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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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Influence of a guide net on the presence and behavior of fish near the selective water withdrawal structure in Lake Billy Chinook, Oregon, 2022 Influence of a guide net on the presence and behavior of fish near the selective water withdrawal structure in Lake Billy Chinook, Oregon, 2022
Imaging sonar was used to assess the influence of a fish guidance net, installed at the entrances to the selective water withdrawal (SWW) intake structure, in the forebay of Round Butte Dam, Oregon, on behavior, abundance, and timing of fish during the spring of 2022. The purposes of the SWW are (1) to direct surface currents in the forebay to attract and collect downriver migrating...
Authors
Collin D. Smith, Tyson W. Hatton
Applying intrinsic potential models to evaluate salmon (Oncorhynchus spp.) introduction into main-stem and tributary habitats upstream from the Skagit River Hydroelectric Project, northern Washington Applying intrinsic potential models to evaluate salmon (Oncorhynchus spp.) introduction into main-stem and tributary habitats upstream from the Skagit River Hydroelectric Project, northern Washington
We assessed habitat suitability for salmonids across selected tributaries upstream from three hydroelectric dams on the upper Skagit River in Whatcom County, northern Washington. We used NetMap, a commercial toolset within the ArcMap geographic information system (GIS), to analyze stream attributes based upon a synthetic stream channel network derived from digital elevation models. The...
Authors
Jeffrey J. Duda, Jill M. Hardiman
Hydrogeology, karst, and groundwater availability of Monroe County, West Virginia Hydrogeology, karst, and groundwater availability of Monroe County, West Virginia
Monroe County is in southeastern West Virginia, encompassing an area of 474 square miles. The area consists of karst and siliciclastic aquifers of Ordovician, Silurian, Devonian, and Mississippian age and is in parts of two physiographic provinces: the Valley and Ridge Province to the east of Peters Mountain, and the Appalachian Plateau Province to the west of Peters Mountain. This study...
Authors
Mark D. Kozar, Daniel H. Doctor, William K. Jones, Nathan Chien, Cheyenne E. Cox, Randall C. Orndorff, David J. Weary, Mitchell R. Weaver, Mitchell A. McAdoo, Mercer Parker
Assessment of prerestoration water quality in the Herring River to support adaptive management at the Cape Cod National Seashore Assessment of prerestoration water quality in the Herring River to support adaptive management at the Cape Cod National Seashore
In 2020 and 2021, the U.S. Geological Survey, Cape Cod National Seashore of the National Park Service, and Friends of Herring River cooperated to assess nutrient and suspended sediment concentrations across the ocean-estuary boundary at a dike on the Herring River on Chequessett Neck Road in Wellfleet, Massachusetts, that has restricted saltwater inputs by regulating water inflow through...
Authors
Thomas G. Huntington
Characterizing urban heat islands across 50 major cities in the United States Characterizing urban heat islands across 50 major cities in the United States
Urban development and associated land-cover and land-use change alters the environment. The continued increase of developed land changes the Earth’s ecosystems and affects the resources provided to society. During the last 40 years, urban population in the United States has increased by more than 6.3 percent, and more than 80 percent of the U.S. population resides in urban areas. One of...
Authors
George Z. Xian
Assessing the use of long-term lek survey data to evaluate the effect of landscape characteristics and wind facilities on sharp-tailed grouse lek dynamics in North Dakota and South Dakota Assessing the use of long-term lek survey data to evaluate the effect of landscape characteristics and wind facilities on sharp-tailed grouse lek dynamics in North Dakota and South Dakota
The contribution of renewable energy to meet worldwide demand continues to grow. In the United States, wind energy is one of the fastest growing renewable energy sectors. Throughout the Great Plains of the United States, wind facilities often are placed in open landscapes of high-elevation grasslands, and those same habitats support sharp-tailed grouse (Tympanuchus phasianellus), a...
Authors
Jill A. Shaffer, Deborah A. Buhl, Wesley E. Newton
Delineating spatial units for coregonine conservation, restoration, and stewardship Delineating spatial units for coregonine conservation, restoration, and stewardship
No abstract available.
Authors
Amanda Susanne Ackiss, Ralph Grundel, Jory L. Jonas, Naomi Jones, Trevor J. Krabbenhoft, Ryan Lauzon, Nicholas E. Mandrak, Brian O’Malley, Devon Pearse, Thomas C. Pratt, Breanna Redford, Mark Ridgway, Jason Smith, Andrew M. Muir
Feasibility of implementing a long-term plan to monitor the Arctic Basin polar bear subpopulation Feasibility of implementing a long-term plan to monitor the Arctic Basin polar bear subpopulation
The Arctic Basin (AB) polar bear subpopulation is the least studied of the 19 global polar bear subpopulations. The Polar Bear Specialist Group (PBSG) recognizes the AB subpopulation as a regional grouping intended to include bears that do not belong to any of the remaining subpopulations that have data to support boundary delineations. Very little is currently known about the AB...
Authors
Ryan H. Wilson, Jon Aars, Todd C. Atwood, Evan Richardson
Panel review of Ground Motion Characterization Model in 2023 NSHM Panel review of Ground Motion Characterization Model in 2023 NSHM
The 2023 National Seismic Hazard Model (NSHM; Petersen et al., 2023) has two major components – a seismic source characterization (SSC) model and a ground motion characterization (GMC) model. The US Geological Survey (USGS) established separate panels to review and provide input on these two models. Both panels are advisory, meaning that they provide input on technical issues for...
Authors
Jonathan P. Stewart, Norman A. Abrahamson, Gail M. Atkinson, John G. Anderson, Kenneth W. Campbell, Chris H. Cramer, Michael Kolaj, Grace Alexandra Parker
Site occupancy of focal shorebird species at Whiskey Island and Caminada Headland, Louisiana 2012–2020 Site occupancy of focal shorebird species at Whiskey Island and Caminada Headland, Louisiana 2012–2020
Coastal restoration through island construction and augmentation is an increasingly common management method in the northern Gulf of Mexico, but evaluating the impacts to shorebird species is difficult. Shorebirds are mostly migratory and many aspects of their life history, including reproduction in some species, occur in other places. In addition, counts or observations of shorebirds...
Authors
J. Hardin Waddle, Wylie Barrow, Clint W Jeske, Jessica Schulz, Robert C. Dobbs, Delaina LeBlanc, Amanda Nicole Anderson, Brock Greary, Theodore J. Zenzal, Nicholas Enwright, Thurman. Hana, Darin L. Lee
Nisqually River Delta—Humans and nature benefiting together Nisqually River Delta—Humans and nature benefiting together
Introduction This is a brochure created in partnership with the U.S. Geological Survey (USGS), the Nisqually Indian Tribe, and the Billy Frank Jr. Nisqually National Wildlife Refuge. Designed for a public audience, the brochure describes the history of the Nisqually Indian Tribe, the ecology of the delta, the resources and recreational opportunities available for Refuge visitors, future...
Authors
Kristin B. Byrd, Isa Woo, Glynnis Nakai, Debbie Preston, Shonte Jenkins
Conclusions of evaluation of restoration for avian species at Caminada Headland and Whiskey Island, Louisiana Conclusions of evaluation of restoration for avian species at Caminada Headland and Whiskey Island, Louisiana
We conducted various analyses to determine the impact of coastal restoration on several focal avian species at Caminada Headland and Whiskey Island, Louisiana. We assessed if restoration affected avian use of restored sites by determining overall habitat changes, occupancy trends, and impacts of construction activities. Here, we summarize our findings from Chapters 2-9. For more details...
Authors
Darin L. Lee, Amanda Nicole Anderson, Paul Leberg, Nicholas Enwright, J. Hardin Waddle, Delaina LeBlanc, Theodore J. Zenzal