Introduction and summary of findings
Kent Turner, Michael R. Rosen, Steven L. Goodbred, Jennell M. Miller
2012, Circular 1381-1
Lakes Mead and Mohave, which are the centerpieces of Lake Mead National Recreation Area (LMNRA), provide many significant benefits that have made the modern development of the Southwestern United States possible. Lake Mead is the largest reservoir by volume in the nation and it supplies critical storage of water supplies...
Environmental setting of Lake Mead National Recreation Area: Chapter 2 in A synthesis of aquatic science for management of Lakes Mead and Mohave
Kent Turner, Michael R. Rosen, G. Chris Holdren, Steven L. Goodbred, David C. Twichell
2012, Circular 1381-2
Lakes Mead and Mohave provide opportunities for millions of regional, national, and international visitors to enjoy a wide array of water-based recreation in a spectacular desert setting. The national significance of the site’s recreational opportunities and scientific values led to its designation as the nation’s first National Recreation Area in...
Wildlife and biological resources: Chapter 5 in A synthesis of aquatic science for management of Lakes Mead and Mohave
Sudeep Chandra, Scott R. Abella, Brandon A. Albrecht, Joseph G. Barnes, E. Cayenne Engel, Steven L. Goodbred, Paul B. Holden, Ron B. Kegerries, Jef R. Jaeger, Erik Orsak, Michael R. Rosen, Jon Sjöberg, Wai Hing Wong
2012, Circular 1381-5
The creation of Lakes Mead and Mohave drastically changed habitats originally found along their region of the historical Colorado River. While still continuing to provide habitat conditions that support a rich diversity of species within the water, along shorelines, and in adjacent drainage areas, the reservoirs contain organisms that are...
Threats and stressors to the health of the ecosystems of Lakes Mead and Mohave: Chapter 6 in A synthesis of aquatic science for management of Lakes Mead and Mohave
Michael R. Rosen, Steven L. Goodbred, Wai Hing Wong, Reynaldo Patiño, Kent Turner, Craig J. Palmer, Peggy Roefer
2012, Circular 1381-6
Ecosystem impacts from visitor activities or natural environmental change are important concerns in all units of the National Park system. Possible impacts to aquatic ecosystems at Lake Mead National Recreation Area (LMNRA) are of particular concern because of the designation of Lakes Mead and Mohave as critical habitat for the...
Management implications of the science: Chapter 7 in A synthesis of aquatic science for management of Lakes Mead and Mohave
Kent Turner, Steven L. Goodbred, Michael R. Rosen, Jennell M. Miller
2012, Circular 1381-7
Lake Mead, particularly its Boulder Basin, is one of the most intensively monitored reservoirs in the United States. With its importance to societal needs and ecosystem benefits, interest in water quality and water resources of Lake Mead will remain high. A number of agencies have authorities and management interests in...
Lake water quality: Chapter 4 in A synthesis of aquatic science for management of Lakes Mead and Mohave
Todd Tietjen, G. Chris Holdren, Michael R. Rosen, Ronald J. Veley, Michael J. Moran, Brett Vanderford, Wai Hing Wong, Douglas D. Drury
2012, Circular 1381-4
Given the importance of the availability and quality of water in Lake Mead, it has become one of the most intensely sampled and studied bodies of water in the United States. As a result, data are available from sampling stations across the lake (fig. 4-1 and see U.S. Geological Survey...
Hydrology and management of Lakes Mead and Mohave within the Colorado River Basin: Chapter 3 in A synthesis of aquatic science for management of Lakes Mead and Mohave
G. Chris Holdren, Todd Tietjen, Kent Turner, Jennell M. Miller
2012, Circular 1381-3
The Colorado River Basin covers parts of seven States: Colorado, Wyoming, Utah, New Mexico, Nevada, Arizona, and California; at 1,450 mi (2,333.5 km) in length, the Colorado River is the seventh longest river in the United States (fig. 3-1). The Bureau of Reclamation has the responsibility for management of this...
Methods to characterize environmental settings of stream and groundwater sampling sites for National Water-Quality Assessment
Naomi Nakagaki, Kerie J. Hitt, Curtis V. Price, James A. Falcone
2012, Scientific Investigations Report 2012-5194
Characterization of natural and anthropogenic features that define the environmental settings of sampling sites for streams and groundwater, including drainage basins and groundwater study areas, is an essential component of water-quality and ecological investigations being conducted as part of the U.S. Geological Survey's National Water-Quality Assessment program. Quantitative characterization of...
Sampling history and 2009--2010 results for pesticides and inorganic constituents monitored by the Lake Wales Ridge Groundwater Network, central Florida
Anne F. Choquette, R. Scott Freiwald, Carol L. Kraft
2012, Open-File Report 2012-1231
The Lake Wales Ridge Monitoring (LWRM) Network was established to provide a long-term record of water quality of the surficial aquifer in one of the principal citrus-production areas of Florida. This region is underlain by sandy soils that contain minimal organic matter and are highly vulnerable to leaching of chemicals...
Low-flow frequency and flow duration of selected South Carolina streams in the Saluda, Congaree, and Edisto River basins through March 2009
Toby D. Feaster, Wladmir B. Guimaraes
2012, Open-File Report 2012-1253
Part of the mission of the South Carolina Department of Health and Environmental Control and the South Carolina Department of Natural Resources is to protect and preserve South Carolina's water resources. Doing so requires an ongoing understanding of streamflow characteristics of the rivers and streams in South Carolina. A particular...
Evaluation of quality-control data collected by the U.S. Geological Survey for routine water-quality activities at the Idaho National Laboratory, Idaho, 1996–2001
Gordon W. Rattray
2012, Scientific Investigations Report 2012-5270
The U.S. Geological Survey, in cooperation with the U.S. Department of Energy, collects surface water and groundwater samples at and near the Idaho National Laboratory as part of a routine, site-wide, water-quality monitoring program. Quality-control samples are collected as part of the program to ensure and document the quality of...
Comparison of two regression-based approaches for determining nutrient and sediment fluxes and trends in the Chesapeake Bay watershed
Douglas Moyer, Robert M. Hirsch, Kenneth Hyer
2012, Scientific Investigations Report 2012-5244
Nutrient and sediment fluxes and changes in fluxes over time are key indicators that water resource managers can use to assess the progress being made in improving the structure and function of the Chesapeake Bay ecosystem. The U.S. Geological Survey collects annual nutrient (nitrogen and phosphorus) and sediment flux data...
U.S. Geological Survey, National Wildlife Health Center, 2011 report of selected wildlife diseases
David E. Green, Megan Hines, Robin E. Russell, Jonathan M. Sleeman
2012, Scientific Investigations Report 2012-5271
The National Wildlife Health Center (NWHC) was founded in 1975 to provide technical assistance in identifying, controlling, and preventing wildlife losses from diseases, conduct research to understand the impact of diseases on wildlife populations, and devise methods to more effectively manage these disease threats. The impetus behind the creation of...
Groundwater quality in the Mojave area, California
Barbara J. Milby Dawson, Kenneth Belitz
2012, Fact Sheet 2012-3036
Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and increases public access to...
2008 Joint United States-Canadian program to explore the limits of the Extended Continental Shelf aboard the U.S. Coast Guard cutter Healy--Cruise HLY0806
Jonathan R. Childs, Peter J. Triezenberg, William W. Danforth
2012, Open-File Report 2012-1210
In September 2008, the U.S. Geological Survey (USGS), in cooperation with Natural Resources Canada, Geological Survey of Canada (GSC), conducted bathymetric and geophysical surveys in the Arctic Beaufort Sea aboard the U.S. Coast Guard cutter USCGC Healy. The principal objective of this mission to the high Arctic was to acquire...
Shallow groundwater quality and geochemistry in the Fayetteville Shale gas-production area, north-central Arkansas, 2011
Timothy M. Kresse, Nathaniel R. Warner, Phillip D. Hays, Adrian Down, Avner Vengosh, Robert B. Jackson
2012, Scientific Investigations Report 2012-5273
The Mississippian Fayetteville Shale serves as an unconventional gas reservoir across north-central Arkansas, ranging in thickness from approximately 50 to 550 feet and varying in depth from approximately 1,500 to 6,500 feet below the ground surface. Primary permeability in the Fayetteville Shale is severely limited, and successful extraction of the...
Groundwater quality in the Owens Valley, California
Barbara J. Milby Dawson, Kenneth Belitz
2012, Fact Sheet 2012-3032
Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and increases public access to...
Groundwater quality in Coachella Valley, California
Barbara J. Milby Dawson, Kenneth Belitz
2012, Fact Sheet 2012-3098
Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and increases public access to...
Status of groundwater quality in the California Desert Region, 2006-2008: California GAMA Priority Basin Project
Barbara J. Milby Dawson, Kenneth Belitz
2012, Scientific Investigations Report 2012-5040
Groundwater quality in six areas in the California Desert Region (Owens, Antelope, Mojave, Coachella, Colorado River, and Indian Wells) was investigated as part of the Priority Basin Project of the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The GAMA Priority Basin Project is being conducted by the California State Water...
Groundwater quality in the Indian Wells Valley, California
Barbara J. Milby Dawson, Kenneth Belitz
2012, Fact Sheet 2012-3035
Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and increases public access to...
Groundwater quality in the Antelope Valley, California
Barbara J. Milby Dawson, Kenneth Belitz
2012, Fact Sheet 2012-3033
Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and increases public access to...
Groundwater quality in the Colorado River basins, California
Barbara J. Milby Dawson, Kenneth Belitz
2012, Fact Sheet 2012-3034
Groundwater provides more than 40 percent of California’s drinking water. To protect this vital resource, the State of California created the Groundwater Ambient Monitoring and Assessment (GAMA) Program. The Priority Basin Project of the GAMA Program provides a comprehensive assessment of the State’s groundwater quality and increases public access to...
Sediment transport to and from small impoundments in northeast Kansas, March 2009 through September 2011
Guy M. Foster, Casey J. Lee, Andrew C. Ziegler
2012, Scientific Investigations Report 2012-5269
The U.S. Geological Survey, in cooperation with the Kansas Water Office, investigated sediment transport to and from three small impoundments (average surface area of 0.1 to 0.8 square miles) in northeast Kansas during March 2009 through September 2011. Streamgages and continuous turbidity sensors were operated upstream and downstream from Atchison...
Quality of surface water in Missouri, water year 2011
Miya N. Barr
2012, Data Series 734
The U.S. Geological Survey, in cooperation with the Missouri Department of Natural Resources, designed and operates a series of monitoring stations on streams throughout Missouri known as the Ambient Water-Quality Monitoring Network. During the 2011 water year (October 1, 2010, through September 30, 2011), data were collected at 75 stations—72...
Understanding the role of ecohydrological feedbacks in ecosystem state change in drylands
L. Turnbull, B.P. Wilcox, J. Belnap, S. Ravi, P. D’Odorico, D. Childers, W. Gwenzi, G. Okin, J. Wainwright, K.K. Caylor, T. Sankey
2012, Ecohydrology (5) 174-183
Ecohydrological feedbacks are likely to be critical for understanding the mechanisms by which changes in exogenous forces result in ecosystem state change. We propose that in drylands, the dynamics of ecosystem state change are determined by changes in the type (stabilizing vs amplifying) and strength of ecohydrological feedbacks following a...
