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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Monitoring long-term changes in forage fish distribution, abundance and body condition in Prince William Sound Monitoring long-term changes in forage fish distribution, abundance and body condition in Prince William Sound
Identifying drivers of change in forage fish populations is key to understanding recovery potential for piscivorous species injured by the Exxon Valdez oil spill, and ecosystem response to natural and anthropogenic perturbations. Forage fish are small pelagic schooling fish such as Pacific capelin (Mallotus catervarius), Pacific sand lance (Ammodytes personatus), Pacific herring (Clupea...
Authors
Mayumi L. Arimitsu, John F. Piatt, Scott Hatch, Caitlin Elizabeth Marsteller, Daniel Stephen Donnelly, Shannon Whelan
Wind River Subbasin Restoration Annual Report of USGS Activities January 2021 through December 2022 Wind River Subbasin Restoration Annual Report of USGS Activities January 2021 through December 2022
We sampled juvenile wild Steelhead Trout Oncorhynchus mykiss in headwater streams of the Wind River, WA, to characterize population attributes and investigate life-history metrics, particularly migratory patterns, and early life-stage survival. We used passive integrated transponder (PIT) tagging and a series of instream PIT-tag interrogation systems (PTISs) to track juveniles and adults...
Authors
Ian Jezorek
Restoration of Gavia immer (common loon) in Minnesota—2022 annual report Restoration of Gavia immer (common loon) in Minnesota—2022 annual report
The explosion of the Deepwater Horizon mobile drilling platform on April 20, 2010, caused a massive oil spill and injury to natural resources in the Gulf of Mexico. Gavia immer (common loon) were negatively affected from the spill. The Open Ocean Trustee Implementation Group funded the project “Restoration of Common Loons in Minnesota” to restore common loons lost to the spill. Here, we...
Authors
William S. Beatty, Luke J. Fara, Steven C. Houdek, Robert Rabasco, Spencer Rettler, Elizabeth Rasmussen, Kevin P. Kenow, Brian R. Gray, Steven Yang, Kelly Amoth
Roles of regional structures and country-rock facies in defining mineral belts in central Idaho mineral province with detail for Yellow Pine and Thunder Mountain mining districts Roles of regional structures and country-rock facies in defining mineral belts in central Idaho mineral province with detail for Yellow Pine and Thunder Mountain mining districts
The central Idaho metallogenic province hosts numerous mineral deposit types. These include Late Cretaceous precious-polymetallic vein deposits, amagmatic Paleocene–Eocene breccia-hosted gold-tungsten-antimony deposits, and Eocene mercury deposits in metasedimentary roof pendants and in Late Cretaceous granitoids. Hot-springs gold deposits in Eocene volcanic rocks are also included in...
Authors
Karen Lund, John N. Aleinikoff, Christopher S. Holm-Denoma
Modeling the water-quality effects to the Klamath River from recirculation in drains and canals, Oregon and California, 2006–15 Modeling the water-quality effects to the Klamath River from recirculation in drains and canals, Oregon and California, 2006–15
The potential recirculation of Klamath Strait Drain (hereafter called by its local name, “Klamath Straits Drain”) water into Ady Canal to reduce the drain discharge of high nutrient loads into the Klamath River was assessed by the U.S. Geological Survey for the Bureau of Reclamation. To study the feasibility of recirculation, this investigation evaluated three recirculation scenarios...
Authors
Erik A. Smith, Annett B. Sullivan
Hydrogeology and simulated groundwater availability in reaches 3 and 4 of the Washita River aquifer, southern Oklahoma, 1980–2017 Hydrogeology and simulated groundwater availability in reaches 3 and 4 of the Washita River aquifer, southern Oklahoma, 1980–2017
The 1973 Oklahoma Groundwater Law (Oklahoma Statutes §82–1020.5) requires that the Oklahoma Water Resources Board conduct hydrologic investigations of the State’s aquifers to determine the maximum annual yield for each groundwater basin. Because more than 20 years have elapsed since the final order was issued, the U.S. Geological Survey, in cooperation with the Oklahoma Water Resources...
Authors
Ian M.J. Rogers, S. Jerrod Smith, Nicole C. Gammill, Natalie J. Gillard, Kayla A. Lockmiller, Evin J. Fetkovich, Jessica S. Correll, Sean P. Hussey