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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Groundwater quality, age, and susceptibility and vulnerability to nitrate contamination with linkages to land use and groundwater flow, Upper Black Squirrel Creek Basin, Colorado, 2013 Groundwater quality, age, and susceptibility and vulnerability to nitrate contamination with linkages to land use and groundwater flow, Upper Black Squirrel Creek Basin, Colorado, 2013
The Upper Black Squirrel Creek Basin is located about 25 kilometers east of Colorado Springs, Colorado. The primary aquifer is a productive section of unconsolidated deposits that overlies bedrock units of the Denver Basin and is a critical resource for local water needs, including irrigation, domestic, and commercial use. The primary aquifer also serves an important regional role by the...
Authors
Tristan P. Wellman, Michael G. Rupert
Get your science used—Six guidelines to improve your products Get your science used—Six guidelines to improve your products
Authors
Suzanne C. Perry, Michael L. Blanpied, Erin R. Burkett, Nnenia M. Campbell, Anders Carlson, Dale A. Cox, Carolyn L. Driedger, David P. Eisenman, Katherine T. Fox-Glassman, Sherry Hoffman, Susanna M. Hoffman, Kishor S. Jaiswal, Lucile M. Jones, Nico Luco, Sabine M. Marx, Sean M. McGowan, Dennis S. Mileti, Morgan P. Moschetti, David Ozman, Elizabeth Pastor, Mark D. Petersen, Keith A. Porter, David W. Ramsey, Liesel A. Ritchie, Jessica K. Fitzpatrick, Kenneth S. Rukstales, Timothy L. Sellnow, Wendy L. Vaughon, David J. Wald, Lisa A. Wald, Anne Wein, Christina Zarcadoolas
Play-level distributions of estimates of recovery factors for a miscible carbon dioxide enhanced oil recovery method used in oil reservoirs in the conterminous United States Play-level distributions of estimates of recovery factors for a miscible carbon dioxide enhanced oil recovery method used in oil reservoirs in the conterminous United States
In a U.S. Geological Survey (USGS) study, recovery-factor estimates were calculated by using a publicly available reservoir simulator (CO2 Prophet) to estimate how much oil might be recovered with the application of a miscible carbon dioxide (CO2) enhanced oil recovery (EOR) method to technically screened oil reservoirs located in onshore and State offshore areas in the conterminous...
Authors
Emil Attanasi, P.A. Freeman
Groundwater, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona—2012–2013 Groundwater, surface-water, and water-chemistry data, Black Mesa area, northeastern Arizona—2012–2013
The Navajo (N) aquifer is an extensive aquifer and the primary source of groundwater in the 5,400-square-mile Black Mesa area in northeastern Arizona. Availability of water is an important issue in northeastern Arizona because of continued water requirements for industrial and municipal use by a growing population and because of low precipitation in the arid climate of the Black Mesa...
Authors
Jamie P. Macy, Margot Truini
Application of hydrogeology and groundwater-age estimates to assess the travel time of groundwater at the site of a landfill to the Mahomet Aquifer, near Clinton, Illinois Application of hydrogeology and groundwater-age estimates to assess the travel time of groundwater at the site of a landfill to the Mahomet Aquifer, near Clinton, Illinois
The U.S. Geological Survey used interpretations of hydrogeologic conditions and tritium-based groundwater age estimates to assess the travel time of groundwater at a landfill site near Clinton, Illinois (the “Clinton site”) where a chemical waste unit (CWU) was proposed to be within the Clinton landfill unit #3 (CLU#3). Glacial deposits beneath the CWU consist predominantly of low...
Authors
Robert T. Kay, Paul M. Buszka
Cooperative Fish and Wildlife Research Units Program—2015 Year In Review Cooperative Fish and Wildlife Research Units Program—2015 Year In Review
Authors
John F. Organ, John Thompson, Don E. Dennerline, Dawn Childs
High-resolution gravity and seismic-refraction surveys of the Smoke Tree Wash area, Joshua Tree National Park, California High-resolution gravity and seismic-refraction surveys of the Smoke Tree Wash area, Joshua Tree National Park, California
We describe high-resolution gravity and seismic refraction surveys acquired to determine the thickness of valley-fill deposits and to delineate geologic structures that might influence groundwater flow beneath the Smoke Tree Wash area in Joshua Tree National Park. These surveys identified a sedimentary basin that is fault-controlled. A profile across the Smoke Tree Wash fault zone...
Authors
Victoria E. Langenheim, Michael J. Rymer, Rufus D. Catchings, Mark R. Goldman, Janet Watt, Robert E. Powell, Jonathan C. Matti
Desert tortoise annotated bibliography, 1991-2015 Desert tortoise annotated bibliography, 1991-2015
Authors
Kristin H. Berry, Lisa M. Lyren, Jeremy S. Mack, L. Arriana Brand, Dustin A. Wood
Predictive mapping of seabirds, pinnipeds and cetaceans off the Pacific Coast of Washington Predictive mapping of seabirds, pinnipeds and cetaceans off the Pacific Coast of Washington
Authors
Charles Menza, Jeffery B. Leirness, Tim White, Arliss Winship, Brian P. Kinlan, Laura Kracker, Jeannette E. Zamon, Lisa Ballance, Elizabeth Becker, Karin A. Forney, Jay Barlow, Josh Adams, David Pereksta, Scott Pearson, John Pierce, Steven J. Jeffries, John Calambokidis, Annie Douglas, Bradford C. Hanson, Scott R. Benson, Liam Antrim
Riparian groundwater and baseflow studies in the Upper Colorado River Basin Riparian groundwater and baseflow studies in the Upper Colorado River Basin
Authors
Lindsay Reynolds, Patrick B. Shafroth
Capsule- and disk-filter procedure Capsule- and disk-filter procedure
Capsule and disk filters are disposable, self-contained units composed of a pleated or woven filter medium encased in a polypropylene or other plastic housing that can be connected inline to a sample-delivery system (such as a submersible or peristaltic pump) that generates sufficient pressure (positive or negative) to force water through the filter. Filter media are available in several...
Authors
Stanley C. Skrobialowski
Groundwater conditions in Utah, spring of 2016 Groundwater conditions in Utah, spring of 2016
This is the fifty-third in a series of annual reports that describe groundwater conditions in Utah. Reports in this series, published cooperatively by the U.S. Geological Survey and the Utah Department of Natural Resources, Division of Water Rights, and the Utah Department of Environmental Quality, Division of Water Quality, provide data to enable interested parties to maintain awareness...
Authors
Carole B. Burden