Reports
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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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Groundwater chemistry and water-level elevations in bedrock aquifers of the Piceance and Yellow Creek watersheds, Rio Blanco County, Colorado, 2013–16 Groundwater chemistry and water-level elevations in bedrock aquifers of the Piceance and Yellow Creek watersheds, Rio Blanco County, Colorado, 2013–16
The Piceance and Yellow Creek watersheds in Rio Blanco County, Colorado, are known to contain important energy resources (oil shale and natural gas) and mineral resources (nahcolite). The primary sources of fresh groundwater in the Piceance and Yellow Creek watersheds are bedrock aquifers in the Uinta and Green River Formations. The aquifers are divided into an upper and lower aquifer...
Authors
Judith C. Thomas, Peter B. McMahon
Geology and assessment of undiscovered oil and gas resources of the Long Strait Basin Province, 2008 Geology and assessment of undiscovered oil and gas resources of the Long Strait Basin Province, 2008
The Long Strait Basin is both a stand alone petroleum province and an assessment unit (AU) that lies offshore in the East Siberian Sea north of Chukotka and south of Wrangel Island. This basin is known only on the basis of gravity data and a single proprietary seismic line. In the absence of more specific data, its position and regional setting suggest that it may have petroleum geologic
Authors
Kenneth Bird, David W. Houseknecht, Janet K. Pitman
Water temperature in tributaries, off-channel features, and main channel of the lower Willamette River, northwestern Oregon, summers 2016 and 2017 Water temperature in tributaries, off-channel features, and main channel of the lower Willamette River, northwestern Oregon, summers 2016 and 2017
The U.S. Geological Survey collected continuous water-temperature data in select tributaries of the lowermost 80 kilometers (50 miles) of the Willamette River in northwestern Oregon, during summers 2016 and 2017. Point measurements of water temperature and water quality (dissolved oxygen, specific conductance, and pH) also were collected at multiple locations and depths within the river...
Authors
Joseph F. Mangano, David R. Piatt, Krista L. Jones, Stewart A. Rounds
The Pothole Hydrology-Linked Systems Simulator (PHyLiSS)—Development and application of a systems model for prairie-pothole wetlands The Pothole Hydrology-Linked Systems Simulator (PHyLiSS)—Development and application of a systems model for prairie-pothole wetlands
The North American Prairie Pothole Region covers about 770,000 square kilometers of the United States and Canada (including parts of 5 States and 3 provinces: North Dakota, South Dakota, Montana, Minnesota, Iowa, Saskatchewan, Manitoba, and Alberta). The Laurentide Ice Sheet shaped the landscape of the region about 12,000 to 14,000 years ago. The retreat of the ice sheet left behind low
Authors
Owen P. McKenna, David M. Mushet, Eric J. Scherff, Kyle McLean, Christopher T. Mills
Keeping the crown of the continent connected: An interagency US2 connectivity workshop report Keeping the crown of the continent connected: An interagency US2 connectivity workshop report
At over 2.5 million acres, Glacier National Park and the Bob Marshall Wilderness complex form one of the largest protected areas in the continental United States. Straddling the Continental Divide, these two areas form a vital linkage between vast areas of public land to the south towards Yellowstone, and contiguous protected areas north of the US-Canada border. However, US Highway 2...
Authors
John S. Waller, Tabitha A. Graves
Population genomic surveys for six rare plant species in San Diego County, California Population genomic surveys for six rare plant species in San Diego County, California
San Diego County is a hotspot of biodiversity, situated at the intersection of the Baja peninsula, the California floristic province, and the desert southwest. This hotspot is characterized by a high number of rare and endemic species, which persist alongside a major urban epicenter. San Diego County has implemented a strategic management plan that identifies species, based on low...
Authors
Elizabeth R. Milano, Amy G. Vandergast
Relating cyanobacteria and physicochemical water-quality properties in Willow Creek Lake, Nebraska, 2012–14 Relating cyanobacteria and physicochemical water-quality properties in Willow Creek Lake, Nebraska, 2012–14
Cyanobacteria (also referred to as blue-green algae) are naturally present members of phytoplankton assemblages that may detract from beneficial uses of water because some strains produce cyanotoxins that pose health hazards to people and animals. Cyanobacteria populations observed in Willow Creek Lake during 2012 through 2014 were compared to external nutrient loading from the Willow...
Authors
David L. Rus, Brent M. Hall, Steven A. Thomas
Community for Data Integration fiscal year 2017 funded project report Community for Data Integration fiscal year 2017 funded project report
The U.S. Geological Survey Community for Data Integration annually funds small projects focusing on data integration for interdisciplinary research, innovative data management, and demonstration of new technologies. This report provides a summary of the 11 projects funded in fiscal year 2017, outlining their goals, activities, and outputs.
Authors
Leslie Hsu, Kate E. Allstadt, Tara M. Bell, Erin E. Boydston, Richard A. Erickson, A. Lance Everette, Erika E. Lentz, Jeff Peters, Brian E. Reichert, Sarah Nagorsen, Jason T. Sherba, Richard P. Signell, Mark T. Wiltermuth, John A. Young
Chemical and isotopic characteristics of methane in groundwater of Ohio, 2016 Chemical and isotopic characteristics of methane in groundwater of Ohio, 2016
In 2016, the U.S. Geological Survey, in cooperation with the Ohio Water Development Authority, investigated the hydrogeologic setting, chemical and isotopic characteristics, and origin of methane in groundwater of Ohio. Understanding the occurrence and distribution of methane in groundwater is important in terms of public safety because methane in water wells can pose a risk of explosion...
Authors
Mary Ann Thomas
Unmanned aerial systems capabilities of the U.S. Geological Survey Woods Hole Coastal and Marine Science Center Unmanned aerial systems capabilities of the U.S. Geological Survey Woods Hole Coastal and Marine Science Center
Unmanned aerial system (UAS) technology provides a rapid and low-cost solution for mapping coastal environments and assessing short- and long-term changes. The interdisciplinary nature of the data collected and the breadth of applications make UAS technology applicable to multiple scientific investigations. The Aerial Imaging and Mapping (AIM) group at the U.S. Geological Survey (USGS)...
Authors
Sandra Brosnahan, Christopher R. Sherwood
Flood frequency of rural streams in Mississippi, 2013 Flood frequency of rural streams in Mississippi, 2013
To improve flood-frequency estimates at rural streams in Mississippi, annual exceedance probability flows at gaged streams and regional regression equations used to estimate annual exceedance probability flows for ungaged streams were developed by using current geospatial data, new analytical methods, and annual peak-flow data through the 2013 water year. The regional regression...
Authors
Brandon T. Anderson
New England and northern New York forest ecosystem vulnerability assessment and synthesis: A report from the New England Climate Change Response Framework project New England and northern New York forest ecosystem vulnerability assessment and synthesis: A report from the New England Climate Change Response Framework project
Forest ecosystems will face direct and indirect impacts from a changing climate over the 21st century. This assessment evaluates the vulnerability of forest ecosystems across the New England region (Connecticut, Maine, Massachusetts, New Hampshire, northern New York, Rhode Island, and Vermont) under a range of future climates. We synthesized and summarized information on the contemporary...
Authors
M.K. Janowiak, A D’Amato, C.W. Swanston, Louis R. Iverson, Frank R. Thompson, William D. Dijak, Stephen Matthews, Matthew P. Peters, Anantha Prasad, Jacob S. Fraser, Leslie A. Brandt, Patricia R. Butler-Leopold, Stephen D. Handler, P. Danielle Shannon, Diane Burbank, John Campbell, Charles Cogbill, Matthew J. Duveneck, Marla R. Emery, Nicholas Fisichelli, Jane Foster, Jennifer Hushaw, Laura Kenefic, Amanda Mahaffey, Toni Lyn Morelli, Nicholas Reo, Paul G. Schaberg, K. Rogers Simmons, Aaron Weiskittel, Sandy Wilmot, David Hollinger, Erin Lane, Lindsey Rustad, Pamela H. Templar