Water Resources

Filter Total Items: 345
Date published: February 24, 2019
Status: Active

National Water-Quality Project Sampling Methods

USGS National Water Quality Assessment (NAWQA) studies require analyses of stream and bed-sediment samples for major ions, nutrients, sediments, and organic contaminants that are consistent across time and space. Procedures have been designed specifically to produce...

Contacts: Barbara Mahler
Attribution: Water Resources
Date published: February 24, 2019
Status: Active

SPARROW: Attributes for NHDPlus Catchments (Version 1.1) for the Conterminous United States

The national databases used in USGS SPARROW models are available for download. Attributes from the NHDPlus data set, such as climate, geology, soils, land cover, hydrologic variables, physical characteristics, chemicals, and nutrients, are available for all catchments in the  digital stream networks (1:500K scale).

Attribution: Water Resources
Date published: February 24, 2019
Status: Active

SPARROW: Attributes for MRB_E2RF1 Catchments by Major River Basins in the Conterminous United States

The national databases used in USGS SPARROW models are available for download. Attributes from the RF1 data set, such as climate, geology, soils, land cover, hydrologic variables, physical characteristics, chemicals, and nutrients, are available for all catchments in the digital stream networks (1:100K scale).

Attribution: Water Resources
Date published: February 24, 2019
Status: Archived

Regional SPARROW Model Assessments of Streams and Rivers

SPARROW (Spatially Referenced Regressions On Watershed attributes) models have been developed for seven large regions of the conterminous United States. Results from the models can be used to compare nutrient sources and watersheds that contribute elevated nutrient loads to downstream receiving waters.

Attribution: Water Resources
Date published: February 24, 2019
Status: Archived

Changes in Nutrient and Sediment Concentrations in Streams and Rivers of the United States, 1993-2003

This archived site contains information about the USGS study of trends and changes in total phosphorus concentrations, total nitrogen concentrations, streamflow, phosphorus and nitrogen loading from manure and fertilizer, and nitrogen loading from atmospheric deposition in streams and rivers across the nation from 1993 to 2003.

Attribution: Water Resources
Date published: February 24, 2019
Status: Active

USGS Groundwater News

The latest groundwater science and news from the U.S. Geological Survey, issued monthly since May 2017.

Attribution: Water Resources
Date published: February 24, 2019
Status: Active

Handheld Thermal Imaging Cameras for Groundwater/Surface-Water Interaction Studies

USGS scientists are using high-resolution handheld thermal imaging cameras in groundwater/surface-water interaction studies and other investigations. These cameras are used to quickly locate and characterize thermal anomalies in streams, lakes, and adjacent structures. Variations in temperature can be used to track the heat carried by flowing water, such groundwater discharge into a stream....

Contacts: Martin A Briggs
Attribution: Water Resources
Date published: February 24, 2019
Status: Active

What does groundwater have to do with ice in Alaska?

USGS scientists are working alongside university researchers in Alaska to understand how groundwater and permafrost conditions change over time due to seasonal variations and climate change. Changes in permafrost can pose a threat to built infrastructure (like roads, homes, and pipelines) and to valued ecological resources that provide important habitats for wildlife.

Contacts: Martin A Briggs
Attribution: Water Resources
Date published: February 24, 2019
Status: Active

Fiber-Optic Distributed Temperature Sensing Technology Demonstration and Evaluation Project

Fiber-optic distributed temperature sensing (FO-DTS) is an emerging technology that has promise for characterizing estuary-aquifer and stream-aquifer interaction and for identifying transmissive fractures in bedrock boreholes.

Attribution: Water Resources
Date published: February 24, 2019
Status: Active

Borehole Nuclear Magnetic Resonance (NMR)

Borehole nuclear magnetic resonance (NMR) is an emerging geophysical method being applied to hydrogeology investigations.

Contacts: Carole Johnson
Attribution: Water Resources
Date published: February 24, 2019
Status: Active

Spectral Gamma Borehole Logging

Spectral gamma borehole geophysical methods measure natural-gamma energy spectra, which are caused by the decay of uranium, thorium, potassium-40, and anthropogenic radioactive isotopes. Spectral gamma data can be used to identify and quantify the amount of uranium, thorium, and potassium-40 isotopes detected in boreholes.

Contacts: Carole Johnson
Attribution: Water Resources
Date published: February 24, 2019
Status: Active

Geophysics for USGS Groundwater/Surface Water Interaction Studies

Understanding the interaction of groundwater and surface water is essential to water managers and hydrologists for the development of effective water-resource policy, protection, and management. The USGS conducts applied research to evaluate the use of new or emerging hydrogeophysical tools and methods to improve our understanding of groundwater/surface-water exchange.

Attribution: Water Resources