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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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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
Overview and progress of the pallid sturgeon assessment framework redesign process Overview and progress of the pallid sturgeon assessment framework redesign process
The Pallid Sturgeon Population Assessment Program (PSPAP) was initiated in 2003, and full implementation began in 2006, to monitor the trend of Scaphirhynchus albus (pallid sturgeon) and native fish communities in the Upper and Lower Missouri River Basins. The original PSPAP (v. 1.0) was a catch-effort based monitoring program where population abundance and trend were monitored using a...
Authors
Michael E. Colvin, Sara Reynolds, Robert B. Jacobson, Landon L. Pierce, Kirk D. Steffensen, Timothy L. Welker
Monitoring framework for evaluating hydrogeomorphic and vegetation responses to environmental flows in the Middle Fork Willamette, McKenzie, and Santiam River Basins, Oregon Monitoring framework for evaluating hydrogeomorphic and vegetation responses to environmental flows in the Middle Fork Willamette, McKenzie, and Santiam River Basins, Oregon
This report summarizes a framework for monitoring hydrogeomorphic and vegetation responses to environmental flows in support of the Willamette Sustainable Rivers Program (SRP). The SRP is a partnership between The Nature Conservancy (TNC) and U.S. Army Corps of Engineers (USACE) to provide ecologically sustainable flows downstream of dams while still meeting human needs and...
Authors
J. Rose Wallick, Leslie B. Bach, Mackenzie K. Keith, Melissa Olson, Joseph F. Mangano, Krista L. Jones
Deep aquifer recharge in the Columbia River Basalt Group, upper Umatilla River Basin, northeastern Oregon Deep aquifer recharge in the Columbia River Basalt Group, upper Umatilla River Basin, northeastern Oregon
Groundwater is an important component of the water resources of the upper Umatilla River Basin of northeastern Oregon. As such, understanding the capacity of the resource is vital. Past studies have estimated recharge in the study area. One recent study of the upper Umatilla River Basin indicated that about 80 percent of recharge entering the groundwater system is discharged to streams...
Authors
Esther M. Pischel, Henry M. Johnson, Stephen B. Gingerich
Land-cover changes associated with oil and natural-gas production and concentrations of selected constituents in surface-water and streambed-sediment samples collected upstream from and within an area of oil and natural-gas production, south Texas, 2008–1 Land-cover changes associated with oil and natural-gas production and concentrations of selected constituents in surface-water and streambed-sediment samples collected upstream from and within an area of oil and natural-gas production, south Texas, 2008–1
The extensive development of oil and natural-gas resources in south Texas during the past 10 years has led to questions regarding possible environmental effects of processes associated with oil and natural-gas production, in particular the process of hydraulic fracturing, on water and other natural resources. Part of the lower San Antonio River watershed intersects an area of oil and...
Authors
Cassi L. Crow, Stephen P. Opsahl, Diana E. Pedraza, Emily C. Pease, Ross K. Kushnereit
Hydrology and hydrodynamics on the Sacramento River near the Fremont Weir, California—Implications for juvenile salmon entrainment estimates Hydrology and hydrodynamics on the Sacramento River near the Fremont Weir, California—Implications for juvenile salmon entrainment estimates
Estimates of fish entrainment on the Sacramento River near the Fremont Weir are a critical component in determining the feasibility and design of a proposed notch in the weir to increase access to the Yolo Bypass, a seasonal floodplain of the Sacramento River. Detailed hydrodynamic and velocity measurements were made at a river bend near the Fremont Weir in the winter and spring of 2016...
Authors
Paul R. Stumpner, Aaron R. Blake, Jon R. Burau
Assessment of managed aquifer recharge at Sand Hollow Reservoir, Washington County, Utah, updated to conditions through 2016 Assessment of managed aquifer recharge at Sand Hollow Reservoir, Washington County, Utah, updated to conditions through 2016
Sand Hollow Reservoir in Washington County, Utah, was completed in March 2002 and is operated primarily for managed aquifer recharge by the Washington County Water Conservancy District. From 2002 through 2016, surface-water diversions of about 256,000 acre-feet (acre-ft) to Sand Hollow Reservoir have allowed the reservoir to remain nearly full since 2006. Groundwater levels in monitoring...
Authors
Thomas M. Marston, Nora C. Nelson
Adaptive management in native grasslands managed by the U.S. Fish and Wildlife Service—Implications for grassland birds Adaptive management in native grasslands managed by the U.S. Fish and Wildlife Service—Implications for grassland birds
Burning and grazing are natural processes in native prairies that also serve as important tools in grassland management to conserve plant diversity, to limit encroachment of woody and invasive plants, and to maintain or improve prairies. Native prairies managed by the U.S. Fish and Wildlife Service (FWS) in the Prairie Pothole Region of the northern Great Plains have been extensively...
Authors
Lawrence D. Igl, Wesley E. Newton, Todd A. Grant, Cami S. Dixon
Application of the Stream Salmonid Simulator (S3) to the restoration reach of the Trinity River, California—Parameterization and calibration Application of the Stream Salmonid Simulator (S3) to the restoration reach of the Trinity River, California—Parameterization and calibration
Executive Summary In this report, we constructed and parameterized the Stream Salmonid Simulator (S3) for the 64-kilometer “Restoration Reach” of the Trinity River, just downstream of Lewiston Dam in northern California. S3 is a deterministic life-stage-structured population model that tracks daily growth, movement, and survival of juvenile salmon. A key theme of the model is that river...
Authors
Russell W. Perry, Edward C. Jones, John M. Plumb, Nicholas A. Som, Nicholas J. Hetrick, Thomas B. Hardy, Joseph C Polos, Aaron C. Martin, Justin S. Alvarez, Kyle P. De Juilio