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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Revision of ModelMuse to support the use of PEST software with MODFLOW and SUTRA models
Executive SummaryModelMuse is a graphical user interface for several groundwater modeling programs. ModelMuse was updated to generate the input files for the parameter estimation software suite PEST. The software is used with MODFLOW or SUTRA models to run PEST-based parameter estimation and display the updated model inputs after parameter estimation. The PEST input files can also be used with the
Authors
Richard B. Winston
Volcanoes of American Samoa
Upu Amata (Introduction)O le Atu-Samoa o le tasi lenei o faʻasologa motu mauga mu i le Vasa Pasefika i Saute. O motu e pito i sasaʻe o nei faʻasologa mauga mu o le Atu-Samoa, o motu ia o Amerika Samoa. E tofu lava mauga mu taʻitasi o Amerika Samoa ma ona talaaga aemaise tulaga e tutupu e ono pa ai i le lumanai. O loʻo galulue faʻatasi le Ofisa o le U.S. Geological Survey (USGS) ma le National Ocea
Authors
Natalia I. Deligne, Drew T. Downs, Elinor Lutu-McMoore, Steven Sobieszczyk, Wendy K. Stovall
A literature review and hypsometric analysis to support decisions on trout management flows on the Colorado River downstream from Glen Canyon Dam
Executive SummaryFish stranding has been studied in select rivers worldwide, often with the purpose of determining how to mitigate adverse effects of dam operations on highly valued salmon and trout populations. However, where a reduction in trout population size is desired by resource managers, as is the case downstream of the Glen Canyon Dam on the Colorado River, flow manipulations termed trout
Authors
Mariah Giardina, Josh Korman, Michael D. Yard, Scott Wright, Matthew A. Kaplinski, Glenn Bennett
Projected sea-level rise and high tide flooding at Big Cypress National Preserve, Florida
IntroductionNational parks and preserves in the South Atlantic-Gulf Region contain valuable coastal habitats such as tidal wetlands and mangrove forests, as well as irreplaceable historic buildings and archeological sites located in low-lying areas. These natural and cultural resources are vulnerable to accelerated sea-level rise and escalating high tide flooding events. Through a Natural Resource
Authors
Hana R. Thurman, Nicholas M. Enwright, Michael J. Osland, Davina L. Passeri, Richard H. Day, Bethanie M. Simons, Jeffrey J. Danielson, William M. Cushing
Triangle Area Water Supply Monitoring Project, North Carolina
IntroductionRivers and surface-water reservoirs supply drinking water to most residents throughout the Triangle area in North Carolina. These drinking-water supplies may be at risk because of rapid and continued land use change throughout the region. In partnership with the U.S. Geological Survey, several Triangle-area municipalities established a long-term water-quality and streamflow monitoring
Authors
R. Fanelli, D. Hardesty, J. Diaz
Quantifying the coastal hazard risk reduction benefits of coral reef restoration in the U.S. Virgin Islands
Coastal habitat restoration, especially of coral reef ecosystems, can significantly reduce the exposure of coastal communities to natural hazards and, consequently, the risk of wave-driven flooding. Likewise, reef degradation can increase coastal flood risks to people and property. In this study, the valuation of coral reefs in the United States Virgin Islands (USVI), along the coasts of St. Croix
Authors
Camila Gaido-Lasserre, Valerie Pietsch McNulty, Curt Storlazzi, Borja Reguero, Denise Perez, Sandra Fogg, Kristen A. Cumming, Jessica Ward, Steve Schill, Celeste Jarvis, Michael W. Beck
Low-flow statistics for selected streams in New York, excluding Long Island
The U.S. Geological Survey, in cooperation with the New York State Department of Environmental Conservation, updated low-streamflow statistics for New York, excluding Long Island and including hydrologically connected watersheds in bordering States, for the first time since 1972. Historical daily streamflow data for active and inactive gages were considered for this study with periods of record as
Authors
Timothy J. Stagnitta, Alexander P. Graziano, Joshua C. Woda, Robin L. Glas, Christopher L. Gazoorian
Abundance and distribution of white-tailed deer on First State National Historical Park and surrounding lands
We estimated both abundance and distribution of white-tailed deer (Odocoileus virginianus) on the Brandywine Valley unit of First State National Historical Park (FRST) and the Brandywine Creek State Park (BCSP) during 2020 and 2021 with two widely used field methods — a road-based count and a network of camera traps. We conducted 24 road-based counts, covering 260 km of roadway, and deployed up to
Authors
H. Brian Underwood, Madison R. Hand, Donald J. Leopold
Incorporating climate data into emergency planning and exercises: A primer for emergency management practioners and data developers
Climate change has and will continue to sharpen climate-related risks to communities and natural resources in California and elsewhere, as the probabilities of more extreme weather, floods, and fires continue to increase. This poses a problem of novel situations for emergency management. Progress has been made in terms of formally incorporating climate projections, data, and research on expected c
Authors
Christine M. Albano, Maureen I. McCarthy, Stephanie Anne Mcafee, Anne Wein, Michael D. Dettinger
Living with wildfire in Lake Wenatchee, Chelan County, Washington: 2022 Data report
Community wildfire readiness includes actions taken by residents, including wildfire risk mitigation at the parcel level and evacuation preparedness. This report presents results from two data collection efforts in the Lake Wenatchee Fire & Rescue service district in Chelan County, Washington: parcel level rapid wildfire risk assessments and household surveys sent to the owners of assessed parcel
Authors
Julia Goolsby, Patricia A. Champ, Suzanne Wittenbrink, Colleen Donovan, Kris King, Hannah Brenkert-Smith, James Meldrum, Christopher M. Barth, Carolyn Wagner, Chiara Forrester
Bottom trawl assessment of Lake Ontario's benthic preyfish community, 2023
Since 1978, surveys of Lake Ontario preyfish communities have provided information on the status and trends of the benthic preyfish community related to Fish Community Objectives that includes understanding preyfish population dynamics and community diversity. Beginning in 2015, the benthic preyfish survey expanded from US-only to incorporate Canadian sites, increasing the survey’s spatial coverag
Authors
Brian O'Malley, Scott P. Minihkeim, Olivia Margaret Mitchinson, Scott David Stahl, Jessica A Goretzke, Jeremy P. Holden
Methods for computing water-quality concentrations and loads at sites operated by the U.S. Geological Survey Kansas Water Science Center
The U.S. Geological Survey (USGS) Kansas Water Science Center (KSWSC) has published time-series computations of water-quality concentrations and loads based on in situ sensor data since 1995. Water-quality constituent concentrations or densities are computed using regression models that relate in situ sensor values to laboratory analyses of periodically collected samples. These regression models c
Authors
Mandy L. Stone, Casey J. Lee, Teresa J. Rasmussen, Thomas J. Williams, Ariele R. Kramer, Brian J. Klager