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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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Flood-Inundation Maps of the Current and Jacks Fork Rivers including the Ozark National Scenic Riverways, Southeast Missouri, 2023 Flood-Inundation Maps of the Current and Jacks Fork Rivers including the Ozark National Scenic Riverways, Southeast Missouri, 2023
Digital flood-inundation maps for a 131.8-mile reach of the Current River and a 44.6-mile reach of the Jacks Fork River, in southeast Missouri, were created by the U.S. Geological Survey (USGS) in cooperation with the Ozark Foothills Regional Planning Commission and the South Central Ozark Council of Governments. The maps also encompass the 134 miles of the Current and Jacks Fork Rivers...
Authors
David C. Heimann, Jason L. High, Allison A. Atkinson, Paul H. Rydlund
ShakeAlert®—Communication, education, outreach and technical engagement strategic vision ShakeAlert®—Communication, education, outreach and technical engagement strategic vision
Executive Summary In 2006, the U.S. Geological Survey (USGS) began directly supporting ShakeAlert® research and in 2012 the ShakeAlert demonstration system began testing (Given and others, 2018). The ShakeAlert earthquake early warning (EEW) system is a partnership between the U.S. Geological Survey (USGS) and the three West Coast States (Washington, Oregon, and California) served by the
Authors
Robert Michael deGroot, Sara K. McBride, Margaret J. Vinci, Gabriel C. Lotto, Megan L. Anderson, Danielle F. Sumy, Brian Terbush
Flood-inundation maps for Río de la Plata in and near Comerío, Puerto Rico, 2025 Flood-inundation maps for Río de la Plata in and near Comerío, Puerto Rico, 2025
Digital flood-inundation maps for a 3.1-mile reach of Río de la Plata in and near Comerío, Puerto Rico, were created by the U.S. Geological Survey (USGS). Water-surface profiles were computed for the stream reach by using a one-dimensional steady-state step-backwater model. The model was calibrated to the current (2025) stage-streamflow relation (rating curve 11.0) for the USGS...
Authors
Chad J. Ostheimer, Legna M. Torres-Garcia
Characterization of suspended sediment flux and streamflow trends in the Fountain Creek watershed, Colorado, 1998 through 2022 Characterization of suspended sediment flux and streamflow trends in the Fountain Creek watershed, Colorado, 1998 through 2022
The U.S. Geological Survey evaluated long-term suspended sediment flux and streamflow datasets for temporal trends (monotonic and step trends) at 10 streamgage sites within the Fountain Creek watershed in central Colorado using the Mann-Kendall test (monotonic trend) and the Wilcoxon signed-rank test (step trend). Data were collected in cooperation with Colorado Springs Stormwater...
Authors
Myles S. Downhour, Erin K. Hennessy, Carleton R. Bern
Earth Mapping Resources Initiative protocols—Sampling hard-rock mine waste and perpetual mine water sources Earth Mapping Resources Initiative protocols—Sampling hard-rock mine waste and perpetual mine water sources
Supporting the overarching goal to evaluate critical minerals nationwide, the mine waste characterization effort in the U.S. Geological Survey (USGS) Earth Mapping Resources Initiative has created a series of protocols to standardize sampling carried out under this effort by the participating State geological surveys and their cooperators. The protocols are based on published, reviewed...
Authors
Kate M. Campbell, Robert R. Seal, Nadine M. Piatak, Jaime S. Azain, Jean M. Morrison, Sarah Jane White, Andrew H. Manning, Katherine Walton-Day, JoAnn M. Holloway, Bronwen Wang
Assessment of channel morphology, hydraulics, and bedload transport along the Siletz River, western Oregon Assessment of channel morphology, hydraulics, and bedload transport along the Siletz River, western Oregon
Significant Findings Chinook salmon (Oncorhynchus tshawytscha) and Pacific lamprey (Entosphenus tridentatus) are native, anadromous fish species in the Siletz River Basin, western Oregon, that face many threats to their survival in freshwater and the ocean. The Confederated Tribes of Siletz Indians of Oregon seek to mitigate freshwater threats to Chinook salmon and Pacific lamprey, where...
Authors
Krista L. Jones, Mackenzie K. Keith, Tessa M. Harden, James S. White, Stan van de Wetering, Jason B. Dunham