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: 84793
U.S. Caribbean U.S. Caribbean
Historically, the U.S. Caribbean region has experienced relatively stable seasonal rainfall patterns, moderate annual temperature fluctuations, and a variety of extreme weather events, such as tropical storms, hurricanes, and drought. However, the Caribbean climate is changing and is projected to be increasingly variable as levels of greenhouse gases in the atmosphere increase. The high...
Authors
William A. Gould, Ernesto L. Diaz, Nora L. Alvarez-Berrios, Felix Aponte-Gonzalez, Wayne Archibald, Jared H. Bowden, Lisamarie Carrubba, Wanda Crespo, Stephen J. Fain, Grizelle Gonzalez, Annmarie Goulbourne, Eric Harmsen, Eva Holupchinski, Azad H. Khalyani, James P. Kossin, Amanda J. Leinberger, Vanessa I. Marrero-Santiago, Odalys Martinez-Sanchez, Kathleen McGinley, Pablo Mendez-Lazaro, Julio Morrell, Melissa Melendez Oyola, Isabel K. Pares-Ramos, Roger Pulwarty, William V. Sweet, Adam J. Terando, Sigfredo Torres-González
Water Water
Ensuring a reliable supply of clean freshwater to individuals, communities, and ecosystems, together with effective management of floods and droughts, is the foundation of human and ecological health. The water sector is also central to the economy and contributes significantly to the resilience of many other sectors, including agriculture, energy, urban environments, and industry. Water...
Authors
Upmanu Lall, Thomas M. Johnson, Peter Colohan, Amir AghaKouchak, Casey L. Brown, Gregory J. McCabe, Roger Pulwarty, Sankar Arumugam
Water use in Louisiana, 2015 Water use in Louisiana, 2015
In 2015, approximately 8,720 million gallons per day (Mgal/d) of water was withdrawn from groundwater and surface-water sources in Louisiana, a 2.6 percent increase from 2010. Total groundwater withdrawals were about 1,750 Mgal/d, an increase of 12 percent from 2010, and total surface-water withdrawals were about 6,970 Mgal/d, an increase of 0.44 percent from 2010 to 2015. Total water...
Authors
Angela L. Robinson, B. Pierre Sargent
The role of sand lance in the Northwest Atlantic ecosystem The role of sand lance in the Northwest Atlantic ecosystem
No abstract available.
Authors
Michelle Staudinger, Linda Welch, Dave Wiley
Yellowstone River compact commission sixty-sixth annual report 2017 Yellowstone River compact commission sixty-sixth annual report 2017
No abstract available.
Authors
John M. Kilpatrick, Patrick Tyrrell, Jan Langel
Soil acidification and Beech Bark Disease influence the composition and structure of Sugar Maple-Beech Forests Soil acidification and Beech Bark Disease influence the composition and structure of Sugar Maple-Beech Forests
No abstract available.
Authors
Timothy J. Sullivan, Todd C. McDonnell, Gregory B. Lawrence, Michael R. Antidormi, Martin Dovciak, Michael R. Zarfos, Scott W. Bailey
Groundwater-flow budget for the lower Apalachicola-Chattahoochee-Flint River Basin in southwestern Georgia and parts of Florida and Alabama, 2008–12 Groundwater-flow budget for the lower Apalachicola-Chattahoochee-Flint River Basin in southwestern Georgia and parts of Florida and Alabama, 2008–12
As part of the National Water Census program in the Apalachicola-Chattahoochee-Flint (ACF) River Basin, the U.S. Geological Survey evaluated the groundwater budget of the lower ACF, with particular emphasis on recharge, characterizing the spatial and temporal relation between surface water and groundwater, and groundwater pumping. To evaluate the hydrologic budget of the lower ACF River...
Authors
L. Elliott Jones, Jaime A. Painter, Jacob H. LaFontaine, Nicasio Sepulveda, Dorothy F. Sifuentes
Simulations of hydrologic response in the Apalachicola-Chattahoochee-Flint River Basin, Southeastern United States Simulations of hydrologic response in the Apalachicola-Chattahoochee-Flint River Basin, Southeastern United States
A suite of hydrologic models has been developed for the Apalachicola-Chattahoochee-Flint River Basin (ACFB) as part of the National Water Census, a U.S. Geological Survey research program that focuses on developing new water accounting tools and assessing water availability and use at the regional and national scales. Seven hydrologic models were developed using the Precipitation-Runoff...
Authors
Jacob H. LaFontaine, L. Elliott Jones, Jaime A. Painter
Baseline assessment of groundwater quality in Pike County, Pennsylvania, 2015 Baseline assessment of groundwater quality in Pike County, Pennsylvania, 2015
The Devonian-age Marcellus Shale and the Ordovician-age Utica Shale, which have the potential for natural gas development, underlie Pike County and neighboring counties in northeastern Pennsylvania. In 2015, the U.S. Geological Survey, in cooperation with the Pike County Conservation District, conducted a study that expanded on a previous more limited 2012 study to assess baseline...
Authors
Lisa A. Senior, Charles A. Cravotta
Chemical quality of water and bottom sediment, Stillwater National Wildlife Refuge, Lahontan Valley, Nevada Chemical quality of water and bottom sediment, Stillwater National Wildlife Refuge, Lahontan Valley, Nevada
The U.S. Geological Survey, in cooperation with the U.S. Fish and Wildlife Service collected data on water and bottom-sediment chemistry to be used to evaluate a new water rights acquisition program designed to enhance wetland habitat in Stillwater National Wildlife Refuge and in Lahontan Valley, Churchill County, Nevada. The area supports habitat critical to the feeding and resting of...
Authors
Carl E. Thodal
Streambed scour evaluations and conditions at selected bridge sites in Alaska, 2013–15 Streambed scour evaluations and conditions at selected bridge sites in Alaska, 2013–15
Streambed scour potential was evaluated at 52 river- and stream-spanning bridges in Alaska that lack a quantitative scour analysis or have unknown foundation details. All sites were evaluated for stream stability and long-term scour potential. Contraction scour and abutment scour were calculated for 52 bridges, and pier scour was calculated for 11 bridges that had piers. Vertical...
Authors
Robin A. Beebee, Karenth L. Dworsky, Schyler J. Knopp
An evaluation of the zooplankton community at the Sheboygan River Area of Concern and non-Area of Concern comparison sites in western Lake Michigan rivers and harbors in 2016 An evaluation of the zooplankton community at the Sheboygan River Area of Concern and non-Area of Concern comparison sites in western Lake Michigan rivers and harbors in 2016
The Great Lakes Areas of Concern (AOCs) are considered to be the most severely degraded areas within the Great Lakes basin, as defined in the Great Lakes Water Quality Agreement and amendments. Among the 43 designated AOCs are four Lake Michigan AOCs in the State of Wisconsin. The smallest of these AOCs is the Sheboygan River AOC, which was designated as an AOC because of sediment...
Authors
Hayley T. Olds, Barbara C. Scudder Eikenberry, Daniel J. Burns, Amanda H. Bell