Reports

Science Quality and Integrity

The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.

Browse more than 82,000 reports authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.

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February 1, 2023

Improving understanding and coordination of science activities for PFAS in the Chesapeake watershed Improving understanding and coordination of science activities for PFAS in the Chesapeake watershed

No abstract available.

Authors

Kelly L. Smalling, Michelle M. Lorah, Greg Allen, Lee Blaney, Mark Cantwell, Lara Fowler, Thomas F. Ihde, Mark Mank, Emily H. Majcher, George Onyullo, Scott W. Phillips

Water Resources Mission Area, New Jersey Water Science Center

February 1, 2023

Integration of weed-suppressive bacteria with herbicides to reduce exotic annual grasses and wildfire problems on ITD right-of-ways Integration of weed-suppressive bacteria with herbicides to reduce exotic annual grasses and wildfire problems on ITD right-of-ways

Invasion by exotic-annual grasses such as cheatgrass is impacting semiarid rangelands and especially transportation corridors, where it causes increased wildfire and many other environmental issues. Methods of reducing exotic annual grasses and restoring native perennials are needed, particularly testing of their intended target or unintended, non-target effects. In a series of...

Authors

Brynne E. Lazarus, Matthew J. Germino, Toby M. Maxwell

Ecosystems Mission Area, Forest and Rangeland Ecosystem Science Center

January 31, 2023

Monitoring native nonsalmonids for the incidence of gas bubble trauma downstream of Snake and Columbia River dams during the spring spill season, 2022 Monitoring native nonsalmonids for the incidence of gas bubble trauma downstream of Snake and Columbia River dams during the spring spill season, 2022

In 2020, a new spill program was implemented to aid the downstream passage of juvenile salmonids at mainstem dams on the Snake and Columbia rivers. Under this program, the total dissolved gas (TDG) cap was increased to 125% and monitoring of native nonsalmonids for gas bubble trauma (GBT) became a requirement. The primary objective of this work was to measure the incidence and severity...

Authors

Kenneth F. Tiffan, Brad D. Liedtke, Dalton Dirk Lebeda, Scott Louis Benson, Joe J. Warren

Ecosystems Mission Area, Western Fisheries Research Center, Columbia River Research Laboratory (CRRL)

January 31, 2023

Comparison of surrogate models to estimate pesticide concentrations at six U.S. Geological Survey National Water Quality Network sites during water years 2013–18 Comparison of surrogate models to estimate pesticide concentrations at six U.S. Geological Survey National Water Quality Network sites during water years 2013–18

During water years 2013–18, the U.S. Geological Survey National Water-Quality Assessment Project sampled the National Water Quality Network for Rivers and Streams year-round and reported on 221 pesticides at 72 sites across the United States. Pesticides are difficult to measure, their concentrations often represent discrete snapshots in time, and capturing peak concentrations is...

Authors

S. Alex Covert, Aubrey R. Bunch, Charles G. Crawford, Gretchen P. Oelsner

Ohio-Kentucky-Indiana Water Science Center

January 31, 2023

Mineral commodity summaries 2023 Mineral commodity summaries 2023

Each mineral commodity chapter of the 2023 edition of the U.S. Geological Survey (USGS) Mineral Commodity Summaries (MCS) includes information on events, trends, and issues for each mineral commodity as well as discussions and tabular presentations on domestic industry structure, Government programs, tariffs, 5-year salient statistics, and world production, reserves, and resources. The...

National Minerals Information Center

January 30, 2023

Linear regression model documentation for computing water-quality constituent concentrations or densities using continuous real-time water-quality data for the Kansas River above Topeka Weir at Topeka, Kansas, November 2018 through June 2021 Linear regression model documentation for computing water-quality constituent concentrations or densities using continuous real-time water-quality data for the Kansas River above Topeka Weir at Topeka, Kansas, November 2018 through June 2021

The Kansas River and its associated alluvial aquifer provide drinking water to more than 950,000 people in northeastern Kansas. Water suppliers that rely on the Kansas River as a water-supply source use physical and chemical processes to treat and remove contaminants before public distribution. An early-notification system of changing water-quality conditions allows water suppliers to...

Authors

Thomas J. Williams

Water Resources Mission Area, Central Plains Water Science Center