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.
Filter Total Items: 85089
Survey of bats on Columbia National Wildlife Refuge, Washington, December 2011-April 2012 Survey of bats on Columbia National Wildlife Refuge, Washington, December 2011-April 2012
Bats are diverse and abundant in many ecosystems worldwide. They perform important ecosystem functions, particularly by consuming large quantities of insects (Cleveland and others, 2006; Jones and others, 2009; Kuhn and others, 2011). The importance of bats to biodiversity and to ecosystem integrity has been overlooked in many regions, largely because the challenges of detecting and...
Authors
Joan C. Hagar, Tom Manning, Jenny Barnett
Suspended-sediment loads and reservoir sediment trap efficiency for Clinton Lake, Kansas, 2010-12 Suspended-sediment loads and reservoir sediment trap efficiency for Clinton Lake, Kansas, 2010-12
Continuous streamflow and turbidity data collected from October 1, 2010, to September 30, 2012, at a site upstream and downstream from Clinton Lake, Kansas, were used to compute the total suspended-sediment load delivered to and released from the reservoir as well as the sediment trap efficiency for the reservoir. Ongoing sedimentation is inhibiting the ability of Clinton Lake to serve...
Authors
Kyle E. Juracek
Synthesis and interpretation of surface-water quality and aquatic biota data collected in Shenandoah National Park, Virginia, 1979-2009 Synthesis and interpretation of surface-water quality and aquatic biota data collected in Shenandoah National Park, Virginia, 1979-2009
Shenandoah National Park in northern and central Virginia protects 777 square kilometers of mountain terrain in the Blue Ridge physiographic province and more than 90 streams containing diverse aquatic biota. Park managers and visitors are interested in the water quality of park streams and its ability to support healthy coldwater communities and species, such as the native brook trout...
Authors
John D. Jastram, Craig D. Snyder, Nathaniel P. Hitt, Karen C. Rice
Table of standard atomic weights 2013 Table of standard atomic weights 2013
IUPAC Commission on Istopic Abundances and Atomic Weights' spreadsheet of Standard Atomic Weights.
Authors
Tyler B. Coplen, Willi A. Brand, Juris Meija, Manfred Gröning, Norman E. Holden, Michael Berglund, Paul De Bievre, Robert D. Loss, Thomas Prohaska, Thomas Walczyk
Tabular data and graphical images in support of the U.S. Geological Survey National Oil and Gas Assessment--San Juan Basin Province (5022): Chapter 7 in Total petroleum systems and geologic assessment of undiscovered oil and gas resources in the San Ju Tabular data and graphical images in support of the U.S. Geological Survey National Oil and Gas Assessment--San Juan Basin Province (5022): Chapter 7 in Total petroleum systems and geologic assessment of undiscovered oil and gas resources in the San Ju
This chapter describes data used in support of the process being applied by the U.S. Geological Survey (USGS) National Oil and Gas Assessment (NOGA) project. Digital tabular data used in this report and archival data that permit the user to perform further analyses are available elsewhere on this CD–ROM. Computers and software may import the data without transcription from the Portable...
Authors
T. R. Klett, P. A. Le
Tallgrass prairie restoration: seeding for success Tallgrass prairie restoration: seeding for success
Tallgrass prairie is one of the most imperiled ecosystems on Earth. A 2004 estimate indicated that only 2.4 percent of the original northern tallgrass prairie remained in the United States. If tallgrass prairie and the species dependent on it are to survive, management must include restoration of cropland and degraded prairies, in addition to preservation of the few remaining fragments...
Authors
Diane L. Larson
Technical evaluation of a total maximum daily load model for Upper Klamath and Agency Lakes, Oregon Technical evaluation of a total maximum daily load model for Upper Klamath and Agency Lakes, Oregon
We reviewed a mass balance model developed in 2001 that guided establishment of the phosphorus total maximum daily load (TMDL) for Upper Klamath and Agency Lakes, Oregon. The purpose of the review was to evaluate the strengths and weaknesses of the model and to determine whether improvements could be made using information derived from studies since the model was first developed. The new...
Authors
Tamara M. Wood, Susan A. Wherry, James L. Carter, James S. Kuwabara, Nancy S. Simon, Stewart A. Rounds
Terrestrial ecosystems: national inventory of vegetation and land use Terrestrial ecosystems: national inventory of vegetation and land use
The Gap Analysis Project (GAP)/Landscape Fire and Resource Management Planning Tools (LANDFIRE) National Terrestrial Ecosystems Data represents detailed data on the vegetation and land-use patterns of the United States, including Alaska, Hawaii, and Puerto Rico. This national dataset combines detailed land cover data generated by the GAP with LANDFIRE data (http://www.landfire.gov/)...
Authors
Kevin J. Gergely, Alexa McKerrow
The 3D Elevation Program: summary for Alabama The 3D Elevation Program: summary for Alabama
Elevation data are essential to a broad range of applications, including forest resources management, wildlife and habitat management, national security, recreation, and many others. For the State of Alabama, elevation data are critical for flood risk management; infrastructure and construction management; wildfire management, planning, and response; natural resources conservation...
Authors
William J. Carswell
The 3D Elevation Program: summary for Alaska The 3D Elevation Program: summary for Alaska
Elevation data are essential to a broad range of applications, including forest resources management, wildlife and habitat management, national security, recreation, and many others. For the State of Alaska, elevation data are critical for aviation navigation and safety, natural resources conservation, oil and gas resources, flood risk management, geologic resource assessment and hazards
Authors
William J. Carswell
The 3D Elevation Program: summary for California The 3D Elevation Program: summary for California
Elevation data are essential to a broad range of applications, including forest resources management, wildlife and habitat management, national security, recreation, and many others. For the State of California, elevation data are critical for infrastructure and construction management; natural resources conservation; flood risk management; wildfire management, planning, and response...
Authors
William J. Carswell
The 3D Elevation Program: summary for Colorado The 3D Elevation Program: summary for Colorado
Elevation data are essential to a broad range of applications, including forest resources management, wildlife and habitat management, national security, recreation, and many others. For the State of Colorado, elevation data are critical for natural resources conservation, agriculture and precision farming, infrastructure and construction management, flood risk management, geologic...
Authors
William J. Carswell