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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.
Filter Total Items: 85088
Greater sage-grouse science (2015–17)—Synthesis and potential management implications Greater sage-grouse science (2015–17)—Synthesis and potential management implications
Authors
Steven E. Hanser, Patricia A. Deibert, John C. Tull, Natasha B. Carr, Cameron L. Aldridge, Travis D. Bargsten, Thomas J. Christiansen, Peter S. Coates, Michele R. Crist, Kevin E. Doherty, Ethan A. Ellsworth, Lee J. Foster, Vicki A. Herren, Kevin H. Miller, Ann Moser, Robin M. Naeve, Karen L. Prentice, Thomas E. Remington, Mark A. Ricca, Douglas J. Shinneman, Richard L. Truex, Lief A. Wiechman, Dereck C. Wilson, Zachary H. Bowen
Stream-channel and watershed delineations and basin-characteristic measurements using lidar elevation data for small drainage basins within the Des Moines Lobe landform region in Iowa Stream-channel and watershed delineations and basin-characteristic measurements using lidar elevation data for small drainage basins within the Des Moines Lobe landform region in Iowa
Basin-characteristic measurements related to stream length, stream slope, stream density, and stream order have been identified as significant variables for estimation of flood, flow-duration, and low-flow discharges in Iowa. The placement of channel initiation points, however, has always been a matter of individual interpretation, leading to differences in stream definitions between...
Authors
David A. Eash, Kimberlee K. Barnes, Padraic S. O’Shea, Brian K. Gelder
Postglacial eruptive history and geochemistry of Semisopochnoi volcano, western Aleutian Islands, Alaska Postglacial eruptive history and geochemistry of Semisopochnoi volcano, western Aleutian Islands, Alaska
Semisopochnoi Island, located in the Rat Islands group of the western Aleutian Islands and Aleutian volcanic arc, is a roughly circular island composed of scattered volcanic vents, the prominent caldera of Semisopochnoi volcano, and older, ancestral volcanic rocks. The oldest rocks on the island are gently radially dipping lavas that are the remnants of a shield volcano and of Ragged Top...
Authors
Michelle L. Coombs, Jessica F. Larsen, Christina A. Neal
Assessment of undiscovered continuous oil and gas resources in the Hanoi Trough, Vietnam, 2017 Assessment of undiscovered continuous oil and gas resources in the Hanoi Trough, Vietnam, 2017
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable continuous resources of 52 million barrels of oil and 591 billion cubic feet of gas in the Hanoi Trough of Vietnam.
Authors
Christopher J. Schenk, Marilyn E. Tennyson, Tracey J. Mercier, Cheryl A. Woodall, Phuong A. Le, Timothy R. Klett, Thomas M. Finn, Heidi M. Leathers-Miller, Stephanie B. Gaswirth, Kristen R. Marra
Preliminary flood-duration frequency estimates using naturalized streamflow records for the Willamette River Basin, Oregon Preliminary flood-duration frequency estimates using naturalized streamflow records for the Willamette River Basin, Oregon
In this study, “naturalized” daily streamflow records, created by the U.S. Army Corps of Engineers and the Bureau of Reclamation, were used to compute 1-, 3-, 7-, 10-, 15-, 30-, and 60-day annual maximum streamflow durations, which are running averages of daily streamflow for the number of days in each duration. Once the annual maximum durations were computed, the floodduration...
Authors
Greg D. Lind, Adam J. Stonewall
Water pressure and ground vibrations induced by water guns near Brandon Road Lock and Dam and Lemont, Illinois Water pressure and ground vibrations induced by water guns near Brandon Road Lock and Dam and Lemont, Illinois
Multiple geophysical sensors were used to characterize the underwater pressure field and ground vibrations of a seismic water gun and its suitability to deter the movement of Asian carps (particularly the silver [Hypophthalmichthys molitrix] and bighead [Hypophthalmichthys nobilis] carps) while ensuring the integrity of surrounding structures. The sensors used to collect this information...
Authors
Ryan F. Adams, Carolyn M. Koebel, William S. Morrow
Assessment of undiscovered oil and gas resources in the North-Central Montana Province, 2017 Assessment of undiscovered oil and gas resources in the North-Central Montana Province, 2017
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable resources of 55 million barrels of oil and 846 billion cubic feet of gas in the North-Central Montana Province.
Authors
Christopher J. Schenk, Tracey J. Mercier, Michael E. Brownfield, Marilyn E. Tennyson, Cheryl A. Woodall, Phuong A. Le, Timothy R. Klett, Stephanie B. Gaswirth, Thomas M. Finn, Janet K. Pitman, Kristen R. Marra, Heidi M. Leathers-Miller
Results of the 2010-2011 East-Central Adirondack Stream Survey (ECASS) Results of the 2010-2011 East-Central Adirondack Stream Survey (ECASS)
No abstract available.
Authors
Gregory B. Lawrence, Scott D. George, Douglas A. Burns, Barry P. Baldigo, Sophia Passy, Karen M. Roy, Katrina L. Pound
Distribution of effluent injected into the Boulder Zone of the Floridan aquifer system at the North District Wastewater Treatment Plant, southeastern Florida, 1997–2011 Distribution of effluent injected into the Boulder Zone of the Floridan aquifer system at the North District Wastewater Treatment Plant, southeastern Florida, 1997–2011
Nonhazardous, secondarily treated, domestic wastewater (effluent) has been injected about 1 kilometer below land surface into the Boulder Zone of the Floridan aquifer system at the North District Wastewater Treatment Plant in southeastern Florida. The Boulder Zone contains saline, nonpotable water. Effluent transport out of the injection zone is a risk of underground effluent injection...
Authors
Jeffrey N. King, Jeremy D. Decker
Cooperative Fish and Wildlife Research Units Program—2017 year in review Cooperative Fish and Wildlife Research Units Program—2017 year in review
The Cooperative Fish and Wildlife Research Units Program was involved in a number of notable events during 2017, many concerning our personnel. Dr. Barry Grand left his position as Leader of the Alabama Cooperative Fish and Wildlife Research Unit to become the Cooperative Units Program Supervisor for the South, replacing Dr. Kevin Whalen who took over as Supervisor for the West. We...
Authors
John F. Organ, John D. Thompson, Donald E. Dennerline, Dawn E. Childs
Cooperative Fish and Wildlife Research Units Program—2017 year in review postcard Cooperative Fish and Wildlife Research Units Program—2017 year in review postcard
This postcard provides details about the Cooperative Fish and Wildlife Research Units Program—2017 Year in Review, U.S. Geological Survey Circular 1438, now available at https://doi.org/10.3133/cir1438. In this report, you will find details about the Cooperative Fish and Wildlife Research Units (CRU) Program relating to its background, fish and wildlife science, students, staffing...
Authors
John F. Organ, John D. Thompson, Donald E. Dennerline, Dawn E. Childs
Assessment of undiscovered continuous oil and gas resources in the Bohaiwan Basin Province, China, 2017 Assessment of undiscovered continuous oil and gas resources in the Bohaiwan Basin Province, China, 2017
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable continuous resources of 2.0 billion barrels of oil and 20.3 trillion cubic feet of gas in the Bohaiwan Basin Province, China.
Authors
Christopher J. Schenk, Marilyn E. Tennyson, Tracey J. Mercier, Cheryl A. Woodall, Thomas M. Finn, Michael E. Brownfield, Phuong A. Le, Timothy R. Klett, Stephanie B. Gaswirth, Kristen R. Marra, Heidi M. Leathers-Miller, Christopher J. Potter