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Page 53, results 1301 - 1325

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Not all publications have extents, not all extents are completely accurate
Assessment of undiscovered oil and gas resources of the Dnieper-Donets Basin Province and Pripyat Basin Province, Russia, Ukraine, and Belarus, 2010
T. R. Klett
2011, Fact Sheet 2011-3051
The U.S. Geological Survey, using a geology-based assessment methodology, estimated mean volumes of technically recoverable, conventional, undiscovered petroleum resources at 84 million barrels of crude oil, 4.7 trillion cubic feet of natural gas, and 130 million barrels of natural gas liquids for the Dnieper-Donets Basin Province and 39 million barrels...
Amphibian monitoring in the Atchafalaya Basin
Hardin Waddle
2011, Fact Sheet 2011-3056
Amphibians are a diverse group of animals that includes frogs, toads, and salamanders. They are adapted to living in a variety of habitats, but most require water for at least one life stage. Amphibians have recently become a worldwide conservation concern because of declines and extinctions even in remote protected...
Using models for the optimization of hydrologic monitoring
Michael N. Fienen, Randall J. Hunt, John E. Doherty, Howard W. Reeves
2011, Fact Sheet 2011-3014
Hydrologists are often asked what kind of monitoring network can most effectively support science-based water-resources management decisions. Currently (2011), hydrologic monitoring locations often are selected by addressing observation gaps in the existing network or non-science issues such as site access. A model might then be calibrated to available data and...
Nitrate concentrations and potential sources in the Barton Springs segment of the Edwards aquifer and its contributing zone, Central Texas
Barbara Mahler, MaryLynn Musgrove, Chris Herrington
2011, Fact Sheet 2011-3035
The area contributing recharge to Barton Springs is undergoing rapid growth, accompanied by increased generation of wastewater. This study found that nitrate, a major component of wastewater and a nutrient that can degrade water quality, has increased in Barton Springs and the creeks that provide its recharge....
Understanding processes affecting mineral deposits in humid environments
Robert R. Seal II, Robert A. Ayuso
2011, Fact Sheet 2010-3105
Recent interdisciplinary studies by the U.S. Geological Survey have resulted in substantial progress toward understanding the influence that climate and hydrology have on the geochemical signatures of mineral deposits and the resulting mine wastes in the eastern United States. Specific areas of focus include the release, transport, and fate of...
Enhancement of USGS scientific investigations in Texas by using geophysical techniques, 2005-10
Gregory P. Stanton, Jason Payne, Andrew Teeple, Jonathan V. Thomas
2011, Fact Sheet 2011-3037
Geophysical techniques are an increasingly important tool for scientific investigations, environmental planning, and resource management. During 2005-10 the U.S. Geological Survey Texas Water Science Center greatly expanded its capabilities of using surface and borehole geophysical techniques to gain insights into how groundwater systems work and the occurrence and distribution of...
Examination of brine contamination risk to aquatic resources from petroleum development in the Williston Basin
Robert A. Gleason, Joanna N. Thamke, Bruce D. Smith, Brian A. Tangen, Tara L. Chesley-Preston, Todd M. Preston
2011, Fact Sheet 2011-3047
U.S. Geological Survey scientists and cooperating partners are examining the potential risk to aquatic resources (for example, wetlands, streams) by contamination from saline waters (brine) produced by petroleum development in the Williston Basin of Montana, North Dakota, and South Dakota. The primary goals of this study are to provide a...
The National Map
Larry J. Sugarbaker, William J. Carswell Jr.
2011, Fact Sheet 2011-3042
Groundwater quality in the Northern Sacramento Valley, California
George L. V Bennett V, Miranda S. Fram, Kenneth Belitz
2011, Fact Sheet 2011-3004
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 Southern Sacramento Valley, California
George L. V Bennett V, Miranda S. Fram, Kenneth Belitz
2011, Fact Sheet 2011-3006
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...
Floristic Quality Index: An assessment tool for restoration projects and monitoring sites in coastal Louisiana
K.F. Cretini, G.D. Steyer
2011, Fact Sheet 2011-3044
The Coastwide Reference Monitoring System (CRMS) program was established to assess the effectiveness of individual coastal restoration projects and the cumulative effects of multiple projects at regional and coastwide scales. In order to make these assessments, analytical teams have been assembled for each of the primary data types sampled under...
Wyoming groundwater-quality monitoring network
Gregory K. Boughton
2011, Fact Sheet 2011-3041
A wide variety of human activities have the potential to contaminate groundwater. In addition, naturally occurring constituents can limit the suitability of groundwater for some uses. The State of Wyoming has established rules and programs to evaluate and protect groundwater quality based on identified uses. The Wyoming Groundwater-Quality Monitoring Network...
Hurricane impact and recovery shoreline change analysis of the Chandeleur Islands, Louisiana, USA: 1855 to 2005
Sarah M. Fearnley, Michael Miner, John Brock
2011, Fact Sheet 2011-3039
Results from historical (1855-2005) shoreline change analysis of the Chandeleur Islands, Louisiana, demonstrate that tropical cyclone frequency dominates the long-term evolution of this barrier-island arc. The detailed results of this study were published in December 2009 as part of a special issue of Geo-Marine Letters that documents early results from...
Water Resources of Lafayette Parish
Robert B. Fendick Jr., Jason M. Griffith, Lawrence B. Prakken
2011, Fact Sheet 2010-3048
Fresh groundwater and surface water resources are available in Lafayette Parish, which is located in south-central Louisiana. In 2005, more than 47 million gallons per day (Mgal/d) were withdrawn from water sources in Lafayette Parish. About 92 percent (43.7 Mgal/d) of withdrawals was groundwater, and 8 percent (3.6 Mgal/d) was...
Holocene evolution of Apalachicola Bay, Florida
Lisa E. Osterman, David C. Twichell
2011, Fact Sheet 2011-3028
A program of geophysical mapping and vibracoring was conducted in 2007 to better understand the geologic evolution of Apalachicola Bay and its response to sea-level rise. A detailed geologic history could help better understand how this bay may respond to both short-term (for example, storm surge) and long-term sea-level rise....
Buffelgrass-Integrated modeling of an invasive plant
Tracy R. Holcombe
2011, Fact Sheet 2011-3022
Buffelgrass (Pennisetum ciliare) poses a problem in the deserts of the United States, growing in dense stands and introducing a wildfire risk in an ecosystem not adapted to fire. The Invasive Species Science Branch of the Fort Collins Science Center has worked with many partners to develop a decision support...