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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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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Colorado River Basin Actionable and Strategic Integrated Science and Technology (ASIST) Colorado River Basin Actionable and Strategic Integrated Science and Technology (ASIST)
Introduction The U.S. Geological Survey (USGS) is initiating a study approach focused on building cross-disciplinary connections to weave together the scientific knowledge related to drought conditions and effects in the Colorado River Basin. The basin is experiencing the worst drought in recorded history, posing unprecedented new challenges in the basin and in areas relying on water...
Authors
Katharine G. Dahm, Daniel K. Jones, Patrick J. Anderson, Meghan C. Dick, Todd Hawbaker, Robert Horton
Colorado River Basin Actionable and Strategic Integrated Science and Technology Project—Science strategy Colorado River Basin Actionable and Strategic Integrated Science and Technology Project—Science strategy
The U.S. Geological Survey (USGS) conducts a wide variety of science that improves understanding of droughts and their effects on ecosystems and society. This work includes data collection and monitoring of aquatic and terrestrial systems; assessment and analysis of patterns, trends, drivers, and impacts of drought; development and application of predictive models; and delivery of...
Authors
Katharine G. Dahm, Todd Hawbaker, Rebecca J. Frus, Adrian P. Monroe, John B. Bradford, William J. Andrews, Alicia A. Torregrosa, Eric D. Anderson, David J. Dean, Sharon L. Qi
Hydrologic change in the St. Louis River Basin from iron mining on the Mesabi Iron Range, northeastern Minnesota Hydrologic change in the St. Louis River Basin from iron mining on the Mesabi Iron Range, northeastern Minnesota
This study compares the results of two regional steady-state U.S. Geological Survey Modular Three-Dimensional Finite-Difference Ground-Water Flow (MODFLOW) models constructed to quantify the hydrologic changes in the St. Louis River Basin from iron mining on the Mesabi Iron Range in northeastern Minnesota. The U.S. Geological Survey collaborated in this study with bands of the Minnesota...
Authors
Timothy K. Cowdery, Anna C. Baker, Megan J. Haserodt, Daniel T. Feinstein, Randall J. Hunt
Continuous stream discharge, salinity, and associated data collected in the lower St. Johns River and its tributaries, Florida, 2021 Continuous stream discharge, salinity, and associated data collected in the lower St. Johns River and its tributaries, Florida, 2021
The U.S. Army Corps of Engineers, Jacksonville District, is deepening the St. Johns River channel in Jacksonville, Florida, by 7 feet along 13 miles of the river channel beginning at the mouth of the river at the Atlantic Ocean, in order to accommodate larger, fully loaded cargo vessels. The U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers, monitored stage...
Authors
Patrick J. Ryan
Interaction of a legacy groundwater contaminant plume with the Little Wind River from 2015 through 2017, Riverton Processing site, Wyoming Interaction of a legacy groundwater contaminant plume with the Little Wind River from 2015 through 2017, Riverton Processing site, Wyoming
The Riverton Processing site was a uranium mill 4 kilometers southwest of Riverton, Wyoming, that prepared uranium ore for nuclear reactors and weapons from 1958 to 1963. The U.S. Department of Energy completed surface remediation of the uranium tailings in 1989; however, groundwater below and downgradient from the tailings site and nearby Little Wind River was not remediated. Beginning...
Authors
David L. Naftz, Christopher C. Fuller, Robert L. Runkel, John Solder, W. Payton Gardner, Neil C. Terry, Martin A. Briggs, Terry M. Short, Daniel J. Cain, William L Dam, Patrick A. Byrne, James R. Campbell
Assessment of habitat use by juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Willamette River Basin, 2020–21 Assessment of habitat use by juvenile Chinook salmon (Oncorhynchus tshawytscha) in the Willamette River Basin, 2020–21
We conducted a field study during 2020–21 to describe habitat use patterns of juvenile Chinook salmon (Oncorhynchus tshawytscha) in the mainstem Willamette, McKenzie, and Santiam Rivers and to evaluate how habitat suitability criteria affected the predictive accuracy of a hydraulic habitat model. Two approaches were used to collect habitat use data: a stratified sampling design was used...
Authors
Gabriel S. Hansen, Russell W. Perry, Tobias J. Kock, James S. White, Philip V. Haner, John M. Plumb, J. Rose Wallick