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.
Filter Total Items: 85231
FY 2023 herring disease program annual report FY 2023 herring disease program annual report
No abstract available.
Authors
Paul Hershberger, David James Páez
Surface elevation trends in North Carolina's coastal wetlands Surface elevation trends in North Carolina's coastal wetlands
Coastal wetlands exist in the narrow fringe between uplands and open water and consequently, are uniquely vulnerable to the impacts of sea level rise (SLR). Predictive models suggest that in the coming decades sea level rise will lead to substantial losses of coastal wetland habitat in North Carolina. Empirical measurements of wetland response to SLR are vital for understanding which...
Authors
Robbie Fearn, Cat Bowler, Rick Savage, Pat Donovoan-Bradenburg, Aaron Houran, Reide Corbett, Stu Hamilton, Carolyn Currin, Jenny Davis, Michael Greene, Anna Hilting, Brandon Puckett, Quentin Walker, Justin Ridge, Cayla Cothron, Sarah Spiegler, Marcelo Ardón, Mike Burchell, Nisse Goldberg, Aaron McCall, Eric Soderholm, Christine Voss, Lorie Sutter, Michelle C. Moorman, Justine Annaliese Neville, Ches Vervaeke
Determining the distribution, status, and linkages of Agassiz's desert tortoise populations in the uplands surrounding the Coachella Valley Determining the distribution, status, and linkages of Agassiz's desert tortoise populations in the uplands surrounding the Coachella Valley
In support of the goals of the Coachella Valley Conservation Commission and the Bureau of Land Management, we performed surveys to determine the status, distribution, demographics, and possible genetic linkages of Agassiz’s desert tortoise (Gopherus agassizii) populations within the Coachella Valley Multiple Species Habitat Conservation Plan (CVMSHCP) area during a multi-decadal...
Authors
Michele R. Puffer, Jeffrey E. Lovich, Kristy L. Cummings
Water resources inventory of the Las Cienegas National Conservation Area, southeastern Arizona Water resources inventory of the Las Cienegas National Conservation Area, southeastern Arizona
The Las Cienegas National Conservation Area was established by the Las Cienegas National Conservation Area Establishment Act of 1999 (Public Law 106–538) and is managed by the Bureau of Land Management. Located in southeastern Arizona, the conservation area contains more than 45,000 acres of rolling grassland, wetlands, and woodlands surrounded by isolated mountain ranges that are part...
Authors
Jon P. Mason
Simulation of groundwater and surface-water interaction and lake resiliency at Crystal Lake, City of Crystal Lake, Illinois Simulation of groundwater and surface-water interaction and lake resiliency at Crystal Lake, City of Crystal Lake, Illinois
The U.S. Geological Survey, in cooperation with the City of Crystal Lake, Illinois, started a study to increase understanding of groundwater and surface-water interaction between the glacial aquifer and the city’s namesake lake, Crystal Lake, and the effect of higher and lower precipitation conditions on groundwater and lake levels. The results from this study could be used by the city...
Authors
Amy M. Gahala, Emilia L. Bristow, Jennifer B. Sharpe, Benjamin G Metcalf, Lisa A. Matson
Status of water-level altitudes and long-term and short-term water-level changes in the Chicot and Evangeline (undifferentiated) and Jasper aquifers, greater Houston area, Texas, 2023 Status of water-level altitudes and long-term and short-term water-level changes in the Chicot and Evangeline (undifferentiated) and Jasper aquifers, greater Houston area, Texas, 2023
Since the early 1900s, groundwater withdrawn from the primary aquifers that compose the Gulf Coast aquifer system—the Chicot, Evangeline, and Jasper aquifers—has been an important source of water in the greater Houston area, Texas. This report, prepared by the U.S. Geological Survey in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence...
Authors
Jason K. Ramage
Trends in colony sizes for five colonial waterbird species in the Atlantic Flyway Trends in colony sizes for five colonial waterbird species in the Atlantic Flyway
Robust estimates of colonial waterbird (CWB) breeding population trends are deficient owing to a lack of range wide, standardized survey efforts. Evaluating conservation priorities and effectiveness of management requires reliable trend estimates across multiple spatial scales. One potential data source for CWB trend estimation is the Colonial Waterbird Database, created in 2003 by U.S...
Authors
Zachary G. Loman, Cynthia S. Loftin, Caleb S. Spiegel, Ruth Boettcher
Development and calibration of HEC–RAS hydraulic, temperature, and nutrient models for the Mohawk River, New York Development and calibration of HEC–RAS hydraulic, temperature, and nutrient models for the Mohawk River, New York
In support of a preliminary analysis performed by New York State Department of Environmental Conservation that found elevated nutrient levels along selected reaches of the Mohawk River, a one-dimensional, unsteady hydraulic and water-quality model (Hydrologic Engineering Center River Analysis System Nutrient Simulation Module 1 [HEC–RAS NSM I]) was developed by the U.S. Geological Survey...
Authors
Thomas P. Suro, Michal J. Niemoczynski, Anna Boetsma
Invasive species research—Science for prevention, detection, containment, and control Invasive species research—Science for prevention, detection, containment, and control
Introduction Invasive species research within the U.S. Geological Survey’s (USGS) Ecosystems Mission Area focuses on invasive plants, animals, and pathogens throughout the United States. USGS scientists provide science support to help solve the problems posed by these nonnative species while working with partners in the U.S. Department of the Interior (DOI), other Federal, State, and...
Authors
Paul J. Heimowitz, Patrick M. Kocovsky, James J. English
Range-wide population trend analysis for greater sage-grouse (Centrocercus urophasianus)—Updated 1960–2023 Range-wide population trend analysis for greater sage-grouse (Centrocercus urophasianus)—Updated 1960–2023
Greater sage-grouse (Centrocercus urophasianus) are at the center of state and national land-use policies largely because of their unique life-history traits as an ecological indicator for health of sagebrush ecosystems. This updated population trend analysis provides state and federal land and wildlife managers with best-available science to help guide management and conservation plans...
Authors
Brian G. Prochazka, Peter S. Coates, Cameron L. Aldridge, Michael S. O’Donnell, David R. Edmunds, Adrian P. Monroe, Steve E. Hanser, Lief A. Wiechman, Michael P. Chenaille
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The conceptual risk framework, previously developed by the U.S. Geological Survey, for uranium mining was updated to include indigenous knowledge components informed by the Havasupai Tribe perspective. This General Information Product was designed to show the contaminant exposure framework from the Havasupai perspective in the Havasupai language.
Authors
Carletta Tilousi, Jo Ellen Hinck
Evaluation and review of best management practices for the reduction of polychlorinated biphenyls to the Chesapeake Bay Evaluation and review of best management practices for the reduction of polychlorinated biphenyls to the Chesapeake Bay
Polychlorinated biphenyls (PCBs) continue to impact the environment due to historic and ongoing anthropogenic sources (for example, industrial and agricultural), despite their ban. Contaminated stormwater has been identified as a vector for PCB transport to many estuaries impaired by PCBs. Management of these regulated discharges is typically achieved by best management practices (BMPs)...
Authors
Trevor P. Needham, Emily H. Majcher, Ellie P. Foss, Olivia Devereux