found nowhere else on Earth. Three new genera and at least 15 new species have been discovered here.
Southwest Principal Aquifers Regional Ground-Water Quality Assessment [More info]: Study of the susceptibility and vulnerability of basin-fill aquifers in the region to ground-water contamination by synthesizing the information on ground-water quality conditions in 15 basins from previous studies.
St. Louis Area Earthquake Hazards Mapping Project [More info]: Overview of USGS research focused on earthquake hazards of this specific area.
St. Petersburg Coastal and Marine Science Center [More info]: Research with a primary focus on coastal and marine environments and societal implications of natural hazards, resource sustainability, and environmental change.
St. Petersburg Coastal and Marine Science Center coral reef research [More info]: Describes ecological problems facing coral reef ecosystems and the research strategies we use to study the prevalence and severity of those problems.
State minerals statistics and information [More info]: Links to mineral statistics from annual Mineral Yearbooks for each state in the United States and Puerto Rico, with contacts for further information, and means to apply for e-mail subscription service for regular updates.
Statewide observation well network in Pennsylvania [More info]: In 1931, the USGS established a statewide network of wells in Pennsylvania to monitor water-level fluctuations. This network consists of 68 wells to monitor ground water conditions during droughts. Links to ground-water data, hydrographs, and levels.
Status and Trends of Resources Below Glen Canyon Dam Update - 2009 [More info]: Summary of changes to water quality, sediment, aquatic food, native fish, riparian vegetation, and archeological, cultural, and recreational sites since the previous assessment.
Status and Trends of the Grand Canyon Population of Humpback Chub [More info]: The number of adult humpback chub--fish 4 years old and older and capable of reproduction--increased approximately 50 percent between 2001 and 2008.
Status and trends of the Nation's biological resources [More info]: This report is major publication on national biological resources that compiles and presents status and trends information for use by resource managers and the public. Presents detail information on ecosystems, plants, and animals.
Stoneflies of the United States [More info]: Links to checklists and species maps showing the distribution of stoneflies in the United States with links to other information websites on stoneflies and reference list.
Streamflow characteristics and benthic invertebrate assemblages in streams across the western United States [More info]: Change in streams accompanying land and water use may affect benthic invertebrate assemblage composition and structure through changes in density of invertebrates or taxa richness, the number of different species living in the stream.
Streamflow of 2007--Water year summary [More info]: A broad survey of regional patterns in stream flow nationwide. Maps and graphs summarizing streamflow conditions for water-year 2007 (October 1, 2006 to September 30, 2007) in the context of the 78-year period 1930-2007.
Streamflow of 2008--Water year summary [More info]: A broad survey of regional patterns in stream flow nationwide. Maps and graphs summarizing streamflow conditions for water-year 0810 (October 1, 2007 to September 30, 2008) in the context of the 79-year period 1930-2008.
Streamflow of 2009--Water year summary [More info]: A broad survey of regional patterns in stream flow nationwide. Maps and graphs summarizing streamflow conditions for water-year 2009 (October 1, 2008 to September 30, 2000) in the context of the 80-year period 1930-2009.
Streamflow of 2010--Water year summary [More info]: A broad survey of regional patterns in stream flow nationwide. Maps and graphs summarizing streamflow conditions for water-year 2010 (October 1, 2009 to September 30, 2010) in the context of the 81-year period 1930-2010.
Streamflow of 2011 - Water Year Summary [More info]: A broad survey of regional patterns in stream flow nationwide. Maps and graphs summarizing streamflow conditions for water-year 2011 (October 1, 2010 to September 30, 2011) in the context of the 82-year period 1930-2011.
Streamflow statistics for US states [More info]: Streamflow statistics and basin characteristics for most streams in specific US states using the Streamstats program. Data for areas can be selected from interactive maps and by an automated process. Includes a tutorial.
Studies and trends of selected inland lakes of the Great Lakes Cluster National Parks [More info]: Report on the status of the biota and ecological factors of the inland lakes of the Great Lakes Cluster Parks: Indiana Dunes, Sleeping Bear Dunes,and Pictured Rocks National Lakeshores and Isle Royale and Voyageurs National Parks. (PDF file, 321 p.)
Studies in Long Island Sound: geology, contaminants, and environmental issues [More info]: Description of Long Island Sound projects and links to research topics, data, publications, photos, and technology on sediment transport, sea floor mapping, contaminant sampling, sediment texture, and environmental issues.
Studies of Climate Change in the Yukon River Basin: Connecting Community and Science Through a Unique Partnership [More info]: Study to establish a baseline dataset of water quality, which will serve as an important frame of reference to assess future changes in the basin that may result from a warmer climate.
Studies of polluted sediment offshore Los Angeles [More info]: Overview of studies of marine sediment on the continental shelf south of Los Angeles contaminated with DDT and PCBs from past sewage effluent discharges with links to research on Santa Monica Bay, Los Angeles Shelf and Palos Verdes Peninsula.
Sturgeon research update: Confirmed pallid sturgeon spawning in the Missouri River in 2007 [More info]: Combined with supporting research in reproductive physiology, identification of spawning habitat, and early life history this result provides new understanding of environmental factors that might affect reproduction of this endangered species.
Summary and analysis of the U.S. government bat banding program [More info]: Analysis of the program with a detailed study of the best collection of data available from it. Includes recommendations for future studies of bats.
Summary of Bed-Sediment Measurements Along the Platte River, Nebraska, 1931-2009 [More info]: Studies of the size of bed sediment along the length of a river through time show how the river channel will be affected by development or management efforts.
Summary of estimated water use in the United States in 2005 [More info]: Estimates the amount of several types of water (surface or groundwater, freshwater or saltwater) withdrawn for use in 2005, detailing the major activities for which the water was used.
Summary of suspended-sediment concentration data, San Francisco Bay, California, water year 2000 [More info]: Suspended-sediment concentration data were collected in San Francisco Bay during water year 2000 using optical backscatterance sensors and water samples. This report presents the data-collection methods, data, and calibration plots.
Summary report of nonindigenous aquatic species in U.S. Fish and Wildlife Service Region 4 [More info]: Report prepared for the U.S. Fish and Wildlife Service with descriptions of exotic aquatic species introduced in the southeast United States with information on populations, geographic distribution, and origins.
Surface-water data and statistics from U.S. Geological Survey data-collection networks in New Jersey on the world wide web [More info]: Streamflow-gaging and water quality sampling sites with real-time and historical surface-water data for many of the sites in New Jersey.
Surface-water data for Alabama [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Alaska [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Arizona [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Arkansas [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for California [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Colorado [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Connecticut [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Delaware [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for District of Columbia [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Florida [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Georgia [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Hawaii [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Idaho [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Illinois [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Indiana [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Iowa [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Kansas [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Kentucky [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Louisiana [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Maine [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Maryland [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Massachusetts [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Michigan [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Minnesota [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Mississippi [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Missouri [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Montana [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Nebraska [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Nevada [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for New Hampshire [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for New Jersey [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for New Mexico [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for New York [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for North Carolina [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for North Dakota [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Ohio [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Oklahoma [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Oregon [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Pennsylvania [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Rhode Island [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for South Carolina [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for South Dakota [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Tennessee [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Texas [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Utah [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Vermont [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Virginia [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Washington [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for West Virginia [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Wisconsin [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for Wyoming [More info]: Consistent, historic, and up-to-date surface-water data, such as gage height (stage) and streamflow (discharge), collected at major rivers, lakes, and reservoirs, downloadable from the USGS National Water Information System as graphs, tables, or files.
Surface-water data for the Nation [More info]: Homepage for USGS national surface-water data with more than 850,000 station years of time-series data for stream levels, streamflow (discharge), reservoir and lake levels, surface-water quality, and rainfall plus real-time data and tutorial.
Suspended-sediment database: daily values of suspended sediment and ancillary data [More info]: Enables searching by state, hydrologic region, basin, time period, and length of record to retrieve suspended sediment data for the United States.
Sustainability of Water Resources in the Fractured-Rock Area of Maryland [More info]: Explains why a water resource assessment for the area west of the Fall Line is needed.
Sutter Buttes-the lone volcano in California's Great Valley [More info]: Explains history and structure of this unusual geologic feature.
Tadpoles of the United States and Canada: a tutorial and key [More info]: Key and tutorial to identify species of tadpoles from North America with color photographs.
Taking the Pulse of a River System: Research on the Upper Mississippi River System [More info]: Short summaries of long-term research projects concerning the biological health of this section of the Mississippi river.
Taming of a wild research well in Yellowstone National Park during November 1992 [More info]: A valve failed in a research well, causing an uncontrolled eruption of steam and hot water. Video program shows technical problems encountered in controlling and capping the well.
Tampa Bay Study [More info]: Overview of interdisciplinary research on the Tampa Bay estuary of the Gulf of Mexico with links to digital library, interactive mapping, reports, posters, water chemistry maps, meetings and conferences, scientist directory, and field trips.
Tapestry of time and terrain: union of two maps, geology and topography [More info]: Colored map compiled by merging geologic and topographic maps of the United States through computer processing and enhancement with links to panoramic movie using QuickTime, descriptions of features, and a game entitled Puzzle of Regions.
Taste and odor occurrence in Lake William C. Bowen and Municipal Reservoir #1, Spartanburg County, South Carolina [More info]: Explains why and how water from this reservoir, and others like it, sometimes acquire undesirable taste or odor, yet are not dangerous to drink.
Teacher's guide to the San Francisco Bay area geophysics maps (U.S. Geological Survey GP-1006 and GP-1007) [More info]: This publication (Open-File Report 95-479) is a teacher's guide to two U.S. Geological Survey maps that show gravity and magnetic data in contour form superimposed on a LANDSAT satellite image of the San Francisco Bay area.
Tennessee publications on water resources [More info]: Access to online publications produced by the Tennessee District and its cooperators on Tennessee water resources.
The Alaska Geochemical Database: v. 1.0 - Geologic Materials [More info]: Geochemical analyses of rocks, mineral separates, lake and stream sediment bulk samples, heavy-mineral concentrates, and soils collected by USGS in Alaska from 1962 through 2009.
The Baltimore-Washington Regional Collaboratory Land-Use History Research Program [More info]: A description of research activities of the Baltimore-Washington Regional Collaboratory urban growth in the Chesapeake region.
The Border Environmental Health Initiative-investigating the transboundary Santa Cruz watershed [More info]: Study to identify risks to water resources in the SCW, and the potential consequences to riparian ecosystems and ultimately human health.
The Chesapeake Bay bolide: modern consequences of an ancient cataclysm [More info]: Presentation that the location of Chesapeake Bay may have been predetermined by a Eocene bolide, an extraterrestrial body, impacting the Earth in the vicinity of the Delmarva Peninsula at high velocity and exploding to create a large crater.
The Columbia River Research Laboratory [More info]: Describes the research carried out here, with special emphasis on fish and the people and equipment used to study them.
The Cottonwood Lake study area, a long-term wetland ecosystem monitoring site [More info]: Here we study effects of climate and groundwater on surface-water levels, the hydrological effects on wetland water chemistry, and the combined effects of climate, hydrology, and water chemistry on plant and animal communities of prairie pothole wetlands.
The Geologic Story of Colorado's Sangre de Cristo Range [More info]: Rock types, geologic structure, and the history of their formation in this mountain range.
The Great Flood of 1993 [More info]: Photos, publicatons and recordbreaking flood peaks from the flood that included 9 states, the Mississippi and Missouri Rivers, and completely inundated 75 towns.
The Hayward fault - Is it due for a repeat of the powerful 1868 earthquake? [More info]: Preparing for earthquakes along this important fault requires studying the history of its movement and its geology, as well as understanding how society has built the area around it.
The Midwest Stream Quality Assessment [More info]: Upcoming interagency study to assess status of ecological conditions, their relationships with contaminants and nutrients, anthropogenic factors affecting these, and develop models that may predict these ecological conditions.
The National Map [More info]: Homepage describing The National Map, which will produce a seamless, continuously maintained set of public domain geographic base information, with links to map viewer, pilot projects, reports, fact sheets, and national atlas.
The National Map Viewer [More info]: National Map Viewer, a GIS application, is a Web-enabled portal to the geospatial information contained in The National Map. It supports on-line access and allows the download of digital data and creation of cartographic products.
The National Map: reports [More info]: Fact sheets and reports on the National Map in HTML format or PDFs.
The National Map: topographic maps for the 21st century [More info]: Description of the The National Map project intended to provide a seamless, integrated, and continuously maintained set of geographic base information for easily accessible, up-to-date, accurate mapping of the United States.
The Ozark Highlands [More info]: Science issues in this area identified by USGS and its partners, including regional goals and objectives, threats and emerging issues, and information gaps
The Parkfield Experiment - capturing what happens in an earthquake [More info]: Fact sheet describing plans for a San Andreas Fault Observatory at Depth (SAFOD) by drilling into the fault to install instruments for long-term monitoring near the location of the magnitude 6 Parkfield earthquakes.
The Public Land Survey System (PLSS) [More info]: Explains the characteristics and history of this distinctive way of describing geographic position characteristic of the midwestern and western states of the US.
The San Andreas Fault [More info]: Online booklet on the San Andreas fault system on the California coastal region with discussion of faults, relationship of faults and earthquakes, magnitude of earthquakes, and earthquake probability.
The South Florida environment-- a region under stress [More info]: This report serves as an environmental review and framework for developing USGS programs in the south Florida ecosystem, especially the Everglades and its watershed, and stresses the critical role of water in natural and human environment.
The U.S. Geological Survey and the Chesapeake Bay - the role of science in environmental restoration [More info]: Summary of a circular on USGS environmental research and Chesapeake Bay with links to full document. Includes discussion of the problems of the estuary, restoration efforts, water quality, and effects on ecosystem.
The Yukon River Basin Active Layer Network: A cooperative project between the Yukon River Inter-Tribal Watershed Council and the U.S. Geological Survey [More info]: Monitoring soil temperature, soil moisture, air temperature, and overall thickness of the soil and sediment that is above the permafrost, therefore undergoing freeze-thaw cycles. Climate change may affect this active layer; we want to know how it does.
The carbon cycle in lakes of the Upper Mississippi Basin [More info]: Summary of part of the USGS interdivisional Mississippi Basin Carbon project that will study the changes in climate and the environment through carbon cycle changes recorded in lake sediments in the Upper Mississippi River Basin.
The challenges of capturing and tagging manatees along west coastal Florida [More info]: Description of method of capturing and tagging manatees in western Florida for tracking by satellite telemetry. Presented at a forum on telemetry.
The chronology for the d18O record from Devils Hole, Nevada, extended into the Mid-Holocene [More info]: This study extends the oxygen isotope record of this important paleoclimate record forward in time to cover more recent history, up to 4,500 years before present.
The effects of Glen Canyon Dam operations on early life stages of rainbow trout in the Colorado River [More info]: Complex interactions among hydrologic events initiated by people and the behaviors and characteristics of animal species (both native and introduced) lead to important scientific and management problems.
The great 1906 earthquake, 100 years later [More info]: Annotated list of resources about the great earthquake of 1906, which caused significant devastation in and around San Francisco, California, compiled for the 100th anniversary of the disaster.
The ongoing Pu'u 'O'o eruption of Kilauea Volcano, Hawai'i -- 30 years of eruptive activity [More info]: Fact sheet chronicles and illustrates Kilauea Volcano's longest rift-zone eruption in more than 500 years.
The principal rare earth elements deposits of the United States-A summary of domestic deposits and a global perspective [More info]: Explains the geologic setting in which these deposits are found, with information about production and the processes used to extract these valuable mineral resources.
The rivers of Mississippi [More info]: Colored maps and geographic descriptions of major river basins in the state of Mississippi.
The role of climate in estuarine variability [More info]: Article from American Scientist on study of the San Francisco Bay estuary as a component of the global climate system showing that natural fluctuations might be mistaken for anthropogenic trends affecting waterflow and salinity.
The saga of leafy spurge (Euphorbia esula) in the northern Great Plains [More info]: Explains why this invasive plant is successful in taking over land in many northern states, and what might be done to impede its dominance.
The sea-floor mapping facility at the U.S. Geological Survey Woods Hole Field Center, Woods Hole, Massachusetts [More info]: Fact sheet on the sea-floor mapping facility at Woods Hole describing state-of-the-art technology used to produce accurate geologic maps of the sea floor and reporting on its data-acquisition, data-processing, and archiving capabilities.
The story of the Hawaiian Volcano Observatory -- A remarkable first 100 years of tracking eruptions and earthquakes [More info]: History of the Hawaiian Volcano Observatory (HVO), established in 1912, including an overview of Hawaiian volcanic processes and USGS monitoring techniques.
Three Experimental High-Flow Releases from Glen Canyon Dam, Arizona-Effects on the Downstream Colorado River Ecosystem [More info]: Scientific issues we should consider when conduction high flow experiments to ameliorate the negative effects of dams on native river species and fluvial processes.
Three-dimensional geologic maps and visualization [More info]: Techniques of computer-based representations of areal geology to construct three-dimensional geologic maps that retain all the information of traditional geologic maps while providing a more detailed picture of the subsurface.
Tides and inflows in the mangroves of the Everglades (TIME) [More info]: Links for the Tides and Inflows in the Mangroves of the Everglades (TIME) project on the effects of freshwater and tidal flows on the Everglades mangroves. With links to software & manuals, time data, photos, animations, and bibliography.
Tiger beetles of the United States [More info]: Links to checklists and species maps showing the distribution of tiger beetles in the United States with links to photographs, other information websites on invertebrates, and reference list.
Tintina gold province study, Alaska and Yukon Territory, 2002-2007 [More info]: New discoveries and modernized extraction methods prompted renewed interest in gold deposits in this part of central Alaska, prompting a variety of studies described here.
Tools for learning about birds [More info]: Links to pictures, songs and identification of birds of the United States, Canada, and Central America plus seasonal bird maps and a quiz on birds.
Topographic map locator [More info]: Interactive map locator for downloading free USGS topographic maps.
Topographic maps [More info]: General information on topographic maps with links to topographic mapping, USGS topographic maps, digital raster graphics, how to find and order USGS maps, map revision, and map symbols.
Toxicity and bioavailability of metals in the Missouri River adjacent to a lead refinery [More info]: Report (PDF format) on an evaluation of the potential environmental impacts of contaminated ground water from a metals refinery adjacent to the Missouri River in Omaha, Nebraska testing water and sediments for contaminants and toxicity.
Trace metals related to historical iron smelting at Hopewell Furnace National Historic Site, Berks and Chester Counties, Pennsylvania [More info]: Iron ore containing elevated concentrations of trace metals was smelted here during 113 years of operation (1771-1883). We sampled a variety of materials nearby to determine the amount of metals such as arsenic, chromium, copper, lead, and zinc.
Transport of water, carbon, and sediment through the Yukon River basin [More info]: Summarizes a water-quality study of one of the last great uncontrolled rivers in the world, which supplies runoff, sediment, and nutrients to the eastern Bering Sea and Chukchi Sea.
Tree rings record of 100 years of hydrologic change within a wetland [More info]: Use of tree ring dating to study distinct episodes of hydrologic change in the Tully Valley wetland, New York recording history of solution-brine injection mining for salt.
Trichloroethylene (TCE) in fractured bedrock, Naval Air Warfare Center, Trenton, N.J. [More info]: Research on contamination by trichloroethylene (TCE) in fractured rock at the Naval Air Warfare Center in Trenton, N.J. with links to site description, bibliography, online reports, and findings.
Trumpeter swan [More info]: Studies of the trends of the Rocky Mountain population of trumpeter swans using time series analysis.
Tsunami preparedness along the U.S. West Coast (video) [More info]: Guidelines for correct tsunami response and community preparedness from local emergency managers, first-responders, and leading experts on tsunami hazards and warnings.
Tsunami preparedness in California (videos) [More info]: Guidelines for correct tsunami response and community preparedness from local emergency managers, first-responders, and leading experts on tsunami hazards and warnings.
Tsunami preparedness in Oregon (video) [More info]: Guidelines for correct tsunami response and community preparedness from local emergency managers, first-responders, and leading experts on tsunami hazards and warnings.
Tsunami preparedness in Washington (video) [More info]: Guidelines for correct tsunami response and community preparedness from local emergency managers, first-responders, and leading experts on tsunami hazards and warnings.
Tsunamis & earthquakes [More info]: Homepage for tsunami research with links to information and images on basics, tsunamis in the Pacific Northwest, the 1998 Papua New Guinea tsunami, research on specific tsunamis, and animations in various formats.
Tualatin River basin water quality assessment [More info]: Overview of project assessing water quality of the Tualatin River basin near Portland, Oregon with links to reports on chemical and nutrient levels and selected data on streamflow, water temperature, weather and precipitation.
Twelve Years of Monitoring Phosphorus and Suspended-Solids Concentrations and Yields in the North Fork Ninnescah River above Cheney Reservoir, South-Central Kansas 1997-2008 [More info]: Water quality is important here because this reservoir is the primary supply for Wichita, Kansas. Due to low streamflow during the monitoring period, we expect suspended sediment and phosphorus to be more variable in the future.
Two decades of research at Crater Lake [More info]: Research brief for resource managers on the ecology of Crater Lake.
U.S. - Mexico Border Environmental Health Initiative: interactive maps [More info]: Geographic and scientific information focused on health issues in the area of the US-Mexico border
U.S. Atlantic East Coast [More info]: Atlantic East Coast interactive map with GIS datasets and sonar imagery.
U.S. Department of the Interior South Central Climate Science Center [More info]: Explains the goals and strategies to be pursued by this organizational unit of the USGS along with partners and stakeholders.
U.S. Geological Survey (USGS) Western Region Coastal and Ocean Science [More info]: Overview of USGS research addressing a broad range of coastal and marine issues in California, Oregon, Washington, Alaska, and Hawaii.
U.S. Geological Survey (USGS) Western Region Kasatochi Volcano Coastal and Ocean Science [More info]: Long-term studies to better understand the effects of the eruption and the role of volcanism in structuring ecosystems in the Aleutian Islands, a volcano-dominated region with high natural resource values.
U.S. Geological Survey (USGS) Western Region: Alaska Coastal and Ocean Science [More info]: Overview of USGS research addressing a broad range of coastal and marine issues in Alaska.
U.S. Geological Survey (USGS) Western Region: Santa Barbara Channel Coastal and Ocean Science [More info]: Overview of USGS research addressing a broad range of coastal and marine issues in the Santa Barbara Channel and vicinity, California.
U.S. Geological Survey (USGS) Western Region: Seabirds Coastal and Ocean Science [More info]: Overview of USGS research on the breeding, behavior, and population ecology of Pacific seabirds.
U.S. Geological Survey archived data recovery in Texas, 2008-11 [More info]: Our 2008-11 data rescue and recovery efforts resulted in an efficient workflow process, database, and Web user interface for scientists and citizens to access archived environmental information not previously available to the public.
U.S. Geological Survey protocol for sample collection in response to the Deepwater Horizon oil spill, Gulf of Mexico, 2010 [More info]: It is important that we collect samples consistently and properly to assure the quality of the information needed by decision makers. This report explains the procedures for sampling water, sediment, benthic invertebrates, and microorganisms.
U.S. Pacific West Coast internet map server [More info]: Interactive map of the U.S. Pacific West Coast with data layers of Gloria sidescan data, multibeam backscatter and shaded relief imagery.
USGS - Nebraska cooperators and other contacts [More info]: Links to webpages of federal, state, local & municipality agencies and Nebraska Natural Resource Districts that are cooperators with the Nebraska District in the collection of water resources data. Plus contacts for other related agencies.
USGS / Department of Energy cooperative studies in Nevada [More info]: Describes cooperation of the USGS office in Las Vegas, Nevada, with the Department of Energy to address environmental and scientific issues at the Nevada Test Site and vicinity with links to project information.
USGS Alaska State Mosaic [More info]: Using 172 Scenes from the Multi-Resolution Land Characteristics 2001 collection geometrically and radiometrically aligned, we produced seamless, relatively cloud-free image of the entire state.
USGS Core Science Metadata Clearinghouse [formerly National Biological Information Infrastructure (NBII) Metadata Clearinghouse] [More info]: The USGS Core Science Metadata Clearinghouse contains metadata records describing datasets largely focused on wildlife biology, ecology, environmental science, temperature, land cover, and land stewardship.
USGS East-coast sediment analysis: analysis, procedures, database and georeferenced displays [More info]: Grain-size analysis of marine sediments of the U.S. eastern coast with sampling and lab methods, surficial sediment database in three formats (Excel, Dbase IV, ASCII), and use of geographic mapping tools for visualizing sediment data layers.
USGS Ground-Water Networks [More info]: Maps of three ground-water monitoring networks that group related wells and data from active well networks, and provide basic statistics about the water-level data collected by USGS.
USGS Hydro-Climatic Data Network 2009 (HCDN?2009) [More info]: This updated subset of USGS streamgages for which the streamflow primarily reflects prevailing meteorological conditions for specified years, screened to exclude sites where human activity affects the natural flow of the watercourse.
USGS Indiana District adopts White River [More info]: Volunteers from the USGS in Indiana, their families, and friends donate two Saturdays a year for a river-cleanup.
USGS Pacific coral reefs website [More info]: Overview of research in the Hawaiian Islands and Guam to gain insight into the structure of coral reefs, to provide the basis for future monitoring, and to understand the influences of natural processes and human activities on coral reef health.
USGS St. Petersburg Coastal and Marine Science Center [More info]: Extreme storms, sea-level rise, and the health of marine communities are some of the major societal and environmental issues studied by this part of USGS.
USGS St. Petersburg Coastal and Marine Science Center--Research activities in the U.S. Virgin Islands [More info]: Explains type of information we collect and the problems we study in this area, focusing on coral reef ecosystems, ocean acidification, and sea-level change.
USGS Water Science Cooperators and Partners in Nevada [More info]: Links to water resources data customers of the Nevada District includes federal, state, and regional agencies and Indian tribes.
USGS Zebra Mussel Monitoring Program for north Texas [More info]: General characteristics of this invasive freshwater mollusk, focusing on how we monitor its presence and migration through this region.
USGS activities in Nevada [More info]: Homepage for USGS projects in Nevada with links to geography, biology, geology and water projects, news items, customers, Frequently Asked Questions (FAQs), education, recreation, data, studies, and publications on Nevada.
USGS activities in Texas: Texas sites by basin [More info]: Real-time water data, interactive maps, and flood reports for river basins in Texas.
USGS geology in the parks [More info]: U.S. Geological Survey and National Park Service virtual geology sites organized by geology topics and individual parks.
USGS maps [More info]: Overview of the types of maps sold and distributed by the USGS.
USGS mine drainage activities [More info]: Listing of USGS research and monitoring projects on mine drainage, in order to promote cooperation and collaboration among scientists working on problems related to mining and the environment.
USGS projects in Illinois [More info]: Links to Illinois District water projects including projects on water quality, radium in ground water, ground water studies, and streamflow studies.
USGS publications on Illinois water resources [More info]: List of Illinois District publications, report abstracts, water resources abstracts, and fact sheets, newsletter archives on water resources in Illinois with links to online publications.
USGS research on Florida's isolated freshwater wetlands [More info]: Explains the geologic and hydrologic setting of freshwater wetlands and shows how USGS scientists study these areas.
USGS responds to hurricanes [More info]: Information is provided about coastal impacts of Katrina, Rita, and Wilma and Satellite Imagery and other Geospatial Data, News Releases, Streamflow Conditions, publications and other resources.
USGS studies in the New York Bight [More info]: Describes and provides links to USGS research in the location of the estuary and coast of Long Island, New York, to map the sea floor and to study sediment transport, contaminants, and sand resources and coastal vulnerability.
Unconsolidated aquifers of upstate New York [More info]: Information on aquifers in upstate New York which consist of unconsolidated deposits of sand and gravel that occupy major river and stream valleys or lake plains. Links to aquifer maps at scales 1:24,000 or 1:250,000 and cooperative publications.
Understanding Contaminants Associated with Mineral Deposits [More info]: Outlines processes that control the release of metals and acidic waters from inactive mines and mineralized areas, the transport of metals and acidic waters to streams, and the fate and effect of metals and acidity on downstream ecosystems.
Understanding earthquake hazards in urban areas - Evansville Area Earthquake Hazards Mapping Project [More info]: Evansville, Indiana, is near the Wabash Valley and New Madrid seismic zones and has experienced minor damage from earthquakes in the past 200 years. This fact sheet describes three types of USGS earthquake hazard maps for Evansville and surrounding areas.
Understanding pesticides in California's Delta [More info]: The Sacramento-San Joaquin River Delta is the hub of California's water system and an important habitat for fish and wildlife. USGS research has provided resource managers and other stakeholders with a good understanding of how pesticides enter the Delta.
Understanding the habitat needs of the declining western yellow-billed cuckoo [More info]: This endangered species prefers native trees in large, continuous areas of riparian habitat. Armed with this information, resource managers may identify and preserve areas favorable to this population.
United States Geological Survey fire science--Fire danger monitoring and forecasting [More info]: We use moderate resolution satellite data to assess live fuel condition for estimating fire danger. Using 23 years of vegetation condition measurements, we are able to determine the relative greenness of wildland vegetation susceptible to burning.
United States National Seismic Hazard Maps [More info]: Maps indicating areas where earthquakes may cause damage or disrupt human activities, with information about how those maps are compiled.
Upper Midwest Environmental Science Center (UMESC) [More info]: Homepage for Upper Midwest Environmental Science Center, LaCrosse, Wisconsin, with links to data library, geographical search, science programs, partnerships, long-term resource monitoring program, reports and publications, and education.
Upper Mississippi River basin: sediments, contaminants, and nutrients [More info]: Downloadable data and map images depicting sedimentation changes and contaminants in sediments in the upper Mississippi River.
Upper Mississippi River basin: water quality, water elevation, and discharge [More info]: Information on flood potential and water quality in the upper Mississipi River, including downloadable data and map images.
Upper Mississippi River fish and macroinvertebrate data [More info]: Interactive databases providing detailed information on fish and macroinvertebrate abundance and diversity over time in pools of the upper Mississippi River basin.
Upper Mississippi River land cover and land use data [More info]: Maps and GIS data depicting land use and land cover in areas near the upper Mississippi River. Historical data are available, dating from the 1890s, 1975, and more regularly from the late 1980s to 2000.
Upper Wallkill River study [More info]: Program to measure streamflow stage and discharge at four sites in the Upper Wallkill River Valley's Black Dirt Region and determine Total Suspended Solids (TSS) concentration data and estimate loads of TSS and sources of contaminants.
Use of Light Detection and Ranging (LiDAR) to Obtain High-Resolution Elevation Data for Sussex County, Delaware [More info]: Methods and techniques used to collect and process LiDAR elevation data, the generation of the digital elevation model (DEM) and the 2-foot contours, and the quality-assurance procedures and results.
Using genetic research to inform imperiled and invasive species management [More info]: Describes investigative techniques focused on genetic characteristics of individuals and populations, and explains how this information helps improve existing natural populations and potentially impede invasive populations.
Using strip-transect aerial surveys to estimate manatee abundance in the Ten Thousand Islands region of southwest Florida [More info]: Report on use of strip-transect aerial surveys to obtain minimum manatee counts and distribution information in area of Ten Thousand Islands, Florida, with maps, diagrams, and information on method and results.
Vegetation recovery after fire in the Klamath-Siskiyou region, southern Oregon [More info]: Summarizes studies that took place in this ecoregion. Some studies occurred in areas without post-fire management, and others in moderately or intensively managed areas. Some of the research also occurred immediately after a wildfire, and other work occur
Vegetation sampling and classification of Great Smoky Mountains National Park (Cades Cove and Mount Le Conte quadrangles): final report [More info]: Report of a pilot study to classify vegetation communities in parts of the Smoky Mountains National Park by sampling vegetation in selected areas with information on field methods and data analysis and lists of communities identified.
Visualization of flow alternatives, Lower Missouri River [More info]: This report presents a visual, statistical presentation of five modeled flow-management alternatives and two reference alternatives for four selected sites on the Lower Missouri to aid in decision making for flow management of the river.
Volcano Hazards Program, California Volcano Observatory [More info]: Overview of volcano hazards in California with links to monitoring data including earthquakes and deformations, long-term outlook, volcano hazards in the area, USGS response plan, image gallery, monitoring and topical studies, publications and references.
Volcano hazard zones in the Long Valley - Mono Lake Area, California [More info]: Describes the volcano-hazard zones for the Long Valley and Mono-Inyo Craters volcanic chain identified by scientists of the U.S. Geological Survey.
Volcano monitoring at Yellowstone National Park [More info]: Describes volcano monitoring at Yellowstone National Park including an update of recent volcanic activity, real-time data, and link to volcano monitoring techniques information.
Volcano watch [More info]: Volcano Watch is a weekly newsletter issued by the U.S. Geological Survey's Hawaiian Volcano Observatory on volcanic features on the Big Island, volcanic hazards, and informational topics of Long Valley, Montserrat, or Alaska.
Volcanoes of Hawaii feature stories archive [More info]: Archive of feature stories on volcanic features on the Big Island, guided tours of Hawaii Volcanoes National Park, eruptions and eventful earthquakes, and other topics about the work of scientists at the Hawaiian Volcano Observatory.
Volcanoes of Hawaii photo gallery [More info]: Images of Hawaiian volcanoes and the islands they've built in the past few million years, and images of recent eruptions.
Volcanoes of the United States [More info]: Booklet detailing plate tectonics, eruptions, hazards, and monitoring of U.S. volcanoes with black and white photos.
Volunteer Program of the Hawaiian Volcano Observatory (HVO) [More info]: Site for the Volunteer Program at the Hawaiian Volcano Observatory (HVO) with information on how to become a volunteer, volunteer housing, examples of volunteer experiences, available volunteer projects, and about HVO.
Washington aeromagnetic maps and data [More info]: Colored geomagnetic and gravity maps and related data and graphical plots for the state of Washington.
Washington current streamflow conditions [More info]: Links to real-time streamflow data, river and storm alerts, snowpack reports, weather data and seasonal runoff for the state of Washington.
Waste disposal and contaminant migration in the arid Southwest: Amargosa Desert Research Site, Nevada [More info]: Links to studies at the Amargosa Desert Research Site by the USGS Toxic Substances Hydrology Program studying the subsurface migration and fate of contaminants in arid environments. Links to news, remediation, photos, bibliography and techniques.
Water Resources Inventory Area 1 (WRIA1) Watershed Management Project [More info]: Hydrologic data web page for the Water Resources Inventory Area 1 (WRIA 1) Watershed Management Project studying surface and ground water in the Nooksack watershed in northwest Washington. Links to environmental data and maps.
Water Resources and Natural Gas Production from the Marcellus Shale [More info]: The Marcellus shale is a black shale unit in the eastern US. It has economic use as a source of natural gas. Environmental concerns arising from the process of exploiting this resource include water supply and wastewater disposal.
Water Resources of Beauregard Parish [More info]: In 2005, about 30.6 million gallons per day (Mgal/d) of water was withdrawn here, including about 30.4 Mgal/d from groundwater and 0.1 Mgal/d from surface water. Industrial use, primarily for wood products, accounted for about 72 percent (22 Mgal/d).
Water Resources of Caddo Parish, Louisiana [More info]: In 2005, about 72.9 million gallons per day (Mgal/d) of water were withdrawn here, including about 7.70 Mgal/d from groundwater sources and 65.2 Mgal/d from surface-water sources. Public-supply use accounted for about 71%, and power generation 19%.
Water Resources of Lafayette Parish [More info]: Summarizes information on the water resources of Lafayette Parish, Louisiana. Information on groundwater and surface-water availability, quality, development, use, and trends is based on previously published reports.
Water Use in Georgia by County for 2005; and Water-Use Trends, 1980-2005 [More info]: Estimated using data obtained from various Federal and State agencies and local sources. Total consumptive water use also was estimated for each county in Georgia for 2005.
Water Watch: current water resources conditions [More info]: U.S. map of real-time streamflow compared to historical values with links to U.S. maps and data of surface water, ground water, precipitation, river conditions and floods and other information on current and past water resources conditions.
Water co-produced with coalbed methane in the Powder River Basin, Wyoming: preliminary compositional data [More info]: Compositional data on water from 47 CBM wells sampled in the Powder River Basin, Wyoming. Data on major, minor, and trace elements are included.
Water data for Illinois [More info]: Links to streamflow, surface and ground water, water quality, flood, drought, and precipitation data in real-time and for historic time periods for Illinois.
Water quality of San Francisco Bay [More info]: Thirty year database of water-quality data, visual data displays, and project information on the San Francisco Bay directed towards following and understanding changes in the water quality of San Francisco Bay.
Water quality studied in areas of unconventional oil and gas development, including areas where hydraulic fracturing techniques are used, in the United States [More info]: Maps showing number of water quality samples in areas underlain by unconventional oil and gas resources, broken out by surface water and groundwater.
Water quality well sites in New Jersey [More info]: Map of New Jersey showing the locations of all well sites where ground water-quality data exists in the USGS National Water Information System (NWIS) database.
Water resource investigations in Montana [More info]: Information on objectives, approach, status, and publications of various research projects investigating water resources in Montana including studies on wetlands, bridge scour, reconstructed wetlands, abandoned mine lands, and others.
Water resources activities in Texas - cooperating agencies [More info]: List of federal, state, regional, city and county agencies that cooperate with the USGS in water resources studies in Texas. Most have links to the agency's own website.
Water resources data for Washington [More info]: Access to data on water resources of Washington including surface water, ground water, water quality, water use, GIS, and biological datasets and access to reports.
Water resources for Maryland, Delaware, and Washington, D.C. [More info]: USGS water resources home page with links to detailed hydrologic information for Maryland, Delaware, and District of Columbia on ground and surface water, water quality, real-time records, news releases, local weather, and reservoir levels.
Water resources for Maryland, Delaware, and Washington, D.C. - District projects [More info]: List of current water resources projects being conducted by the U.S. Geological Survey in Maryland, Delaware, and the District of Columbia with links to dedicated websites, contacts, and project descriptions.
Water resources for Mississippi - local projects [More info]: Local projects of the Mississippi District Office on water resources of Mississippi including studies relating to erosion, floods, water data collection, ground water flow, Geographic Information Systems (GIS) techniques, and others.
Water resources of Alabama [More info]: USGS water resources home page for Alabama with links to hydrologic studies and real-time and long-term data on streamflow, surface water, drought conditions, rain, and water quality.
Water resources of Allen Parish [More info]: In 2005, about 29.2 million gallons per day (Mgal/d) of water were withdrawn here, including about 26.8 Mgal/d from groundwater sources and 2.45 Mgal/d from surface-water sources. Rice irrigation accounted for 74 percent (21.7 Mgal/d) of the total.
Water resources of Bossier Parish [More info]: In 2005, about 15.8 million gallons per day (Mgal/d) of water were withdrawn, including 4.12 Mgal/d from groundwater and about 11.7 Mgal/d from surface-water sources.Public supply use accounted for about 78 percent (12.4 Mgal/d) of the total water withdra
Water resources of Hawaii & the Pacific. [More info]: USGS water resources home page for Hawaii, Micronesia, and American Samoa with links to detailed hydrologic studies and real-time and long term data on streamflow, ground and surface water, water quality, rainfall, water use and current issues.
Water resources of Idaho [More info]: USGS water resources home page for Idaho with links to detailed hydrologic studies and real-time and long-term data on streamflow, ground and surface water, water quality, and water use, plus drought watch and relevant publications.
Water resources of Illinois [More info]: USGS water resources home page for Illinois with links to detailed hydrologic studies and real-time and long-term data on streamflow, ground and surface water, droughts, flooding, and water quality with highlights and project information.
Water resources of Indiana [More info]: USGS water resources home page for Indiana with links to detailed hydrologic studies and real-time and long-term data for streamflow, ground and surface water, drought, and water quality plus GPS ground station data and publications.
Water resources of Kansas - governmental cooperators of the USGS [More info]: List of local, state, and federal governmental agencies cooperating with the USGS in joint-funding arrangements to accomplish mutual goals in water resources studies in Kansas.
Water resources of Kentucky [More info]: USGS water resources home page for Kentucky with links to detailed hydrologic studies, real-time and historical data on streamflow, ground and surface water, flow duration, and water quality plus program highlights, contacts, and news.
Water resources of Louisiana [More info]: USGS water resources home page for Louisiana with detailed hydrologic studies and real-time and long-term data for streamflow, ground and surface water, water quality, and water supply with publications, contacts, and current conditions.
Water resources of Louisiana - main bibliography [More info]: Bibliography of linked and cross-referenced publications and products on Louisiana water resources searchable by geographic region, subject, parish, and author.
Water resources of Maine [More info]: USGS water home page for Maine with detailed hydrologic studies and real-time and long-term data for streamflow, ground and surface water, snow, and water quality plus drought watch, press releases, projects, and contacts.
Water resources of Maine - Projects [More info]: Summary of USGS programs in Maine relating to data collection and hydrologic studies of streamflow, ground water, coastal areas, and ecosystems.
Water resources of Massachusetts and Rhode Island [More info]: USGS water resource home page for Massachusetts and Rhode Island with detailed hydrologic studies and historic and real-time data on streamflow, ground and surface water, basins, floods, droughts, and water quality, plus district news.
Water resources of Michigan [More info]: USGS water resources home page for Michigan with links to detailed hydrologic studies and historic and real-time data on streamflow, ground and surface water, weather, water management, droughts, floods, and water quality.
Water resources of Michigan - programs and projects [More info]: Brief descriptions of categories of USGS research programs and projects on water resources in Michigan with links to more detailed information on projects.
Water resources of Michigan - protection of drinking water sources [More info]: Links to descriptions, publications, and photos of research projects in Michigan related to drinking water including source assessment, ground water availability, water resources, and contaminants in water.
Water resources of Michigan - restoring natural flow regimes [More info]: Links to descriptions, maps, photos, and reports of projects related to studies of the effects of dams and flow regulation in watersheds altered by humans in the state of Michigan including Muskegon and Kalamazoo Rivers and the Seney refuge.
Water resources of Michigan - water availability [More info]: Links to project descriptions and publications for research studies of water availability in Michigan.
Water resources of Minnesota [More info]: USGS water resource home page for Minnesota with links to detailed hydrologic studies and historic and real-time data for streamflow, ground and surface water, floods, and water quality plus district information.
Water resources of Mississippi [More info]: USGS water resources home page for Mississippi with links to detailed hydrologic studies and real-time and long-term data for streamflow, ground and surface water, precipitation, local weather, and flooding plus current events, projects and reports.
Water resources of Missouri [More info]: Water District homepage with links to detailed real-time and long-term water resources data for Missouri on streamflow, ground and surface water, and water quality.
Water resources of Missouri - Missouri District cooperating agencies [More info]: Links to the web pages of federal, state, regional and local agencies and university cooperating with the USGS in the collection of water-resources data and the conduct of interpretive hydrologic investigations in Missouri.
Water resources of Missouri - hydrologic studies and research [More info]: Links to USGS research project summaries and publications on water resources in Missouri.
Water resources of Montana [More info]: USGS water resources home page for Montana with links to detailed hydrologic studies and historic and real-time data on streamflow, ground and surface water, floods, and water quality plus publications and district information.
Water resources of Montana - our cooperators [More info]: List of federal, state, tribal, and local agencies cooperating with the USGS on water resources studies of Montana.
Water resources of Nebraska [More info]: USGS water resources home page for Nebraska with links to hydrologic studies and historic and real-time data on streamflow, ground and surface water, and water quality plus publications and related natural resources information.
Water resources of Nevada [More info]: USGS water resources home page for Nevada with links to detailed hydrologic studies and long-term and real-time data on streamflow, ground and surface water, droughts, and water quality plus district and publications information.
Water resources of New Hampshire and Vermont [More info]: USGS water resources home page for New Hampshire and Vermont with links to hydrologic studies and historic and real-time data on streamflow, ground and surface water, water use, and water quality plus publications and district information.
Water resources of New Jersey [More info]: USGS water resources home page for New Jersey with links to hydrologic studies and historic and real-time data on streamflow, ground and surface water, droughts, weather, and water quality plus district information.
Water resources of New Mexico [More info]: USGS water resources home page for New Mexico with links to hydrologic studies and real-time and long-term data on streamflow, ground and surface water, and water quality plus map of basins.
Water resources of New York [More info]: USGS water resources home page for New York with links to current news and features, real-time and long-term data on acid rain, suspended sediment, ground and surface water, streamflow and water quality.
Water resources of North Carolina [More info]: USGS water resources home page for North Carolina with links to hydrologic studies and long-term and real-time data on streamflow, ground and surface water, floods, droughts, precipitation, and water quality plus district information.
Water resources of North Carolina - current district projects [More info]: Links to description, publications, data, and maps for research projects on North Carolina water resources.
Water resources of North Dakota [More info]: USGS water resources home page for North Dakota with links to hydrologic studies and long-term and real-time data on streamflow, ground and surface water, droughts, and water quality plus district and publications information.
Water resources of North Dakota - publications [More info]: Searchable database for publications on water resources of North Dakota.
Water resources of Ohio [More info]: USGS water resources home page for Ohio with links to hydrologic studies and long-term and real-time data on streamflow, ground and surface water, weather, water use, and water quality, plus district and publications information.
Water resources of Oklahoma [More info]: USGS water resources home page for Oklahoma with links to hydrologic studies and long-term and real-time data on streamflow, ground and surface water, climatology, droughts, and water quality plus district and publications information.
Water resources of Oklahoma list of publications [More info]: List of publications related to Oklahoma water resources. Some on-line publication files are in PDF format.
Water resources of Oregon [More info]: USGS water resources home page for Oregon with links to hydrologic studies and historic and real-time data on streamflow, ground and surface water, geographic information, and water quality plus district and publications information
Water resources of Pennsylvania [More info]: USGS water resources home page for Pennsylvania with links to hydrologic studies and historic and real-time data on streamflow, ground and surface water, map/GIS information, and water quality plus district and publications information
Water resources of South Carolina [More info]: USGS water resources home page for South Carolina with links to detailed hydrologic studies and real-time data on streamflow, ground and surface water, GIS information, acid rain, and water quality plus district and publications information.
Water resources of South Dakota [More info]: USGS water resources home page for South Dakota with links to detailed hydrologic studies and historic and real-time data on streamflow, ground and surface water, and water quality plus district and publications information.
Water resources of Tennessee [More info]: USGS water resources home page for Tennessee with links to detailed hydrologic studies and long-term and real-time data on streamflow, ground and surface water, and water quality plus district and publications information.
Water resources of Texas - USGS activities in Texas [More info]: USGS water resources home page for Texas with links to historic and real-time data on streamflow, ground and surface water, floods, droughts, coastal storm surge, lakes and reservoirs, and water quality plus district and publications information.
Water resources of Utah [More info]: USGS water resources home page for Utah with links to detailed hydrologic studies and long-term and real-time data on streamflow, ground and surface water, and water quality plus district and publications information.
Water resources of Vernon Parish [More info]: In 2005, about 6.67 million gallons per day (Mgal/d) of water were withdrawn here, including about 6.46 Mgal/d from groundwater sources and 0.21 Mgal/d from surface-water sources. Public-supply use accounted for about 76 percent (5.06 Mgal/d) of the total
Water resources of Virginia [More info]: USGS water resources home page for Virginia with links to detailed hydrologic studies and historic and real-time data on streamflow, ground and surface water, flooding, and water quality plus district and publications information.
Water resources of Virginia - Total Maximum Daily Load [More info]: Description of a project to develop watershed models that can be used to track sources of fecal coliform bacteria by assigning Total Maximum Daily Loads (TMDL) to three stream segments in Virginia.
Water resources of Virginia - Virginia aquifer susceptibility [More info]: Overview of a project in Virginia to develop a program for assessing public supply source waters to determine their susceptibility to contamination and to determine which systems need detailed source-water assessments.
Water resources of Virginia - chloride monitoring network [More info]: Description of project to study the distribution of saline water in the aquifers of the Coastal Plain of Virginia and the potential for saline water intrusion by evaluating chloride concentrations and the factors affecting chloride distribution.
Water resources of Virginia - floods [More info]: Brief description of project for the Federal Emergency Management Agency to prepare and modify Flood Insurance Rate Maps based on flood frequency analysis, ground surveys, and flood profiles in Virginia.
Water resources of Virginia - river input monitoring [More info]: Description of river input monitoring project's collecting and analyzing water-quality data to calculate and explain load and trend estimates of selected nutrients and suspended solids for five major river basins in the Chesapeake Bay watershed.
Water resources of Virginia - small basin runoff [More info]: Overview of a project to evaluate existing methods used by Virginia Dept. of Transportation to estimate flood hydrographs from small drainage basins, and evaluate the use of dimensionless hydrographs to estimate runoff volumes.
Water resources of Washington State [More info]: USGS water resources home page for Washington State with links to detailed hydrologic studies and real-time data on streamflow, ground and surface water, water use, and water quality, plus GIS data, district and publications information.
Water resources of Washington State - Flood hazards [More info]: Description of the Flood Hazards study project by Water Resources Program in Tacoma, Washington with links to other flood hazard projects.
Water resources of Washington State - projects/studies [More info]: List of links to USGS research and studies on the water resources of Washington, which can be searched by subject, basin and county.
Water resources of Webster Parish [More info]: In 2005, about 9.52 million gallons per day (Mgal/d) of water were withdrawn, including about 9.33 Mgal/d from groundwater and 0.19 Mgal/d from surface-water. Public supply use accounted for 70% of the total.
Water resources of West Virginia [More info]: USGS water resources home page for West Virginia with links to detailed hydrologic studies and historic and real-time data on streamflow, ground and surface water, water use, and water quality, plus district information and press releases.
Water resources of Wisconsin [More info]: USGS water resources home page for Wisconsin with links to detailed hydrologic studies and historic and real-time data on streamflow, ground and surface water, water use, and water quality, plus district and publications information.
Water resources of Wyoming [More info]: USGS water resources home page for Wyoming with links to detailed hydrologic studies and long-term and real-time data on streamflow, ground and surface water, droughts, and water quality plus district and publications information.
Water resources of the Caribbean [More info]: USGS home page for the Caribbean, U.S. Virgin Islands, and Puerto Rico with links to projects, GIS data, publications, and real-time data for streamflow and rainfall of Puerto Rico, U.S. Virgin Islands, El Salvador, Guatemala, and Honduras.
Water resources of the United States [More info]: Primary homepage for USGS programs in water resources with links to water data, publications and products, technical resources, major programs, and water information services.
Water resources of the United States - current policy memorandums [More info]: Technical water resources memoranda arranged by general subject (ground water, surface water, policy and safety, and publishing) or by organizational unit (National Water Quality Lab, Branch of Quality Systems, and Branch of Systems Analysis).
Water resources real-time data for the Nation [More info]: Access to national water resources real-time data typically recorded at 15-60 minute intervals, stored onsite, and then transmitted to USGS offices every 4 hours. Select for site information, ground water, surface water, and water quality.
Water science for schools: Earth's water - surface water [More info]: Educational site for elementary school students with information on surface water (rivers, streams, lakes, floods).
Water science for schools: water use in the United States [More info]: Educational site for elementary school students on water use in the United States.
Water site information for the Nation [More info]: The Site Inventory System provides inventory of and access to data for sites at stream reaches, wells, test holes, springs, tunnels and other hydrologic locations where hydrologic data is collected by the USGS. Data can be viewed or downloaded.
Water use in Florida, 2005 and trends 1950-2005 [More info]: Explains many activities in which water is used, with statistics on how much water is used in each activity.
Water use in Tennessee [More info]: Tennessee water-use information including links to a fact sheet, data, charts, and maps.
Water use in the United States [More info]: Links to water use reports for the United States for 1985, 1990, and 1995 comparison of use and renewable water supply by region, handbook for collecting water-use data, and other information on national water use.
Water use trends in Washington, 1985-2005 [More info]: Summary of water use by major category through the last few decades in the state.
Water, Energy, and Biogeochemical Budgets (WEBB) [More info]: Describes the studies of five small watersheds, four in the U.S. and one in Puerto Rico, under the WEBB program to understand the processes controlling water, energy, and biogeochemical fluxes with links to other watershed research.
Water-Level Changes in the High Plains Aquifer, Predevelopment to 2002, 1980 to 2002, and 2001 to 2002 [More info]: Data from some 7,000 wells monitoring annual water level changes in the High Plains aquifer indicting changes in water level 1980 to 2002.
Water-quality data for Alabama [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Alaska [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Arizona [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Arkansas [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for California [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Colorado [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Connecticut [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Delaware [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for District of Columbia [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Florida [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Georgia [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Hawaii [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Idaho [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Illinois [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Indiana [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Iowa [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Kansas [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Kentucky [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Louisiana [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Maine [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Maryland [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Massachusetts [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Michigan [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Minnesota [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Mississippi [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Missouri [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Montana [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Nebraska [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Nevada [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for New Hampshire [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for New Jersey [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for New Mexico [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for New York [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for North Carolina [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for North Dakota [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Ohio [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Oklahoma [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Oregon [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Pennsylvania [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Rhode Island [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for South Carolina [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for South Dakota [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.
Water-quality data for Tennessee [More info]: Consistent, historic, and up-to-date water-quality data, such as temperature, specific conductance, pH, nutrients, pesticides, and volatile organic compounds downloadable from the USGS National Water Information System as graphs, tables, or files.

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