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: 84897
USGS lidar science strategy—Mapping the technology to the science USGS lidar science strategy—Mapping the technology to the science
Summary The U.S. Geological Survey (USGS) utilizes light detection and ranging (lidar) and enabling technologies to support many science research activities. Lidar-derived metrics and products have become a fundamental input to complex hydrologic and hydraulic models, flood inundation models, fault detection and geologic mapping, topographic and land-surface mapping, landslide and...
Authors
Jason M. Stoker, John Brock, Christopher E. Soulard, Kernell G. Ries, Larry J. Sugarbaker, Wesley E. Newton, Patricia K. Haggerty, Kathy Lee, John A. Young
Determination of pesticides and pesticide degradates in filtered water by direct aqueous-injection liquid chromatography-tandem mass spectrometry Determination of pesticides and pesticide degradates in filtered water by direct aqueous-injection liquid chromatography-tandem mass spectrometry
A liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for determination of 229 pesticides compounds (113 pesticides and 116 pesticide degradates) in filtered water samples from stream and groundwater sites. The pesticides represent a broad range of chemical classes and were selected based on criteria such as current-use intensity, probability of occurrence in...
Authors
Mark W. Sandstrom, Leslie K. Kanagy, Cyrissa A. Anderson, Christopher J. Kanagy
Assessment of undiscovered continuous gas resources of the Ordos Basin Province, China, 2015 Assessment of undiscovered continuous gas resources of the Ordos Basin Province, China, 2015
Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean resources of 28 trillion cubic feet of tight gas and 5.6 trillion cubic feet of coalbed gas in upper Paleozoic rocks in the Ordos Basin Province, China.
Authors
Ronald R. Charpentier, Timothy R. Klett, Christopher J. Schenk, Michael E. Brownfield, Stephanie B. Gaswirth, Phuong A. Le, Heidi M. Leathers-Miller, Kristen R. Marra, Tracey J. Mercier
Response of periphyton fatty acid composition to supplemental flows in the upper Esopus Creek, Catskill Mountains, New York Response of periphyton fatty acid composition to supplemental flows in the upper Esopus Creek, Catskill Mountains, New York
Fatty acid analysis of periphyton is an emerging tool for assessing the condition of a stream ecosystem on the basis of its water quality. The study presented in this report was designed to test the hypothesis that periphyton communities have a fatty acid profile that can detect excessive turbidity and suspended sediment. The fatty acid composition of periphyton was assessed during two...
Authors
Scott D. George, Anne G. Ernst, Barry P. Baldigo, Dale C. Honeyfield
Evaluation of the 8310-N-S manufactured by Sutron–Results of bench, temperature, and field deployment testing Evaluation of the 8310-N-S manufactured by Sutron–Results of bench, temperature, and field deployment testing
The Sutron 8310-N-S (8310) data collection platform (DCP) manufactured by Sutron Corporation was evaluated by the U.S. Geological Survey (USGS) Hydrologic Instrumentation Facility (HIF) for conformance to the manufacturer’s specifications for recording and transmitting data. The 8310-N-S is a National Electrical Manufacturers Association (NEMA)-enclosed DCP with a built-in Geostationary
Authors
Gerald A. Kunkle
The Aleutian-Bering Climate Vulnerability Assessment The Aleutian-Bering Climate Vulnerability Assessment
Recent efforts to develop downscaled climate projections for the Bering Sea and Aleutians created an opportunity to better assess regional vulnerability to climate change. The Aleutian Bering Climate Vulnerability Assessment (ABCVA) was launched in 2014 to bring together regional science expertise and stakeholder interests in a rapid evaluation of the implications of future climate...
Management-driven science synthesis: An evaluation of Everglades restoration trajectories Management-driven science synthesis: An evaluation of Everglades restoration trajectories
The Synthesis of Everglades Restoration andEcosystem Services (SERES) Project was funded in 2010 by the U.S. Department of Interior (DOI) through the Critical Ecosystem Studies Initiative (CESI) and established to synthesize the ever-growing body of Everglades scientific information with the goal of addressing topics that have hampered restoration since the Comprehensive Everglades...
Authors
Stephen E Davis, James M. Beerens, Rena R. Borkhataria, Daniel L. Childers, Jay Choi, Steven M Davis, Carl Fitz, Evelyn Gaiser, Hiram Henriquez, Thomas E. Lodge, Judson Harvey, Frank Marshall, Bobby McCormick, Melodie Naja, Todd Osborne, Michael S. Ross, Jay Sah, Joel C. Trexler, Thomas Van Lent, Paul R. Wetzel
Streamflow Streamflow
This indicator describes trends in the amount of water carried by streams across the United States, as well as the timing of runoff associated with snowmelt.
Authors
Michael McHale, Robert W. Dudley, Glenn A. Hodgkins
Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2015 Yellowstone grizzly bear investigations — Annual report of the Interagency Grizzly Bear Study Team 2015
This Annual Report summarizes results of grizzly bear (Ursus arctos) monitoring and research conducted in the Greater Yellowstone Ecosystem (GYE) by the Interagency Grizzly Bear Study Team (IGBST) during 2015. The report also contains a summary of grizzly bear management actions to address conflict situations.
Tamarisk beetle (Diorhabda spp.) in the Colorado River basin: Synthesis of an expert panel forum Tamarisk beetle (Diorhabda spp.) in the Colorado River basin: Synthesis of an expert panel forum
Executive Summary In 2001, the U.S. Department of Agriculture approved the release of a biological control agent, the tamarisk beetle (Diorhabda spp.), to naturally control tamarisk populations and provide a less costly, and potentially more effective, means of removal compared with mechanical and chemical methods. The invasive plant tamarisk (Tamarix spp.; saltcedar) occupies hundreds...
Authors
Benjamin R. Bloodworth, Patrick B. Shafroth, Anna A. Sher, Rebecca B. Manners, Daniel W. Bean, Matthew J. Johnson, Osvel Hinojosa-Huerta
Sharing our data—An overview of current (2016) USGS policies and practices for publishing data on ScienceBase and an example interactive mapping application Sharing our data—An overview of current (2016) USGS policies and practices for publishing data on ScienceBase and an example interactive mapping application
This report provides an overview of current (2016) U.S. Geological Survey policies and practices related to publishing data on ScienceBase, and an example interactive mapping application to display those data. ScienceBase is an integrated data sharing platform managed by the U.S. Geological Survey. This report describes resources that U.S. Geological Survey Scientists can use for writing...
Authors
Katherine J. Chase, Andrew R. Bock, Roy Sando
2015 status of the Lake Ontario lower trophic levels 2015 status of the Lake Ontario lower trophic levels
Offshore spring total phosphorus (TP) in 2015 was 4.2 μ g/L, the same as in 2014; this is lower than 2001 - 2013, but there is no significant time trend 2001 - 2015. Offshore soluble reactive phosphorus (SRP) was very low in 2015; Apr/May - Oct mean values were
Authors
Kristen T. Holeck, Lars G. Rudstam, Christopher Hotaling, Russ D. McCullough, Dave Lemon, Web Pearsall, Jana Lantry, Michael J. Connerton, Steve LaPan, Zy Biesinger, Brian F. Lantry, Maureen Walsh, Brian Weidel