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The USGS collects, analyzes, and distributes data on a wide variety of water-related issues and resources. Much of our data is publicly available through the National Water Information System (NWIS), but additional datasets and analytical tools are also available.

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Filter Total Items: 372
Date published: July 23, 2014

Geophysical Characteristics of the Conterminous United States: Lithology - Physical Source Data

This workbook summarizes geophysical data for each lithology contained within the USGS Preliminary Integrated Geologic Map Databases for the United States (Open File Reports 2004-1355, 2005-1305, 2005-1323, 2005-1324, 2005-1325, 2005-1351, and 2006-1272). The geophysical attributes in the “Lith Summary” spreadsheet (tab) are measures of central tendency for all publically...

Attribution: Water Resources
Date published: July 23, 2014

Geophysical Characteristics of the Conterminous United States: Uniaxial Compressive Strength (MPa)

This raster depicts the percentage of lithological the compressive strength, measured as uniaxial compressive strength (in megaPascals, MPa) of surface or near surface geology. We derived these rasters by calculating the average strength for each map unit in combined surficial-bedrock geologic maps. We used state geologic maps (Preliminary Integrated Geologic Map Databases for the United...

Attribution: Water Resources
Date published: July 23, 2014

Geochemical Characteristics of the Conterminous United States: % P2O5

This raster depicts the percentage of lithological phosphorus pentoxide (P2O5) content in surface or near surface geology. We derived these rasters by calculating the average percent P2O5 content for each map unit in combined surficial-bedrock geologic maps. We used state geologic maps (Preliminary Integrated Geologic Map Databases for the United States, Open File Reports 2004-1355, 2005-1305...

Attribution: Water Resources
Date published: July 23, 2014

Geochemical Characteristics of the Conterminous United States: % SiO2

This raster depicts the percentage of lithological silicon dioxide (SiO2) content in surface or near surface geology. We derived these rasters by calculating the average percent SiO2 content for each map unit in combined surficial-bedrock geologic maps. We used state geologic maps (Preliminary Integrated Geologic Map Databases for the United States, Open File Reports 2004-1355, 2005-1305, 2005...

Attribution: Water Resources
Date published: July 23, 2014

Geophysical Characteristics of the Conterminous United States: Lithology - Major Oxides Data

This workbook summarizes geochemical data for each lithology contained within the USGS Preliminary Integrated Geologic Map Databases for the United States (Open File Reports 2004-1355, 2005-1305, 2005-1323, 2005-1324, 2005-1325, 2005-1351, and 2006-1272). The geochemical attributes in the “Lith Summary” spreadsheet (tab) are measures of central tendency for all whole rock...

Attribution: Water Resources
Date published: July 23, 2014

Geochemical Characteristics of the Conterminous United States: % Nitrogen

This raster depicts the percentage of lithological nitrogen (N) content in surface or near surface geology. We derived these rasters by calculating the average percent N content for each map unit in combined surficial-bedrock geologic maps. We used state geologic maps (Preliminary Integrated Geologic Map Databases for the United States, Open File Reports 2004-1355, 2005-1305, 2005-1323, 2005-...

Attribution: Water Resources
Date published: July 23, 2014

Geochemical Characteristics of the Conterminous United States: % CaO

This raster depicts the percentage of lithological calcium oxide (CaO) content in surface or near surface geology. We derived these rasters by calculating the average percent CaO content for each map unit in combined surficial-bedrock geologic maps. We used state geologic maps (Preliminary Integrated Geologic Map Databases for the United States, Open File Reports 2004-1355, 2005-1305, 2005-...

Attribution: Water Resources
Date published: July 23, 2014

Geochemical Characteristics of the Conterminous United States: % MgO

This raster depicts the percentage of lithological magnesium oxide (MgO) content in surface or near surface geology. We derived these rasters by calculating the average percent MgO content for each map unit in combined surficial-bedrock geologic maps. We used state geologic maps (Preliminary Integrated Geologic Map Databases for the United States, Open File Reports 2004-1355, 2005-1305, 2005-...

Attribution: Water Resources
Date published: April 28, 2014

GIS Features of the Geospatial Fabric for National Hydrologic Modeling

The Geopspatial Fabric provides a consistent, documented, and topologically connected set of spatial features that create an abstracted stream/basin network of features useful for hydrologic modeling.The GIS vector features contained in this Geospatial Fabric (GF) data set cover the lower 48 U.S. states, Hawaii, and Puerto Rico. Four GIS feature classes are provided for each Region: 1) the...

Date published: September 22, 2012

Alkalinity Calculator

The Alkalinity Calculator will analyze the titration curve and calculate the alkalinity or acid neutralizing capacity (ANC) of the sample using one or more of several different methods. Alkalinity is for filtered samples, while ANC is for unfiltered samples. The results will be displayed in tabular and graphical form.

Date published: November 2, 2007

Digital Elevation Model of Scoggins Creek Drainage & Henry Hagg Lake

Digital dataset of surface topology for the Scoggins Creek watershed.

Date published: September 26, 2001

Geological Survey of Alabama - Downloadable GIS datasets

Spatial/GIS data sets for Alabama are available numerous spatial data clearinghouses. Spatial/GIS data sets for USGS studies that include Alabama or include parts of Alabama are also available from USGS.

Downloadable GIS Datasets, OGB GIS Datasets, Digital Raster Graphics (DRG), 1:24000 DRG, 1:100000 DRG, 1:250000 DRG, Hazards GIS Data, Hazards Data Water GIS Data, HUC 11 Watersheds

Filter Total Items: 15,345
Year Published: 2018

Volcanic aquifers of Hawai‘i—Hydrogeology, water budgets, and conceptual models

Hawai‘i’s aquifers have limited capacity to store fresh groundwater because each island is small and surrounded by saltwater. Saltwater also underlies much of the fresh groundwater. Fresh groundwater resources are, therefore, particularly vulnerable to human activity, short-term climate cycles, and long-term climate change. Availability of fresh...

Izuka, Scot K.; Engott, John A.; Rotzoll, Kolja; Bassiouni, Maoya; Johnson, Adam G.; Miller, Lisa D.; Mair, Alan
Izuka, S.K., Engott, J.A., Rotzoll, Kolja, Bassiouni, Maoya, Johnson, A.G., Miller, L.D., and Mair, Alan, 2018, Volcanic aquifers of Hawai‘i—Hydrogeology, water budgets, and conceptual models (ver. 2.0, March 2018): U.S. Geological Survey Scientific Investigations Report 2015-5164, 158 p., https://doi.org/10.3133/sir20155164.

Year Published: 2018

THRESH—Software for tracking rainfall thresholds for landslide and debris-flow occurrence, user manual

Precipitation thresholds are used in many areas to provide early warning of precipitation-induced landslides and debris flows, and the software distribution THRESH is designed for automated tracking of precipitation, including precipitation forecasts, relative to thresholds for landslide occurrence. This software is also useful for analyzing...

Baum, Rex L.; Fischer, Sarah J.; Vigil, Jacob C.
Baum, R.L., Fischer, S.J., and Vigil, J.C., 2018, THRESH—Software for tracking rainfall thresholds for landslide and debris-flow occurrence, user manual: U.S. Geological Survey Techniques and Methods, book 14, chap. A2, 33 p., https://doi.org/10.3133/tm14A2.

Year Published: 2018

Suspended-sediment transport from the Green-Duwamish River to the Lower Duwamish Waterway, Seattle, Washington, 2013–17

The Green-Duwamish River transports watershed-derived sediment to the Lower Duwamish Waterway Superfund site near Seattle, Washington. Understanding the amount of sediment transported by the river is essential to the bed sediment cleanup process. Turbidity, discharge, suspended-sediment concentration (SSC), and particle-size data were collected by...

Senter, Craig A.; Conn, Kathleen E.; Black, Robert W.; Peterson, Norman; Vanderpool-Kimura, Ann M.; Foreman, James R.
Senter, C.A., Conn, K.E., Black, R.W., Peterson, N., Vanderpool-Kimura, A., and Foreman, J.R., 2018, Suspended-sediment transport from the Green-Duwamish River to the Lower Duwamish Waterway, Seattle, Washington, 2013–17: U.S. Geological Survey Open-File Report 2018–1029, 23 p., https://doi.org/10.3133/ofr20181029.

Year Published: 2018

U.S. Geological Survey - Virginia Department of Transportation: Bridge scour pilot study

BackgroundCost effective and safe highway bridge designs are required to ensure the long-term sustainability of Virginia’s road systems. The streamflows that, over time, scour streambed sediments from bridge piers inherently affect bridge safety and design costs. To ensure safety, bridge design must anticipate streambed scour at bridge piers over...

Austin, Samuel H.
Austin, S.H., 2018, U.S. Geological Survey - Virginia Department of Transportation: Bridge scour pilot study: U.S. Geological Survey Fact Sheet 2018–3006, 2 p., https://doi.org/10.3133/fs20183006.

Year Published: 2018

Determination of δ13C, δ15N, or δ34S by isotope-ratio-monitoring mass spectrometry using an elemental analyzer

This report describes procedures used in the Geology, Geophysics, and Geochemistry Science Center of the U.S. Geological Survey in Denver, Colorado, to determine the stable-isotope ratios 13C/12C, 15N/14N, and 34S/32S in solid materials. The procedures use elemental analyzers connected directly to gas-source isotope-ratio mass spectrometers. A...

Johnson, Craig A.; Stricker, Craig A.; Gulbransen, Cayce A.; Emmons, Matthew P.
Johnson, C.A., Stricker, C.A., Gulbransen, C.A., and Emmons, M.P., 2018, Determination of δ13C, δ15N, or δ34S by isotope-ratio-monitoring mass spectrometry using an elemental analyzer: U.S. Geological Survey Techniques and Methods, book 5, chap. D4, 19 p., https://doi.org/10.3133/tm5D4.

Year Published: 2018

Spatially distributed groundwater recharge estimated using a water-budget model for the Island of Maui, Hawai`i, 1978–2007

Demand for freshwater on the Island of Maui is expected to grow. To evaluate the availability of fresh groundwater, estimates of groundwater recharge are needed. A water-budget model with a daily computation interval was developed and used to estimate the spatial distribution of recharge on Maui for average climate conditions (1978–2007 rainfall...

Johnson, Adam G.; Engott, John A.; Bassiouni, Maoya; Rotzoll, Kolja
Johnson, A.G., Engott, J.A., Bassiouni, Maoya, and Rotzoll, Kolja, 2018, Spatially distributed groundwater recharge estimated using a water-budget model for the Island of Maui, Hawai`i, 1978–2007 (ver. 2.0, February 2018): U.S. Geological Survey Scientific Investigations Report 2014–5168, 53 p., https://doi.org/10.3133/sir20145168.

Year Published: 2018

Groundwater quality in the North San Francisco Bay shallow aquifer, California

Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and increases public access...

Bennett, George L.; Fram, Miranda S.
Bennett, G.L., V, and Fram, M.S., 2018, Groundwater quality in the North San Francisco Bay shallow aquifer, California: U.S. Geological Survey Fact Sheet 2018–3007, 4 p., https://doi.org/10.3133/fs20183007.

Year Published: 2018

Status and understanding of groundwater quality in the North San Francisco Bay Shallow Aquifer study unit, 2012; California GAMA Priority Basin Project (ver. 1.1, February 2018)

Groundwater quality in the North San Francisco Bay Shallow Aquifer study unit (NSF-SA) was investigated as part of the Priority Basin Project of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program. The study unit is in Marin, Mendocino, Napa, Solano, and Sonoma Counties and included two physiographic study areas: the...

Bennett, George L.
Bennett, G.L., V, 2018, Status and understanding of groundwater quality in the North San Francisco Bay Shallow Aquifer study unit, 2012; California GAMA Priority Basin Project (ver. 1.1, February 2018): U.S. Geological Survey Scientific Investigations Report 2017–5051, 74 p., https://doi.org/10.3133/sir20175051.

Year Published: 2018

Variability of hydrological droughts in the conterminous United States, 1951 through 2014

Spatial and temporal variability in the frequency, duration, and severity of hydrological droughts across the conterminous United States (CONUS) was examined using monthly mean streamflow measured at 872 sites from 1951 through 2014. Hydrological drought is identified as starting when streamflow falls below the 20th percentile streamflow value for...

Austin, Samuel H.; Wolock, David M.; Nelms, David L.
Austin, S.H., Wolock, D.M., and Nelms, D.L., 2018, Variability of hydrological droughts in the conterminous United States, 1951 through 2014: U.S. Geological Survey Scientific Investigations Report 2017–5099, 16 p., https://doi.org/10.3133/sir20175099.

Year Published: 2018

Seeking excellence: An evaluation of 235 international laboratories conducting water isotope analyses by isotope-ratio and laser-absorption spectrometry

RationaleWater stable isotope ratios (δ2H and δ18O values) are widely used tracers in environmental studies; hence, accurate and precise assays are required for providing sound scientific information. We tested the analytical performance of 235 international laboratories conducting water isotope analyses using dual-inlet and continuous-flow...

Wassenaar, L. I.; Terzer-Wassmuth, S.; Douence, C.; Araguas-Araguas, L.; Aggarwal, P. K.; Coplen, Tyler B.
Attribution: Water Resources,
Wassenaar, L.I., Terzer‐Wassmuth, S., Douence, C., Araguas‐Araguas, L., Aggarwal, P.K., and Coplen, T.B., 2018, Seeking excellence: An evaluation of 235 international laboratories conducting water isotope analyses by isotope-ratio and laser‐absorption spectrometry: Rapid Communications in Mass Spectrometry, v. 32, p. 393‐406.

Year Published: 2018

Groundwater conditions in Georgia, 2015–16

The U.S. Geological Survey collects groundwater data and conducts studies to monitor hydrologic conditions, define groundwater resources, and address problems related to water supply, water use, and water quality. In Georgia, water levels were monitored continuously at 157 wells during calendar years 2015 and 2016. Because of missing data or short...

Gordon, Debbie W.; Painter, Jaime A.
Gordon, D.W., and Painter, J.A., 2018, Groundwater conditions in Georgia, 2015–16: U.S. Geological Survey Scientific Investigations Report 2017–5142, 59 p., https://doi.org/10.3133/sir20175142.

Year Published: 2018

Contaminants of emerging concern presence and adverse effects in fish: A case study in the Laurentian Great Lakes

The Laurentian Great Lakes are a valuable natural resource that is affected by contaminants of emerging concern (CECs), including sex steroid hormones, personal care products, pharmaceuticals, industrial chemicals, and new generation pesticides. However, little is known about the fate and biological effects of CECs in tributaries to the Great...

Jorgenson, Zachary G.; Thomas, Linnea M.; Elliott, Sarah M.; Cavallin, Jenna E.; Randolph, Eric C.; Choy, Steven J.; Alvarez, David; Banda, Jo A.; Gefell, Daniel J.; Lee, Kathy E.; Furlong, Edward T.; Schoenfuss, Heiko L.
Jorgenson, Z.G., Thomas, L.M., Elliott, S.M., Cavallin, J.E., Randolph, E.C., Choy, S.J., Alvarez, D.A., Banda, J.A., Gefell, D.J., Lee, K.E., Furlong E.T., Shocenfuss, H.L., 2018, Contaminants of emerging concern presence and adverse effects in fish: A case study in the Laurentian Great Lakes, Environmental Pollution 236, p. 718-733. doi: 10.1016/j.envpol.2018.01.070

The USGS produces many types of multimedia products. Use the links below to browse our offerings of photograph galleries, podcasts and sound files, videos, aerial photos, and posters related to water. The USGS Newsroom has a Web page that highlights the main collection of multimedia products.

Filter Total Items: 1,355
September 30, 2016

Ending Edge Data Collection in TRDI SxS Pro

In this video, we will demonstrate how to collect an ending edge as part of a midsection ADCP measurement in TRDI SxS Pro. Note: Use of trade names is for descriptive purposes only, and does not imply endorsement by the USGS. For additional videos in this series, visit the following link: 

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September 30, 2016

Editing Vertical Information in TRDI SxS Pro

In this video, we will discuss how to edit vertical information during playback of a measurement in TRDI SxS Pro. Note: Use of trade names is for descriptive purposes only, and does not imply endorsement by the USGS. For additional videos in this series, visit the following link: 

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September 30, 2016

Processing Parameters in TRDI SxS Pro

In this video, we will discuss the Processing dialog in TRDI SxS Pro. Note: Use of trade names is for descriptive purposes only, and does not imply endorsement by the USGS. For additional videos in this series, visit the following link: https://www2.usgs.gov/humancapital/ecd/

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woman standing in stream making discharge measurement
September 23, 2016

Making a discharge measurement with a flowtracker

USGS hydrologist Amy Simonson making a discharge measurement with a flowtracker in a Long Island stream.

Scientists operate equipment in snow-covered area.
September 6, 2016

GPR and Broadband Electromagnetic Induction

USGS scientists conduct field work in the foothills of the Brooks Range in Alaska. Hydrologist Eric White (left) is collecting ground-penetrating radar (GPR). Research Hydrologist Martin Briggs (right) is collecting broadband electromagnetic induction data. The flowing water visible in the background is groundwater discharging at a spring. (October 2016)

Attribution: Water Resources
A U.S. Geological Survey hydrologic technician, uses an Acoustic Doppler Velocimeter to measure stream flow on a Florida creek.
September 2, 2016

Measuring streamflow

Neil Yobbi, U.S. Geological Survey hydrologic technician, uses an Acoustic Doppler Velocimeter to measure stream flow on Curlew Creek in Tampa, Florida. While Hurricane Hermine might have made landfall almost 200 miles away in St. Marks, Florida, a USGS rain gauge in Pinellas County, Florida, still measured more than 16 inches of total rain during the past three-day storm

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photo of a rain gage on Long Island
September 1, 2016

Rain Gage

Rain gage on Long Island

August 27, 2016

Live Chat with James Fountain on Louisiana Floods

This was a Facebook Live video conducted with James Fountain of the USGS discussing the Louisiana flooding in August 2016 and the personal experience James had with this event. Questions and comments during the live video at: https://www.facebook.com/USGeologicalSurvey/videos/1144228595623122/

U.S. Geological Survey streamflow-gaging station 08111000 Navasota River near Bryan, Texas, upstream from U.S. Hwy. 190.
August 27, 2016

USGS station 08111000 Navasota River near Bryan, Texas, SIR 2009–5174

U.S. Geological Survey streamflow-gaging station 08111000 Navasota River near Bryan, Texas, looking upstream from U.S. Highway 190 bridge, August 27, 1975.

Two men mark a high-water mark on a structure
August 26, 2016

USGS Scientists Mark a High-Water Mark in Louisiana

Daniel McCay and Chris Henry, USGS hydrologic technicians, use a level to draw a line on a high-water mark August 26. In most circumstances, when a high-water mark is flagged it would then be surveyed with GPS equipment to obtain its exact coordinates and elevation. However, because of the possibility of more storms hitting Louisiana the teams were initially only

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Two men walk by debris along the side of the road
August 26, 2016

Looking for High-Water Marks

Daniel McCay and Chris Henry, U.S. Geological Survey hydrologic technicians, search a neighborhood south of Denham Springs, Louisiana, for high-water marks August 26. The term high-water mark refers to the debris flood waters will leave on walls, buildings and trees. This thin line of residue is an indicator of how high the waters reached, yet the fragile nature of

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A man in an orange shirt writes on a pad of paper
August 26, 2016

Recording a High-Water Mark

Jonathan Gillip, USGS hydrologist, documents a high-water mark he flagged near a damage retirement community in Denham Springs, Louisiana, August 26. So far, USGS teams have flagged and surveyed more than 400 high-watermarks across southern Louisiana.

Filter Total Items: 387
Date published: May 22, 2014

Study Aids Water Managers Battle Saltwater Intrusion

Scientists are using a cadre of new weapons in the battle against an old nemesis – saltwater intrusion.

Attribution: Water Resources
Date published: March 17, 2014

Media Advisory: Speed Date with a Drought Scientist

How does drought affect California's water supply? Does it impact the surface water only, or what about groundwater? How does it impact water quality? What about streamflow? How is the water shortage affecting ecosystems? How is the drought related to climate change?

Attribution: Water Resources
Date published: March 17, 2014

Nutrients in Upper Mississippi May be Damaging La Crosse-Area Waters

High concentrations of nutrients from the Upper Mississippi River may be causing harmful algae and duckweed growth in some La Crosse-area lakes and backwaters.

Date published: March 12, 2014

Land Use Impacts Aquatic Life in Illinois River Basin

The biology of small streams in the Illinois River Basin has been disturbed by a mix of factors, according to a new U.S. Geological Survey report.

Attribution: Water Resources
Date published: March 10, 2014

New Maps of Afghanistan Provide "Fingerprint" of Natural Resources

A coalition of scientists from the United States and Afghanistan today released 60 high-tech maps that will help Afghanistan chart a course for future economic development.  These maps represent a milestone as Afghanistan is the first country to be almost completely mapped using hyperspectral imaging data.

Date published: February 27, 2014

Pollutants Pose Threat to Mekong River Residents

Portions of the Mekong River Basin contain hotspots of persistent organic pollutants that pose a significant threat to the residents and wildlife of the Mekong Basin, according to a new U.S. Geological Survey study.

Attribution: Water Resources
Date published: February 13, 2014

Drought Affects Streamflow Across California

With California experiencing its worst drought in over a century, 2013 is in the record books as the driest calendar year in the state’s 119-year recorded history.

Date published: January 13, 2014

New Tools to Address Boise River’s Phosphorus Problem

Resource managers in southwestern Idaho have a new set of tools for reducing phosphorus concentrations in the lower Boise River

Date published: January 9, 2014

The Connected Consequences of River Dams

In a case study of dams on the upper Missouri River, USGS researchers have demonstrated that an upstream dam is still a major control of river dynamics where the backwater effects of a downstream reservoir begin. 

Attribution: Water Resources
Date published: March 11, 2011

Montgomery unveils High Water Mark Sign signifying Alabama River's highest level

High Water Mark Sign marking Alabama River's highest recorded level unveiled in Montgomery

Date published: October 29, 2010

Great Lakes Sea Lamprey Control To be Featured on Discovery Channel’s

ANN ARBOR, MI—Sea lamprey control is a “dirty job,” one that TV star Mike Rowe will take on during an upcoming episode of the Discovery Channel’s popular program Dirty Jobs.  The segment will first air on November 2, 2010 at 9:00 EST/8:00 CST.

Date published: October 22, 2010

New Interactive Flood Warning Tool for the Flint River - First of its Kind Announced in Georgia

A new online and interactive flood preparedness tool is now available for the Flint River. Scientists from the U.S Geological Survey (USGS) and the National Weather Service (NWS) developed the new Flood Inundation Map to improve flood warnings and emergency management along the Flint River in Albany, Ga.

Attribution: Water Resources
Filter Total Items: 1,829