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Earth sciences
Broad term for all science related to the study of the earth.
Subtopics:
Atmospheric sciences (44 items)
Geochemistry (176 items)
Geography (159 items)
Geology (470 items)
Geophysics (117 items)
Glaciology (8 items)
Hydrology (410 items)
Limnology (19 items)
Ocean sciences (51 items)
Paleontology (21 items)
Soil sciences (5 items)
Related topics:


Results 693 - 1330 of 1330 listed alphabetically [list by similarity]
National Aerial Photography Program (NAPP)- Ordering Aerial Photography [More info]
Enables locating and ordering aerial photography produced under the National Aerial Photography Program (NAPP)from the EROS data center with links to product description, prices, search & order, custom enlargements and certification.
National Assessment of Coastal Change Hazards [More info]
The National Assessment of Coastal Change Hazards is a multi-year undertaking to identify and quantify the vulnerability of U.S. shorelines to coastal change hazards such as the effects of severe storms, sea-level rise, and shoreline erosion and retreat.
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 Atlas Map Maker - Map layers [More info]
Links to hundreds of map layers of geospatial information listed by subjects for use with the National Atlas Map Maker to assemble, view, and print customized maps using one or more of the layers.
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 Earthquake Information Center [More info]
Information on world earthquake activity with links to facts and lists on large earthquakes, earthquake e-mail notification, hazards and preparedness, educational links, news and highlights and other seismic information.
PDF National Enhanced Elevation Assessment at a glance [More info]
We asked what enhanced elevation data people need, what would be the costs and benefits, and what would be the best ways to obtain these data.
National Geologic Map Database Catalog [More info]
Search tool for locating print and online U.S. geologic maps by area, title, author, etc.
National Geologic Map Database Geologic Names Lexicon GEOLEX [More info]
Search tool for locating lithologic and geochronologic unit names for geologic studies.
National Geological and Geophysical Data Preservation Program [More info]
Operational program designed to facilitate the inventory and preservation of geological and geophysical data in US Federal agencies, state agencies, and universities.
National Geomagnetism Program [More info]
Overview of USGS programs related to geomagnetism including observatories, data, program services, links to models, charts, and movies, program contacts, Intermagnet, Geomag, publications, and bibliographies.
National Geospatial Program [More info]
Provides leadership for USGS geospatial coordination, production and service activities.
National Geospatial Technical Operations Center [More info]
Organizational unit within USGS supporting acquisition and management of trusted geospatial data, products, and services needed for The National Map, the National Atlas, and related efforts.
National Handbook of Recommended Methods for Water Data Acquisition -- Chapter 11 - Water Use [More info]
Provides standards and guidance for measuring, estimating, collecting, and analyzing water-use data. Includes brief descriptions of water-use activities, commonly used water-use terminology, and approaches and methods used in estimating water use.
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 Ice Core Laboratory [More info]
The U.S. National Ice Core Laboratory (NICL) is a facility in the Denver Federal Center, Colorado, for long-term storage, curating, and studying ice cores recovered from the polar regions of the world with information on public tours.
National Landslide Information Center [More info]
National Landslide Information Center links to general information, teacher/student information, recent landslide events, state and local information, current projects, fire-related landslides, and images and publications on landslides.
National Mapping Program standards [More info]
Links to standards prepared under the National Mapping Program to produce and maintain top quality mapping and geospatial data products. Documents may be viewed and downloaded in PDF and HTML formats with links to related information.
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 Satellite Land Remote Sensing Data Archive [More info]
USGS Archive for preservation and access for satellite remote sensing data and imagery (Landsat and AVHRR). Links to locating and ordering imagery, international collaborators, advisory committee, and Earthshots (satellite photos.).
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.
PDF National Streamflow Information Program: Implementation Status Report [More info]
Describes and explains why and how USGS and its cooperators operate about 7,500 stream gages nationwide, the types of information we obtain from them, and the problems that can be addressed as a result.
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 Laboratory [More info]
The National Water Quality Laboratory (NWQL) is a full-service laboratory that specializes in environmental analytical chemistry and has a primary role to develop new analytical methods. Links to directory, publications, and standards.
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 (NAWQA) Program: reconstructed trends national synthesis study. [More info]
Program to compile data from the National Water-Quality Assessment Program study units to study national trends with links to sediment coring sites, video on Salt Lake City, study units identification, and publications.
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 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 field manual for the collection of water-quality data [More info]
Field manual (also available in PDF and paper formats) with instructions on techniques to collect and process water samples and to perform measurements of temperature, oxygen content, conductance, pH, turbidity, and fecal contaminants.
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 highway runoff water quality data and methodology synthesis [More info]
Cooperative national project with the Federal Highway Administration (FHWA) to evaluate FHWA's guidelines for highway-runoff quality. Links to searchable online bibliography of related publications by the USGS, EPA, FHWA, and state agencies.
PDF National hydrography dataset--linear referencing [More info]
Explains how the NHD specifies point locations within streams by using a code to indicate the reach (including the hydrologic unit) and a measure, which indicates how far the point is from the downstream end of the reach.
National research program (water resources), western United States [More info]
Home page for links to state district activities in water resources data collection, research, and analysis in the Western Region.
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 Hazards - Earthquakes [More info]
News and related information focusing on the importance of earthquake hazards in the United States.
Natural Hazards - Floods [More info]
News and related information focusing on the hazards associated with floods in the United States.
Natural Hazards - Landslides [More info]
News and related information focusing on the importance of landslide hazards in the United States.
Natural Hazards - Tsunamis [More info]
News and related information focusing on the importance of tsunami hazards in the United States.
Natural Hazards - Volcanoes [More info]
News and related information focusing on the hazards associated with volcanoes in the United States.
Natural Hazards Support System [More info]
Shows where current natural hazard events are occurring within the US or worldwide, with information about the geographic extent of the hazard, the US agency engaged to work on it, and how long the hazard is expected be active.
Natural gas hydrates: vast resources, uncertain future [More info]
Fact sheet (PDF format) on gas hydrates occurrence, recovery, and use as an energy source.
Natural gemstones [More info]
Online booklet on natural gemstones, terminology, geologic environment, birthstones, U.S. production, chemical formulas, and references.
Natural hazards: Hurricanes [More info]
News and related information focusing on the hazards associated with hurricanes in the United States.
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.
PDF 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.
PDF Nickel - Makes stainless steel strong [More info]
Uses, sources, and history of Nickel as a mineral commodity.
PDF Niobium and tantalum: indispensable twins [More info]
Explains why these elements are commonly discussed together, how they are used, where we get them, and prospects for future supply and demand.
PDF 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.
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.
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.
Nutrient dynamics and biochemical cycling [More info]
Briefly describes research efforts to better understand nutrient dynamics and biogeochemical cycling in ecosystems and how these properties are altered by large-scale human activities.
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.
Nutrients in the Nation's streams and groundwater: National findings and implications [More info]
Despite public sector efforts to reduce nonpoint-source nutrients in streams and rivers, concentrations have remained the same or increased, continuing to pose risks to aquatic life and human health.
PDF 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.
PDF 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.
PDF 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.
Office of Water Quality, Branch of Quality Systems [More info]
Branch of Quality Systems monitors the consistent collection and reporting of water-quality data with documentation of field and laboratory methods and proficiency testing. Links to standard reference samples and quality assurance standards.
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.
On-line data and reports on acid rain, atmospheric deposition, and precipitation chemistry [More info]
Access to map of data collection sites of the National Atmospheric Deposition Program/National Trends Network (NADP/NTN) with links to other maps and reports on wet atmospheric deposition (chemicals deposited via rain, sleet and snow).
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.
PDF Operational guidelines for geological fieldwork in areas endemic for Coccidioidomycosis (Valley Fever) [More info]
Report giving operational guidelines that will lower the risk of coccidioidomycosis (Valley fever) for individuals who work outdoors in areas where the disease is endemic.
Optical Science Laboratory [More info]
Site for the Optical Science Laboratory specializing in expert calibration of aerial mapping cameras with links to fees, scheduling cameras for calibration, historical camera database files, USGS aerial camera specifications, and how to visit.
PDF 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 Geochemistry Laboratory in Denver [More info]
Description of the Denver Organic Geochemistry Laboratory where chemical and geological data is used to research the physical and chemical processes of hydrocarbon generation, migration and accumulation, with links to programs, personnel, and products.
Organic Geochemistry Research Group in Kansas [More info]
The Organic Geochemistry Research Group of the Kansas District focuses on the fate and transport of organic contaminants in the environment with links to objectives, analytical methods, laboratory methods, publications, events, photos, and personnel.
PDF 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.
PDF 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.
PDF 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.
PDF 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.
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.
PDF 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.
Overview of the greenness of the conterminous U.S. [More info]
Site to learn about, view, and order digital image vegetation condition (greenness) maps of the conterminous U.S. based on the Normalized Difference Vegetation Index (NDVI) with imagery from Advanced High Resolution Radiometer (AVHRR).
Ozone in our air - friend or foe? - depends on where [More info]
Article on ozone layer and ozone as a pollutant from the weekly newsletter Volcano Watch (Hawaiian Volcano Observatory) for August 20, 2001.
P-wave data from the Indian subcontinent [More info]
Compilation of P-wave data from the Indian subcontinent Deep Seismic Sounding (DSS) profiles that used refraction and reflection techniques to provide an estimate of crustal thickness across the subcontinent.
PDF PAGER--Rapid assessment of an earthquake's impact [More info]
An automated system for rapidly estimating the shaking distribution, number of people and settlements exposed to severe shaking, and range of possible fatalities and economic losses. A color-coded alert suggests levels of appropriate response.
Pacific Northwest geologic mapping and urban hazards [More info]
Overview of the Pacific Northwest Urban Corridor Geologic Mapping Program concerned with geology and urban hazards with links to online geologic maps, current research, publications, and contacts.
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.
Paleomagnetism analyses [More info]
Links to laboratory capabilities within the USGS for paleomagnetism and paleomagnetic and rock magnetic procedures for dating and determination of magnetic direction and polarity in samples with links to techniques, equipment, and contacts.
Paleontological analyses [More info]
Links to USGS capabilities in paleontological analyses of fossils such as mollusks, diatoms, palynomorphs, ostracodes, calcareous nannofossils, etc. Includes descriptive information, technique, equipment, and contacts for each fossil group.
Paleontology at the U.S. Geological Survey [More info]
USGS Paleontology home page documenting the wide diversity in paleontologic studies and applications within the USGS.
Paleontology selected online resources [More info]
Selection of links to web sites dealing with paleontology and related disciplines including links to museums, academia, societies, surveys, and groups of fossils.
Parking-lot sealcoat: A major source of PAHs in urban and suburban environments [More info]
Explanation of chemical contaminants released into aquatic environments by popular sealcoating compounds used in parking lots, with frequently-asked questions, links, and contact information.
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.
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.
Periodic table page [More info]
An "image map" periodic table and short notes about many isotopes and their applications to illustrate the uses of assorted isotopes in hydrology, geology, and biology.
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.
PDF Pesticides in Ground Water of Wyoming, 1995-2006 [More info]
Summarizes ground-water pesticide monitoring results, shows vulnerability of aquifers to contamination.
PDF 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.
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.
Phosphorus and groundwater: Establishing links between agricultural use and transport to streams [More info]
Explains why phosphorus is important, how it moves through the terrestrial water system, how we measure it, and what this means for people who need to manage or monitor human activities that produce it.
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.
Photo glossary of volcano terms [More info]
Illustrates and describes commonly used volcano-related terms.
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.
PDF 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.
Planetary GIS web server - PIGWAD (Planetary Interactive G.I.S.-on-the-Web Analyzable Database) [More info]
Planetary Interactive G.I.S.-on-the-Web Analyzable Database (PIGWALD), an interface to support and integrate Geographic Information Systems (GIS) graphical, statistical, and spatial relational tools for analyses of planetary datasets.
PDF Platinum-group elements: so many excellent properties [More info]
These elements, abbreviated as PGE, include platinum, palladium, rhodium, ruthenium, iridium, and osmium. They have similar physical and chemical properties and occur together in nature.
Plus side of volcanoes: geothermal energy [More info]
Examples of the use of volcanic energy in geothermal power plants.
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
PDF 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.
PDF Potential for technically recoverable unconventional gas and oil resources in the Polish-Ukrainian Foredeep, Poland [More info]
Using a performance-based geological assessment methodology, we estimated mean volumes of 1,345 billion cubic feet of potentially technically recoverable gas and 168 million barrels of technically recoverable oil and natural gas liquids here.
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.
PDF Precambrian Time - The Story of the Early Earth [More info]
Explains what we know about the early history of the earth and how we study the deposits formed during that time to understand the formation of the earth and life.
PDF Preliminary Assessment of Non-Fuel Mineral Resources of Afghanistan, 2007 [More info]
Estimates of known and undiscovered copper resources total nearly 60 million metric tons of copper. Iron resources in known deposits total 2200 million metric tons of ore. Twenty mineralized areas meriting further study were identified.
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)
Preparing for volcanic emergencies [More info]
Describes activities of USGS scientists to increase public awareness of volcano hazards with links to publication and videos for public information on understanding and preparing for volcanic hazards.
Primer on water quality [More info]
Fact sheet on what "water quality" means, how it is determined, and the natural processes and human activities that affect it.
Principal aquifers can contribute radium to sources of drinking water under certain geochemical conditions [More info]
Knowledge of the geochemical processes controlling radium occurrence in groundwater may help water-resource managers anticipate and minimize human exposure to this cancer-causing element.
Produced waters database [More info]
Database provides information on petroleum reservoirs, type and abundance of constituents dissolved in produced water, geochemical reactions between the water and rock, hydrology and geologic, spatial distribution of petroleum production areas.
PDF Progress toward a safer future since the 1989 Loma Prieta earthquake [More info]
Summarizes what we have learned since this serious earthquake and how we have improved our preparedness for events such as this.
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.
Publications on Techniques of Water-Resources Investigations [More info]
List of publications in the series Techniques of Water-Resources Investigations on the procedures for the planning and conducting of specialized research in water resources.
Quadrangle indexes [More info]
GIS data files containing approximate boundaries of the various USGS quadrangles, with names and indexing codes associated with each quadrangle.
PDF 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.
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.
PDF Rare earth elements--End use and recyclability [More info]
Rare earth element use is changing with technology. This report explains how we use them and the prospects for recycling these important commodities.
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.
PDF 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 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.
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.
PDF Redox Conditions in Selected Principal Aquifers of the United States [More info]
Summarizes measurements of ground-water chemistry that affect the vulnerability of aquifers to contamination. Data are from aquifers throughout the conterminous US and Alaska.
PDF 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.
PDF 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.
PDF Relations among geology, physiography, land use, and stream habitat conditions in the Buffalo and Current River systems, Missouri and Arkansas [More info]
PDF 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.
PDF 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.
Report of the Community Sediment Transport Modeling Workshop [More info]
Report on workshop to explore a community approach to improving deterministic models of sediment transport in coastal seas, estuaries, and rivers.
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.
PDF 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.
PDF 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.
Reston Chlorofluorocarbon Laboratory [More info]
Site on the Chlorofluorocarbon Laboratory and its analytical services for CFCs, sulfur hexafluoride, dissolved gases including nitrogen, argon, methane, carbon dioxide, oxygen, and helium, and tritium/helium-3 dating.
Reston Stable Isotope Laboratory [More info]
The Reston Stable Isotope Laboratory conducts research on the use of isotope ratio measurements in studies of water resources and environmental quality.
PDF Review of flow rate estimates of the Deepwater Horizon oil spill [More info]
We assess the degree to which a consensus was reached on the flow rate of the well by comparing in situ observations with a time-dependent flow rate model derived from pressure readings taken after the Macondo well was shut in for the well integrity test.
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.
Rocky Mountain Geographic Science Center [More info]
A wide variety of web interfaces providing scientific information in geographic form for exploration and analysis, developed by this organization that focuses on geospatial analysis.
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.
PDF 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.
PDF SEAWAT: A Computer Program for Simulation of Variable-Density Groundwater Flow and Multi-Species Solute and Heat Transport [More info]
Software based on the MODFLOW modeling framework, used for studies of saltwater intrusion coastal aquifers, storage and recovery in brackish limestone aquifers, and brine migration in continental aquifers.
SPARROW Modeling of Surface-Water Quality [More info]
A software model for regional interpretation of water-quality monitoring data, estimating origin and fate of contaminants in streams, with documentation, publications and data for the applications.
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.
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.
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.
PDF Satellite map of Port-au-Prince, Haiti - 2010 - infrared [More info]
Post-earthquake map derived from 1:24,000-scale base maps incorporating high- and medium-resolution remotely sensed imagery following the 7.0 magnitude earthquake near the capital city of Port au Prince, Haiti, on January 12, 2010
PDF Satellite map of Port-au-Prince, Haiti - 2010 - natural color [More info]
Post-earthquake map derived from 1:24,000-scale base maps incorporating high- and medium-resolution remotely sensed imagery following the 7.0 magnitude earthquake near the capital city of Port au Prince, Haiti, on January 12, 2010
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.
PDF Scanning and georeferencing historical USGS quadrangles [More info]
We are scanning all scales and all editions of approximately 250,000 topographic maps published by USGS since the inception of the topographic mapping program in 1884. They will be available to the public at no direct cost.
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.
PDF Science challenge questions and answers [More info]
Report giving a collection of 196 questions and answers on Earth and planetary sciences, such as volcanoes, earthquakes, hydrology, cartography, biology, and minerals for general audiences. Also information on obtaining an audio-CD copy.
Science education and USGS [More info]
Information for students and teacher or for anyone curious about natural science. Includes project ideas, homework help, lesson plans, careers, and fun activities.
PDF Science implementation of Forecast Mekong for food and environmental security [More info]
Research activities and data sources for this international effort to enhance U.S. engagement with countries of the lower Mekong River basin.
PDF Science supporting Gulf of Mexico oil-spill response, mitigation, and restoration activities-Assessment, monitoring, mapping, and coordination [More info]
Explains and shows data and expertise we were able to provide to Federal agencies and decision makers to help them deal with this difficult situation.
PDF 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.
PDF 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.
PDF Science-Based Strategies for Sustaining Coral Ecosystems [More info]
Explains the environmental factors that affect coral reef habitats and ecosystems, focusing on those that pose urgent problems.
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 in action! [More info]
Website with brief articles on careers in the natural sciences with examples of work of USGS scientists from responding to disasters, studying national parks, sampling the ocean floor, and protecting wildlife.
Sea-floor mapping technology [More info]
Integrated shipboard data collection, processing, and archival system for digital sidescan sonar and seismic data used in mapping the inner continental shelf.
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.
Seabed Observation and Sampling System (SEABOSS) [More info]
Link to PDF fact sheet describing the SEABASS system that collects seabed images and sediment samples in coastal regions.
PDF 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.
Seamless geographic data distribution system [More info]
Online map system providing downloadable geospatial data, primarily NSDI framework themes (that is, general geographic data such as transportation, boundaries, hydrography, orthoimagery, land cover, and elevation).
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 Transport Instrumentation Facility [More info]
The Sediment Transport Instrumentation Facility at USGS Woods Hole Field Center maintains and deploys oceanographic instrumentation for the study of coastal and ocean circulation and sediment transport.
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.
Selected Western Region Mineral Resources on-line publications [More info]
Links to digital publications on minerals and mineral resources research in the western United States.
Selected references on fossils and paleontology [More info]
Bibliography of books, periodicals, fossil collecting guides, audiovisual aids, videos, filmstrips, charts, and posters which may be borrowed from libraries or purchased if still available.
Selected volcano information [More info]
Selected books, maps, videos, and other materials produced by the USGS Volcano Hazards Program. Many products highlighted here are intended for general audiences.
Sense of place: a place-based approach to science for land management [More info]
Examples of on-site, place-focused research programs using USGS scientists in land management projects.
Severity of an earthquake [More info]
Description of intensity and magnitude as indicators of the size of an earthquake and the levels of severity measured on the Richter Magnitude Scale and the Modified Mercalli Intensity Scale.
ShakeMap [More info]
ShakeMap sites provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.
Sinkholes [More info]
Explains sinkhole formation and distribution, with special emphasis on their occurrence in Missouri
PDF Slope-Area Computation Program Graphical User Interface 1.0--A Preprocessing and Postprocessing Tool for Estimating Peak Flood Discharge Using the Slope-Area Method [More info]
Explains how to use this command-line software to estimate peak flood discharge using indirect measures such as high water marks on trees or buildings.
SolVES - Social values for ecosystem services [More info]
GIS application for assessing, mapping, and quantifying the social value of ecosystem services. Helps decision makers consider tradeoffs among them with the human attitudes and preferences that express underlying social values.
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.
Solar-irradiance variations and regional precipitations in the western United States [More info]
Study of the relationship of changes in total solar irradiance to changes in regional precipitation in the western United States as affected by water circulation in the Pacific Ocean.
PDF 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.
Sound waves [More info]
Monthly online newsletter covering coastal and marine science with links listed under sections titled fieldwork, meetings, outreach, and research.
Source Water-Quality Assessment [More info]
Characterize the quality of selected rivers and aquifers used as a source of supply to community water systems in the United States to determine the occurrence of about 280 primary unregulated anthropogenic organic compounds.
PDF 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) 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.
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.
PDF 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.
PDF Space Acquired Photography [More info]
These photographs were taken by Gemini mission astronauts with handheld cameras or by the Large Format Camera (LFC) that flew on space shuttle Challenger in October 1984.
Space Acquired Photography [More info]
Ordering and descriptive information for National Aeronautics and Space Administration (NASA) imagery acquired by the USGS from Gemini, Apollo, Skylab, International Space Station, Space Shuttle, and Shuttle Large Format Camera missions.
Spatial Analysis Branch, National Wetlands Research Center [More info]
Home page for National Wetlands Research Center's (NWRC) Spatial Analysis Branch (SAB), which uses state-of-the-art technology to assist the work of natural resource managers with spatial data and computerized analysis techniques.
Spatial Data Transfer Standard (SDTS) information site [More info]
Homepage for ISGS Spatial Data Transfer Standard (SDTS) information with links to software, FTP site, standard, and data available on line, USGS mass conversion schedule, meetings, and related web sites.
Spectroscopy Lab [More info]
Links to Spectroscopy Lab projects to identify and map materials through spectroscopic remote sensing (imaging spectroscopy, hyperspectral imaging, imaging spectrometry, ultraspectral imaging, etc) on the Earth and in space.
Spectroscopy of rocks and minerals, and principles of spectroscopy [More info]
Technical review of the principles of spectroscopy and its use in identifying minerals and other materials.
PDF 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.
PDF 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.
Standard reference samples for water quality analysis [More info]
Standard reference samples for laboratory quality assurance testing and are available to purchase for internal quality control. The majority of samples are prepared with water from Colorado streams.
State Water Resources Research Institute Program [More info]
Homepage of the Water Resources Research Institute (WRRI) Program with links to institutes, projects, and programs.
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.
PDF 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.
PDF 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.
PDF 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.
Student employment in the U.S. Geological Survey [More info]
The U.S. Geological Survey (USGS) offers diverse employment opportunities for students in biology, hydrology, computer science, cartography, geology, and other fields. Site provides links to student programs and how to apply.
PDF 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 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.
Studying ocean acidification in the Arctic Ocean [More info]
New synoptic data from samples collected in the Arctic Ocean and insights into the patterns and extent of ocean acidification. This foundational geochemical information will help us to understand potential risks to Arctic resources.
PDF Suggestions to authors of the reports of the USGS [More info]
The writing style guide for USGS technical reports and maps. The STA is widely distributed in paper outside of the USGS as a basic scientific writing style guide for scientists, students.
PDF Summaries and data packages of important areas for mineral investment and production opportunities in Afghanistan [More info]
Shows where important mineral resources are located in Afghanistan, the type of deposits there, the commodities that are present, and describes the data available to support further exploration and exploitation of these resources.
PDF 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.
PDF 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.
PDF Summary of the diamond resource potential and production capacity assessment of Guinea [More info]
Describes organizational process and field study used to estimate production capacity (mostly by artisanal miners) in the parts of the country likely to contain diamonds. We estimate a production capacity of 600,000 carats per year.
PDF Summary of the reconnaissance investigation of the diamond resource potential and production capacity of Côte d'Ivoire [More info]
Study integrating archival reports and maps, satellite imagery, and terrain modeling to estimate resource reserves of 11,200,000 carats in two regions of the country.
Surface water information pages [More info]
Lead page for detailed United States surface water information with links to real-time and historic streamflow data, suspended sediment data, USGS programs and facilities, publications, techniques, and featured news releases.
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 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.
Surface-water quality and flow Modeling Interest Group (SMIG) [More info]
The USGS Surface-water quality and flow Modeling Interest Group (SMIG) is interested in surface-water quality and flow modeling activities with links to articles, model archives, data archives, clearinghouse, mailing list, classes, and meetings.
Surface-water reports [More info]
Links to Office of Surface Water reports on streamgaging, streamflow data and information, current meters, sediment, modeling, journal articles, and techniques.
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.
PDF 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.
PDF Sustainability of natural attenuation of nitrate in agricultural aquifers [More info]
Nitrate from fertilizer is degraded by microbial action in the presence of solid minerals. This helps mitigate the effect of the nitrate, but begins to diminish the solid minerals needed. Will the process be sustainable in the long term?
PDF Sutter Buttes-the lone volcano in California's Great Valley [More info]
Explains history and structure of this unusual geologic feature.
Tampa Bay Estuary Interactive Mapping System (IMS) [More info]
Interactive Mapping Service (IMS) is an Internet based Geographic Information System designed to provide users with online mapping capability of habitats, land use and land cover, and seagrass for areas of Tampa Bay.
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.
Tampa Bay estuary digital library [More info]
Database entry page to search keywords and product type (document, map, data, metadata, photos, video, animation, aerial photo) for information on the Tampa Bay estuary and related research studies.
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.
PDF 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.
PDF Terrestrial essential climate variables (ECVs) at a glance [More info]
Explains 16 distinct types of scientific information that are needed to understand climate change, including the specific parameters measured, why they are needed, who measures them, and the type and amount of information that are not yet available.
PDF The 1964 Great Alaska Earthquake and tsunamis--a modern perspective and enduring legacies [More info]
Summarizes what we learned about this historic earthquake and how our ability to monitor and respond to events of this type have changed, including our awareness of tsunami effects.
PDF The 3D Elevation Program: Summary of Program Direction [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Alabama [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Alaska [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Arizona [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state.
PDF The 3D Elevation Program: summary for Arkansas [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state.
PDF The 3D Elevation Program: summary for California [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Colorado [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Florida [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Georgia [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state.
PDF The 3D Elevation Program: summary for Hawaii [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state.
PDF The 3D Elevation Program: summary for Idaho [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Illinois [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state.
PDF The 3D Elevation Program: summary for Kentucky [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Louisiana [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Maine [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Maryland [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Massachusetts [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state.
PDF The 3D Elevation Program: summary for Minnesota [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Mississippi [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state.
PDF The 3D Elevation Program: summary for Missouri [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Montana [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for New Jersey [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state.
PDF The 3D Elevation Program: summary for New Mexico [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for New York [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for North Carolina [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state.
PDF The 3D Elevation Program: summary for North Dakota [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Oklahoma [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Oregon [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Rhode Island [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for South Dakota [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Tennessee [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Texas [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Virginia [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Washington [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF The 3D Elevation Program: summary for Wisconsin [More info]
Summarizes the expected value over the next decade of the 3D Elevation Program for this state
PDF 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.
PDF 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.
PDF 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 Earth's crust [More info]
Information on the Earth's crust with a contour map of the thickness plus links to a global crustal database, a global crustal model - CRUST 5.1, and regional crustal models.
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 Geologic Time Spiral - A Path to the Past [More info]
Poster depicting the changes in the Earth and its life throughout its history.
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 Great Ice Age [More info]
Booklet (PDF format) on the Pleistocene glaciations known as the Great Ice Age and the resulting geomorphological, climatic, and environmental changes that occurred on Earth during the period.
PDF 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 Lewis and Clark expedition and the USGS [More info]
Because of its origin in natural resource surveys and the similarity of the USGS mission to Thomas Jefferson's charge to Meriwether Lewis, the USGS can be seen as the organizational successor to Lewis and Clark.
The Marine Realms Information Bank family of digital libraries: Access to free online information for coastal and marine science [More info]
An introduction to three related USGS digital libraries: the general-purpose Marine Realms Information Bank (MRIB); the regionally focused Monterey Bay Science (MBS) Digital Library; and the topically focused Coastal Change Hazards (CCH) Digital Library.
PDF 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.
PDF The National Land Cover Database [More info]
The National Land Cover Database (NLCD) serves as the definitive Landsat-based, 30-meter resolution, land cover database for the Nation.
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 Corps [More info]
Explains how to get involved in The National Map as a volunteer by contributing information gathered using new technology.
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 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 Stanford-U.S. Geological Survey SHRIMP ion microprobe--a tool for micro-scale chemical and isotopic analysis [More info]
Instrument measures elemental abundance and isotopic ratios in samples as small as a few nanograms. Uses include geochronology, geological thermometry, and trace element geochemistry of geological and biological materials.
The U.S. Geological Survey Ocean Bottom Seismometer Facility [More info]
The Ocean Bottom Seismometer facility provides technical support for a variety of scientific investigations ranging from deep crustal structure to gas hydrate and surface sediments.
PDF The U.S. Geological Survey's TRIGA reactor [More info]
USGS operates a low-enriched uranium-fueled, pool-type reactor located at the Denver Federal Center. We use it for analyses of fissile and fissionable isotopes, geochemical analysis, and geochronology.
The USGS role in Total Maximum Daily Load (TMDL) assessments [More info]
Detailed information on Total Maximum Daily Load, the total quantity of a pollutant that a stream can carry and still conform to water quality standards, used as a measurement in the monitoring, assessment, and remediation of polluted waters.
PDF 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 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.
PDF The concept of geologic carbon sequestration [More info]
Explains securing carbon dioxide in deep geologic formations to prevent its release to the atmosphere and contribution to global warming as a greenhouse gas.
The crustal structure of China from deep seismic sounding profiles [More info]
Summary of results of Deep Seismic Sounding (DSS) profiles in China with links to a sample DSS profile, contour map of China with crustal thickness, crustal columns and maps showing profile locations and seismic data.
PDF The future of rare earth elements--will these high-tech industry elements continue in short supply? [More info]
Presentation describing uses of rare earth elements, why they are important, where they occur and are produced, and aspects of the economics of production and consumption with emphasis on sites that might be developed for production.
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.
PDF The life cycle of a mineral deposit - A teacher's guide for hands-on mineral education activities [More info]
Defines what a mineral deposit is and how a mineral deposit is identified and measured, how mineral resources are extracted, and how a mine site is reclaimed; how minerals are processed; and how we use minerals in everyday life.
PDF 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 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.
PDF 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.
PDF Thermal Properties of Methane Gas Hydrates [More info]
This unusual form of hydrocarbons can alter the thermal properties of host sediments; the analysis presented here helps us understand how those sediments might behave under natural or human-induced changes in the environment.
This dynamic Earth: the story of plate tectonics [More info]
Online booklet giving an introduction to the concept of plate tectonics and complements the information on the map This Dynamic Planet published in 1994 by the U.S. Geological Survey (USGS) and the Smithsonian Institution.
PDF This dynamic planet: World map of volcanoes, earthquakes, impact craters, and plate tectonics [More info]
Online world map with booklet (PDF format) giving an account of plate tectonics, volcanology, earthquake activity, and impact craters.
PDF 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.
PDF 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.
Topics in coastal and marine sciences: Coastal erosion [More info]
Topics in Coastal and Marine Sciences provides background science materials, definitions, and links to give a common context for users from a variety of backgrounds. Coastal erosion was chosen as the first topic.
Topographic Science [More info]
Explains and illustrates the types of topographic information USGS obtains, how we use this information, and how to obtain topographic data for your own work.
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.
Toxic Substances Hydrology Program [More info]
Homepage for the Toxic Substances Hydrology Program, which provides scientific information on contaminated sites and on human and environmental health. Links to news, topical information, investigations, meetings, publications, and photos.
PDF 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.
PDF 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.
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.
Types and effects of volcano hazards [More info]
Describes the 6 main types of hazardous activities and processes associated with volcanoes, including tephra, lava flows, pyroclastic flows, lahars (volcanic mudflows), landslides, and volcanic gas.
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. Geological Survey (USGS) [More info]
Homepage for the U.S. Geological Survey, Department of the Interior, serving as portal to all USGS information with search options, USGS in the news, most frequently requested topics, and access to major categories of USGS information.
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.
PDF U.S. Geological Survey Community for Data Integration-NWIS Web Services Snapshot Tool for ArcGIS [More info]
Software used within GIS allowing streamflow, water level, and water quality data to be obtained on demand through the Internet.
PDF 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.
PDF U.S. Geological Survey disaster response and the International Charter for space and major disasters [More info]
How we support an international agreement designed to facilitate the use of remote sensing data for assisting when major disasters occur anywhere on earth.
PDF 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. Gulf of Mexico Shoreline Change [More info]
Interactive map of the Gulf of Mexico coast reflecting shoreline changes.
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.
PDF 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.
PDF USGS EDMAP Program-Training the Next Generation of Geologic Mappers [More info]
How to apply for funding for students to complete geologic mapping projects, with a list of universities who have participated in the program.
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 Geography Products [More info]
USGS mapping sciences page containing links describing cartographic and geographic products and programs. The information products are available in printed and digital formats.
USGS Global Change Science [More info]
Broad overview of USGS research and monitoring designed to understand current changes in the context of prehistoric and recent earth processes, distinguishing between natural and human-influenced changes, and recognizing ecological and physical responses
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.
PDF 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 Luminescence Dating Laboratory [More info]
The USGS Luminescence Dating Laboratory in the Denver Federal Center, Colorado, is a facility for determining the age of sedimentary and volcanic ash deposits using luminescence dating with information on sample collection and laboratory methods.
USGS National Map of Surficial Mineralogy [More info]
Maps of exposed surface mineral groups derived from automated spectral analysis of satellite and airborne imaging systems; these data suggest areas that may contain mineral deposits of various types.
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 Reference Materials Program: Serving the needs of the global analytical community [More info]
Synopsis of the research and services provided by USGS in support of reference materials used for calibration in laboratory analytical studies.
USGS Science: Addressing Our Nation's Challenges [More info]
Overview of USGS scientific goals and activities framed as responses to national and global problems.
PDF 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.
PDF 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 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 and the Southern California Integrated GPS Network (SCIGN) [More info]
Field Office involved in operating GPS stations, data recording, and supplying of earthquake data. Links to GPS data analysis, photos, and technical information.
USGS develops geophysical methods to improve remediation monitoring and site characterization [More info]
Short news article describing the use of electrical resistivity tomography to improve imaging of tracer flow in ground water.
USGS fact sheets [More info]
Access and listing of popular USGS publications listed by themes: resources, hazards, environment, information management, and states, and also by scientific discipline.
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 image collections [More info]
Homepage to access a large number of photograph collections on many subjects including national parks, ecosystems, plants and animals, and geologic features.
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 multimedia gallery [More info]
Photographs of landscapes, earth history, waterways, wildlife, changing worlds, and earth scientists.
USGS news and information on El Nino [More info]
Information sources on El Nino effects such as landslides, coastal hazards, floods. Includes links to maps and images.
USGS projects in Afghanistan [More info]
Presents scientific expertise, geospatial data, and remote sensing technologies to help assess Afghanistan's natural resources and strengthen its earth science capabilities.
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 recreation site: your science gateway for safe and vital enjoyment of the outdoors [More info]
Gateway to useful USGS websites for recreation in nature watching and exploring, boating, camping, climbing, fishing, hiking, biking, and hunting, with links to maps, real-time streamflow, geology, photos, and plant and animal information.
USGS responds to Deepwater Horizon oil spill [More info]
Imagery, sampling information, and other data intended for use in assessing and remediating environmental problems related to the oil spill in the Gulf of Mexico in 2010
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.
PDF USGS science for the Nation's changing coasts: Shoreline change research [More info]
Explains how and why coasts, beaches, and shorelines change, and how we study these changes.
PDF USGS science for the Nation's changing coasts; Shoreline change assessment [More info]
Shorelines are always changing, yet we use these areas heavily. This shows what we measure and how, to help adapt to changing coastal zones.
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.
USGS tracks acid rain [More info]
Fact sheet on the formation of acid rain, its effects, investigations, and the program of a nationwide network of acid rain monitoring stations called the National Atmospheric Deposition Program/National Trends Network (NADP/NTN).
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.
PDF 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.
PDF Understanding beach health throughout the Great Lakes -- Continuing research [More info]
Outlines tactical problems that make it difficult for beach managers to use scientific information to make beach closure and advisory decisions. Explains methodologies we are using to address those problems and better prepare local decision makers.
PDF 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 our planet through chemistry [More info]
Site with a series of articles showing how chemists and geologists use analytical chemistry to determine the age of the Earth, determine Earth's history, predict volcanic eruptions, observe long-term atmospheric change and study pollution.
PDF Understanding processes affecting mineral deposits in humid environments [More info]
Contaminants from mines move more easily from ore materials and mine waste piles to surrounding estuaries and living organisms when water moves through the mine site. Geochemical results shown here will help people mitigate the negative effects.
PDF Understanding risk and resilience to natural hazards [More info]
General approach taken by USGS to providing communities with the tools and information they need to prepare for natural hazards that may affect them.
PDF Undiscovered Gas Resources in the Alum Shale, Denmark, 2013 [More info]
We estimated a mean undiscovered volume of 6.9 trillion cubic feet of natural gas in this geologic unit using a geology-based assessment methodology.
United States Antarctic Resource Center [More info]
Description of the Antarctic Resources Center and links to its workshops and archives of Antarctic maps, charts, satellite images, and photographs produced by the member nations of the Scientific Committee on Antarctic Research (SCAR).
PDF 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.
PDF 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.
United States National Strong-Motion Project (earthquakes) [More info]
National Strong-Motion Program home page with links to program news, recent events, and datasets of digitized accelerograms downloadable as PC (*.zip) and Unix (*.tar.z) files, data processing, stations, research, publications, and personnel.
Unsaturated-Zone Flow Project [More info]
Overview of research to measure, predict, and understand the flow of water through soil and rock between the land surface and the water table with links to field sites, laboratory methods, theoretical developments, publications, and personnel.
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 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.
PDF Urban development results in stressors that degrade stream ecosystems [More info]
Explains which aspects of stream ecosystems are harmed by urban development and how, along with implications for those who manage urban ecosystems.
PDF 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.
Use of raw materials in the United States from 1900 through 2010 [More info]
Since the beginning of the 20th century, the types and quantities of raw materials used by U.S. manufacturers and consumers have changed over time. This fact sheet quantifies the amounts of those materials used, other than food and fuel.
Using geochemical and statistical tools to identify irrigated areas that might contain high selenium concentrations in surface water [More info]
Program using pattern recognition analysis and classification models to determine areas of irrigated land with concentrations of selenium.
PDF Using models for the optimization of hydrologic monitoring [More info]
Usually we choose to put water monitoring stations in places where we have no data already. But it's more efficient to place stations so that they help to reduce uncertainty in the results of modeling. This analysis shows how to choose.
PDF Using observed warming to identify hazards to Mozambique maize production [More info]
Over 30 years of substantial warming, the timing of life cycle events in maize here has changed, threatening the crop yield by exposing the plant at sensitive phases in its life cycle to increased heat and drought, and lowering the weight of its grains.
PDF Using terrestrial light detection and ranging (lidar) technology for land-surface analysis in the Southwest [More info]
Tripod-mounted lidar makes it inexpensive and efficient to measure and map geographic features that change with time, such as sand dunes and erosional features, and soil microtopography.
Using tiltmeters to measure volcano deformation [More info]
Describes and illustrates how scientists use electronic tiltmeters measuring deformation on volcanoes.
View USGS maps and aerial photo images online [More info]
Links to selected partner sites where USGS maps and aerial photo images may be viewed with a web browser.
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 [More info]
Homepage for USGS Volcano Hazards Program with feature stories, and links to worldwide volcano updates, volcanic hazards, reducing volcanic risk, USGS international programs, and resources such as educator's page, videos, and online reports.
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 and hydrologic hazards, features, and terminology [More info]
Links to explanations of volcanic hazards and features and to a glossary of volcano terminology.
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 video and television surveillance monitoring systems [More info]
Visual monitoring of volcanoes by closed-circuit television and video monitoring for a permanent video record of events using slow-scan television which permits continuous surveillance at a distance for remote volcanoes or in times of danger.
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 [More info]
This booklet presents a generalized summary of the nature, workings, publications, and hazards of the common types of volcanoes around the world, along with a brief introduction to the techniques of volcano monitoring and research.
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 Map Data Collection at the USGS [More info]
Describes past, current, planned, and experimental USGS programs and processes to permit citizen volunteers to collect geographic and cartographic data and information for incorporation into the USGS topographic map revision process.
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.
Volunteer for a changing world [More info]
Volunteer opportunities with U.S. Geological Survey research programs.
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 Information Coordination Program (WICP) [More info]
An interagency program that improves information about natural resources management and environmental protection. The Advisory Committee on Water Information identifies water information needs, evaluates information and recommends improvements.
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.
PDF 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.
PDF 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).
PDF 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%.
PDF 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.
PDF 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 information pages [More info]
Homepage of the Office of Water Quality programs on the quality of the Nation's surface water and ground water resources, with links to general information, quality assurance, software, data, publications, USGS facilities, techniques, and programs.
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.
PDF 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 applications software [More info]
Archive of USGS water resources software and associated data with documentation available to the public without any fee or cost.
Water resources applications software: NCALC, Manning's n value calculation program [More info]
Software for calculating Manning's roughness coefficient values in stream channels with installation instructions for Unix and DOS systems.
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 maps and geographic information systems (GIS) information [More info]
Portal for links to United State water resources maps and geographic information systems (GIS) data for the United States for viewing or downloading.
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 Alaska [More info]
USGS water resources home page for Alaska with links to detailed hydrologic studies and real-time and historic data on streamflow, ground and surface water, glaciers, and water quality plus research activities, publications, and contacts.
PDF 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 Arizona [More info]
USGS water resources home page for Arizona with detailed hydrologic studies and real-time and long-term data on streamflow, ground and surface water, water quality, and well levels plus current conditions, publications, and projects.
Water resources of Arkansas [More info]
USGS water resources home page for Arkansas with links to detailed hydrologic studies and real-time and long-term data on streamflow, ground and surface water, water quality, water use, and rain with links to publications and research partners
PDF 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 California [More info]
USGS water resources home page for California with links to detailed hydrologic studies and real-time data on streamflow, ground and surface water, and water quality, plus links to online reports, current issues, data archives and image archive.
Water resources of Colorado [More info]
USGS water resources home page for Colorado with links to detailed hydrologic studies and real-time and long-term data on streamflow, snowpack, sediment, ground and surface water, and water quality, plus publications, news, and drought watch.
Water resources of Connecticut [More info]
USGS water resources home page for Connecticut with links to detailed hydrologic studies and real-time and long-term data on streamflow, ground and surface water, water quality, streamflow conditions, gage stations, and drought.
Water resources of Florida [More info]
USGS water resources home page for Florida with links to detailed hydrologic studies with real-time and long-term data on streamflow, ground and surface water, and water quality, plus publications and products, projects, news, and water watch.
Water resources of Georgia [More info]
USGS water resources home page for Georgia with links to detailed hydrologic studies and real-time and long-term data for streamflow, ground and surface water, water quality, and floods, plus drought watch, current projects, and connections.
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 Iowa [More info]
USGS water resources home page for Iowa with links to hydrologic studies and real-time and historical data on floods, streamflow, ground and surface water, sediment, precipitation, and water quality plus news releases, publications and contacts.
Water resources of Kansas [More info]
USGS water resources home page for Kansas with links to detailed hydrologic studies and real-time and historical data on streamflow, ground and surface water, and water quality plus flood watch, drought watch, publications, and district news.
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.
PDF 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 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.
PDF 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 programs [More info]
Brief descriptions and links to major USGS programs at the state, regional, national, and international level for providing hydrologic information and for appraising the quantity, quality and location of the Nation's water resources.
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 [More info]
Homepage of an educational site for elementary school students with links to water subjects including water basics, water questions and answers, water use, picture gallery, glossary, NavGuide, and certificate of completion.
Water science for schools: Earth's water [More info]
Educational site for elementary school students that tells the story of where, how much, and in what forms water exists on Earth.
Water science for schools: Earth's water - runoff [More info]
Site for elementary school students on runoff with links to information on rivers and watersheds, plus random link and glossary.
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: common water measurements [More info]
Explanation of common water properties including temperature, pH, specific conductance, turbidity, dissolved oxygen, hardness and suspended sediment for students and general public.
Water science for schools: follow a drip through the water cycle [More info]
Site for elementary school students on the water cycle with a link to a version geared for second grade students and a random link.
Water science for schools: glaciers and icecaps, storehouses of fresh water [More info]
Brief information for students on glaciers and icecaps from Water Science for Schools with link to more glacial information by the National Snow and Ice Data Center (NSIDC).
Water science for schools: land subsidence [More info]
Site for elementary school studies on land subsidence with links to land subsidence in California, wells, ground water quality, sinkholes, glossary, and a random link.
Water science for schools: the Earth's water - ground water [More info]
Educational site for elementary schools students on ground water sources, ground water flow, and aquifers.
Water science for schools: the activity center - challenge questions [More info]
Educational site for elementary school students with questions to challenge students plus links to opinion surveys, questionnaires, and water facts.
Water science for schools: the water science picture gallery [More info]
Photos with descriptions of water subjects and of scientists engaged in water research.
Water science for schools: water properties [More info]
Educational site for elementary school students on the properties of water with links to a true/false quiz, common water measurements, pH, and water facts.
Water science for schools: water quality [More info]
Educational site for elementary school students on water quality with links to related topics including pesticides in ground water, kid's view, urbanization and water and others.
Water science for schools: water questions and answers [More info]
Educational site on water for elementary school students with questions and answers that are meant to be useful and entertaining.
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 science for schools: where is Earth's water located? [More info]
Educational site for elementary school students on the distribution of water, water supply and water use.
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 the Nation [More info]
Homepage for USGS water quality information. The NWISWeb discrete sample database is a compilation of over 3.5 million historical water quality analyses in the USGS district databases. Also includes access to real-time data and a tutorial.
Water-quality information - data [More info]
Links to major databases on USGS real-time and historic time period data for water quality, atmospheric deposition, streamflow, and suspended sediments and links to related databases of other agencies.
Water-related scientific programs in Hawaii and Pacific islands [More info]
Overview of water-related scientific programs in Hawaii and Pacific islands (Northern Marianas, Guam, Palau, and American Samoa). Links to programs on hydrologic data collection, ground water availability, and surface runoff.
PDF Water-resources activities of the U.S. Geological Survey in Ohio [More info]
Report on recent USGS programs in Ohio related to water resources studies, with program highlights, flood and drought studies, ground water studies, microbiological water quality research, stream data, and recent publications.
PDF WaterSMART-The Colorado River Basin focus-area study [More info]
Explains the strategy that USGS will use to estimate the distribution and abundance of freshwater resources, evaluate factors affecting availability, estimate undeveloped potential resources, and forecasting likely changes due to other factors.
Watershed and River Systems Management Program-WARSMP: application to the Yakima River Basin, Washington [More info]
Description of Yakima River Basin Program including: location of basin, description of economic activities, water management issues and modeling processes used to account for water availability.
Watershed modeling [More info]
Description of the development and use of models to study watersheds supporting a broad range of applications and user skills. Includes links to related memos, training, software, projects, and references
PDF Watershed modeling applications in south Texas [More info]
Explains how mathematical simulations of watershed properties can help us understand the likely behavior of the water systems, putting the choices available to people in better perspective.
Watershed processes and modeling [More info]
Links to published materials produced by the Watershed Processes and Modeling Project on watershed model TOPMODEL, compilation of STATSGO soils data, climate change, landscape heterogeneity in ecoregions, and other links.
PDF Watershed scale response to climate change--Black Earth Creek Basin, Wisconsin [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Cathance Stream Basin, Maine [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Clear Creek Basin, Iowa [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--East River Basin, Colorado [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Feather River Basin, California [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Flint River Basin, Georgia [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Naches River Basin, Washington [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Pomperaug River Watershed, Connecticut [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Sagehen Creek Basin, California [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Sprague River Basin, Oregon [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Starkweather Coulee Basin, North Dakota [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Trout Lake Basin, Wisconsin [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Watershed scale response to climate change--Yampa River Basin, Colorado [More info]
Mathematical models predict overall streamflow, runoff, subsurface flow, groundwater flow, and soil moisture in this area in response to four different greenhouse gas emission scenarios.
PDF Web-Based Geospatial Tools to Address Hazard Mitigation, Natural Resource Management, and Other Societal Issues [More info]
Discusses web resources recently developed to support ecosystem portfolio and land use modeling
West-central Florida erosion study [More info]
West central Florida erosion interactive map with GIS datasets to download including geologic interpretative layers, samples, bathymetry, and imagery.
Western Geographic Science Center [More info]
USGS geographic information studies and data for the western United States.
Western Mineral Resources [More info]
Western Mineral Resources home page with links to projects to assess the mineral resources and mineral related environmental problems of the western region of the United States. Also links to products, offices, facts, FAQs and newsletter.
Western Region Coastal and Marine Geology [More info]
Western Region Coastal and Marine Geology science center conducts research in the coastal and offshore areas of California, Oregon, Washington, Alaska, Hawaii, and other U.S. Pacific Islands.
Western Region Geology and Geophysics Center [More info]
Overview of the research of this organizational unit with links to projects and activities and to geologic information on the western U.S.
Western Region Mineral Resources Project listing [More info]
Links to ongoing mineral resources projects in the Western Region of the United States plus links to offices and staff of the Western Mineral Resources Team.
Western Region geologic information [More info]
Links to geologic information on western states: Alaska, Arizona, California, Hawaii, Idaho, Nevada and Oregon including information on coastal and marine geology, mineral resources, earthquakes, landslides, earthquake hazards and geologic maps.
Western Region geophysical investigations by the Geophysical Unit of Menlo Park, Calif. (GUMP) [More info]
Overview of the research group Geophysical Unit of Menlo Park (GUMP) with links to studies, models, and maps on gravity and geomagnetism in Nevada, California, Oregon, Washington and the U.S.
Western lake catchment systems - Bear Lake region, Idaho-Utah [More info]
Homepage for project on Bear Lake, Idaho-Utah, to study past climate change and effect on lake catchment basins. Includes link to summary, personnel, geology, methods used including coring and seismic surveying, and publications.
What Mobilizes Arsenic in Ground Water? [More info]
Research findings and examples of application to real problems--chemical reactions between nitrate, iron, and oxygen can affect the mobility of trace amounts of arsenic.
What is an Ocean Bottom Seismometer? [More info]
Description and uses of the Ocean Bottom Seismometer; a self contained data-acquisition system which free falls to the ocean floor and records seismic data generated by airguns and earthquakes.
What on Earth is plate tectonics? [More info]
Discussion and diagrams on plate tectonics and the structure of the Earth for beginners with link to a detailed version: This Dynamic Earth for more information.
Why Study Paleoclimate? [More info]
It's the only way to understand global environmental conditions that were very different from the way they are today.
PDF Wildfire effects on source-water quality--Lessons from Fourmile Canyon fire, Colorado, and implications for drinking-water treatment [More info]
Stream discharge and nitrate concentration increased downstream of the burned area during snowmelt, but these were probably within the treatment capacity of most drinking-water plants, and limited changes were observed in downstream ecosystems.
Woods Hole Coastal and Marine Geology Field Center [More info]
Site with links to projects of the field center of the Woods Hole Coastal Marine Geology Program on underwater areas between shorelines and the deep ocean, off the U.S. East Coast, the Gulf of Mexico, and in parts of the Caribbean and Great Lakes.
World Coal Quality Inventory (WoCQI) [More info]
Homepage of the World Coal Quality Inventory (WoCQI) with sample collection procedures.
World Petroleum Assessment 2000: description and results [More info]
World Petroleum Assessment 2000 estimates of the quantities of conventional oil, gas, and natural gas liquids outside the United States that have the potential to be added to reserves in the next 30 years (1995 to 2025).
World petroleum assessment [More info]
A rigorous geologic foundation for estimating world undiscovered energy resources. Links to world energy resources text and maps (PDF format), total petroleum system (TPS), and world geologic maps.
Wyoming drought watch [More info]
Gives map of streamflow conditions in Wyoming with access to streamflow data, real-time, daily and historic, plus information on drought analysis and management.
PDF Wyoming groundwater-quality monitoring network [More info]
Shows high-priority areas where groundwater will be monitored, outlines the methods of collection and analysis that will be used.
Yakima River Basin [More info]
Description of the studies of the ground water system in the Yakima River Basin and how it interacts with rivers and streams in the basin. Includes links to project status, datasets, maps, project summaries, news releases and bibliographies.
Yellowstone Volcano Observatory (YVO) [More info]
Homepage of the Yellowstone Volcano Observatory with links to information about the observatory at Yellowstone National Park, volcanic history, photo gallery, monitoring data, publications and products, and Frequently Asked Questions (FAQs).
Yosemite Valley geologic story [More info]
Site describes the present understanding of the various geologic processes that contributed to the valley's creation. Links to Yosemite Valley's geologic maps.
PDF Zinc-The key to preventing corrosion [More info]
Explains how we use zinc, where it comes from, and discusses worldwide supply and demand.
usSEABED (marine sediment and rock distribution) [More info]
Data on sediment and rock distributions in the waters off the United States, shown using an internet map service with links to downloadable data files
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