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.
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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Annotated bibliography of scientific research on Taeniatherum caput-medusae published from January 2010 to January 2022 Annotated bibliography of scientific research on Taeniatherum caput-medusae published from January 2010 to January 2022
Integrating recent scientific knowledge into management decisions supports effective natural resource management and can lead to better resource outcomes. However, finding and accessing scientific knowledge can be time consuming and costly. To assist in this process, the U.S. Geological Survey is creating a series of annotated bibliographies on topics of management concern for western...
Authors
Jennifer K. Meineke, Logan M. Maxwell, Alison C. Foster, Laine E. McCall, Tait K. Rutherford, Ella M. Samuel, Lea B. Selby, Joshua S Willems, Nathan J. Kleist, Samuel E. Jordan
Guide to per- and polyfluoroalkyl substances (PFAS) sampling within Natural Resource Damage Assessment and Restoration Guide to per- and polyfluoroalkyl substances (PFAS) sampling within Natural Resource Damage Assessment and Restoration
Per- and polyfluoroalkyl substances (PFAS) are synthetic chemicals with a nondegradable fluorinated carbon backbone that have been incorporated in countless industrial and commercial applications. Because PFAS are nondegradable, they have been detected in all environmental media, indicating extensive global contamination. The unique physiochemical properties of PFAS and their complex...
Authors
Erin L. Pulster, Sarah R. Bowman, Landon Keele, Jeffery A. Steevens
Effects of culverts on habitat connectivity in streams—A science synthesis to inform National Environmental Policy Act analyses Effects of culverts on habitat connectivity in streams—A science synthesis to inform National Environmental Policy Act analyses
The U.S. Geological Survey is working with Federal land management agencies to develop a series of science syntheses to support environmental effects analyses that agencies conduct to comply with the National Environmental Policy Act (NEPA). This report synthesizes science information about the potential effects of culverts on stream connectivity and subsequent effects on fish. We...
Authors
Richard J. Lehrter, Tait K. Rutherford, Jason Dunham, Aaron N. Johnston, David J.A. Wood, Travis S. Haby, Sarah K. Carter
Approaches for using CMIP projections in climate model ensembles to address the ‘hot model’ problem Approaches for using CMIP projections in climate model ensembles to address the ‘hot model’ problem
Several recent generation global-climate models were found to have anomalously high climate sensitivities and may not be useful for certain applications. Four approaches for developing ensembles of climate projections for applications that address this issue are:Using an “all models” approach;Screening using equilibrium climate sensitivity and (or) transient climate response;Bayesian...
Authors
Ryan Boyles, Catherine A. Nikiel, Brian W. Miller, Jeremy S. Littell, Adam J. Terando, Imtiaz Rangwala, Jay R. Alder, Derek H. Rosendahl, Adrienne M. Wootten
Hydrologic analysis of an earthen embankment dam in southern Westchester County, New York Hydrologic analysis of an earthen embankment dam in southern Westchester County, New York
In 2001, the New York City Department of Environmental Protection installed 25 wells on the southern embankment of the Hillview Reservoir in Westchester County in an unsuccessful attempt to locate the source of a large seep (seep A) that began flowing continuously in 1999. In 2005, the U.S. Geological Survey began a cooperative study with the NYCDEP to characterize the hydrology of the...
Authors
Anthony Chu, Michael L. Noll, William D. Capurso, Robert J. Welk
Yellowstone River fish bypass channel physical and hydraulic monitoring, Montana Yellowstone River fish bypass channel physical and hydraulic monitoring, Montana
The U.S. Geological Survey, in cooperation with the Bureau of Reclamation, began monitoring the Yellowstone River fish bypass channel according to the specifications of the Lower Yellowstone Adaptive Management and Monitoring Plan. The fish bypass channel was constructed to provide upstream migrating fish with a route around a diversion dam. The objective of this study is to monitor the...
Authors
J. Brooks Stephens, Jason S. Alexander, Seth A. Siefken