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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The 3D Elevation Program—Supporting North Dakota's economy The 3D Elevation Program—Supporting North Dakota's economy
Introduction As the northernmost Great Plains State encompassing two geomorphological areas divided by the Missouri River, North Dakota has varied needs for high-resolution elevation data. The top industry in North Dakota is agriculture and related products, and the fastest growing sector is natural resources led by oil and gas extraction and mining, all of which contribute to the State...
Authors
Elaine Guidero
Petrography and mineralogy of selected pre-Middle Jurassic basement rocks beneath the Atlantic and Gulf Coastal Plains in Florida Petrography and mineralogy of selected pre-Middle Jurassic basement rocks beneath the Atlantic and Gulf Coastal Plains in Florida
Florida is covered by flat-lying sedimentary strata of the Atlantic and Gulf Coastal Plains. These strata have accumulated since Middle Jurassic time. The pre-Middle Jurassic, or basement, rocks that underlie the Coastal Plain in Florida are known only from drill cores and cuttings recovered from a relatively small number of boreholes. This data report presents petrographic observations...
Authors
Ryan T. Deasy, Mary E. Lupo, Ryan J. McAleer, J. Wright Horton,
Assessing the state of hydrologic science in the Upper Klamath Basin—A comprehensive review of data, tools, and models Assessing the state of hydrologic science in the Upper Klamath Basin—A comprehensive review of data, tools, and models
Water demand in the Upper Klamath Basin (UKB) from various stakeholders and ecological needs often outstrips available supply, leading to persistent management challenges. This study reviews the state of hydrologic science within the UKB as of 2025—specifically, the tools, data, and models available for assessing five key components of the water system: (1) surface water; (2)...
Authors
Adam J. Stonewall, Tessa M. Harden, Justin K. Reale, Cortney R. Cameron
Field methods, quality-assurance, and data management plan for water-quality activities and water-level measurements, Idaho National Laboratory, Idaho Field methods, quality-assurance, and data management plan for water-quality activities and water-level measurements, Idaho National Laboratory, Idaho
Introduction Water-quality activities and water-level measurements conducted by the U.S. Geological Survey (USGS) Idaho National Laboratory (INL) Project Office coincide with the USGS mission of evaluating the quantity and quality of the Nation’s water resources. The activities are conducted in cooperation with the U.S. Department of Energy’s (DOE) Idaho Operations Office. Results of...
Authors
Kerri C. Treinen, Allison R. Trcka, Jeffrey A. Zingre, Amy J. Wehnke
Production of mineral commodities and geospatial map of the mineral industries and related infrastructure of China Production of mineral commodities and geospatial map of the mineral industries and related infrastructure of China
As part of the U.S. Geological Survey’s (USGS) mission to distribute global mineral information and analyze supply chains, this study provides a comprehensive review of the global significance of China’s mineral production and capacity in 2023. Of 77 mineral commodities in the USGS dataset, China produced 74 and was the world’s first-ranked producer for 39 of the 74. Compared to the high...
Authors
Jaewon Chung, Elizabeth R. Neustaedter, Ji Won Moon, Sean Xun, Steven D. Textoris
Tephra from Kīlauea’s 2008–2018 lava lake eruption—Proximal deposits and dispersal characteristics Tephra from Kīlauea’s 2008–2018 lava lake eruption—Proximal deposits and dispersal characteristics
A network of ten buckets was established early in the 2008–2018 summit eruption at Kīlauea to collect proximal tephra ejected from the new, informally named the “Overlook crater”; the buckets were emptied on most days of the eruption thereafter. This report summarizes the results of more than 2,400 different sampling intervals (most 1–3 days long) during the eruption, focusing on the...
Authors
Don Swanson, Tim R. Orr, Matthew R. Patrick, Bruce F. Houghton
Estimation, distribution, and development of a surrogate model for Escherichia coli in the New River, New River Gorge National Park and Preserve, West Virginia, 2021–23 Estimation, distribution, and development of a surrogate model for Escherichia coli in the New River, New River Gorge National Park and Preserve, West Virginia, 2021–23
The New River Gorge National Park and Preserve in West Virginia receives more than 1 million visitors each year, many of whom come to enjoy the New River, which is known for its whitewater recreation. However, most of the tributaries within the New River Gorge are impaired by fecal-coliform bacteria, which are at concentrations that may exceed recreational-contact standards, posing a...
Authors
Matthew R. Kearns, Douglas B. Chambers
Development of projected depth-duration-frequency curves for precipitation in Florida, 2020–59 and 2050–89 Development of projected depth-duration-frequency curves for precipitation in Florida, 2020–59 and 2050–89
The planning, permitting, and design of stormwater-management projects require estimates of the depths of extreme precipitation for current and future events with specified durations and return periods. In this project, precipitation data from six downscaled climate datasets were used to determine changes in precipitation depth-duration-frequency curves from the period 1966–2005 to the...
Authors
Michelle M. Irizarry-Ortiz
Assessment of undiscovered continuous oil and gas resources in the Amu Darya Basin Province of Turkmenistan, Uzbekistan, and Afghanistan, 2026 Assessment of undiscovered continuous oil and gas resources in the Amu Darya Basin Province of Turkmenistan, Uzbekistan, and Afghanistan, 2026
Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean continuous resources of 519 million barrels of oil and 82.9 trillion cubic feet of gas in the Amu Darya Basin Province of Turkmenistan, Uzbekistan, and Afghanistan.
Authors
Christopher J. Schenk, Tracey J. Mercier, Phuong A. Le, Andrea D. Cicero, Sarah E. Gelman, Jane S. Hearon, Benjamin G. Johnson, Jenny H. Lagesse, Heidi M. Leathers-Miller
Evaluation of a eutrophication Beneficial Use Impairment in the Grand Calumet River Area of Concern in northwest Indiana, 2021–22 Evaluation of a eutrophication Beneficial Use Impairment in the Grand Calumet River Area of Concern in northwest Indiana, 2021–22
Eutrophication has been regularly documented in the Grand Calumet River and Indiana Harbor Canal in northwest Indiana. The area has undergone various remediation efforts since the development of a Remedial Action Plan for the area in response to a 1987 amendment to the Great Lakes Water Quality Agreement of 1978 between the United States and Canada and the designation of the Grand...
Authors
Becky Hammer-Lester, Aleia Dumond, Myles T. Moore, Amy Story, Dawn Shively, Muruleedhara N. Byappanahalli, Aaron Aunins, David C. Lampe
Southwest Climate Adaptation Science Center general information handout Southwest Climate Adaptation Science Center general information handout
No abstract available.
Authors
Sierra Olivia Brown
Distribution, abundance, and breeding activities of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the San Dieguito River and upper San Luis Rey River, San Diego County, California—2025 data summary Distribution, abundance, and breeding activities of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the San Dieguito River and upper San Luis Rey River, San Diego County, California—2025 data summary
Executive Summary We surveyed for Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) at the San Dieguito River and the upper San Luis Rey River in 2025. Surveys were completed at five locations: one along the San Dieguito River (San Dieguito [SD]), which was last surveyed in 2016, and four along the upper San Luis Rey River, including three downstream from Lake...
Authors
Scarlett L. Howell, Barbara E. Kus