Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Results

165658 results.

Alternate formats: RIS file of the first 3000 search results  |  Download all results as CSV | TSV | Excel  |  RSS feed based on this search  |  JSON version of this page of results

Page 1699, results 42451 - 42475

Show results on a map

Publication Extents

Not all publications have extents, not all extents are completely accurate
Movement and spawning of American shad transported above dams on the Roanoke River, North Carolina and Virginia
Julianne E. Harris, Joseph E. Hightower
2011, North American Journal of Fisheries Management (31)
American shad Alosa sapidissima are in decline throughout much of their native range as a result of overfishing, pollution, and habitat alteration in coastal rivers where they spawn. One approach to restoration in regulated rivers is to provide access to historical spawning habitat above dams through a trap-and-transport program. We examined the...
Archive of Digital Boomer Sub-bottom Data Collected During USGS Field Activities 97LCA01, 97LCA02, and 97LCA03, West-Central and East Coast Florida, February through July 1997
Arnell S. Forde, Shawn V. Dadisman, Patricia A. Metz, Ann B. Tihansky, Jeffrey B. Davis, Dana S. Wiese
2011, Data Series 582
From February through July of 1997, the U.S. Geological Survey (USGS) conducted geophysical surveys of several Florida water bodies as part of the USGS Lakes and Coastal Aquifers (LCA) study. These areas include Lakes Dosson, Halfmoon and Round in west-central Florida and Sebastian Inlet and Indian River Lagoon on the...
Trace element, semivolatile organic, and chlorinated organic compound concentrations in bed sediments of selected streams at Fort Gordon, Georgia, February-April 2010
Lashun K. Thomas, Celeste A. Journey, Whitney J. Stringfield, Jimmy M. Clark, Paul M. Bradley, John B. Wellborn, Hagan Ratliff, Thomas A. Abrahamsen
2011, Open-File Report 2011-1067
A spatial survey of streams was conducted from February to April 2010 to assess the concentrations of major ions, selected trace elements, semivolatile organic compounds, organochlorine pesticides, and polychlorinated biphenyls associated with the bed sediments of surface waters at Fort Gordon military installation near Augusta, Georgia. This investigation expanded a...
Assessment of soil-gas and soil contamination at the Old Metal Workshop Hog Farm Area, Fort Gordon, Georgia, 2009-2010
Andral W. Caldwell, W. Fred Falls, Wladmir B. Guimaraes, W. Hagan Ratliff, John B. Wellborn, James Landmeyer
2011, Open-File Report 2011-1080
Soil gas and soil were assessed for contaminants at the Old Metal Workshop Hog Farm Area at Fort Gordon, Georgia, from October 2009 to September 2010. The assessment included delineating organic contaminants present in soil-gas and inorganic contaminants present in soil samples collected from the area estimated to be the...
Libraries program
2011, General Information Product 125
The U.S. Congress authorized a library for the U.S. Geological Survey (USGS) in 1879. The library was formally established in 1882 with the naming of the first librarian and began with a staff of three and a collection of 1,400 books. Today, the USGS Libraries Program is one of the world's...
Geophysical data collected from the St. Clair River between Michigan and Ontario, Canada (2008-016-FA)
Jane F. Denny, D.S. Foster, C.R. Worley, Barry J. Irwin
2011, Open-File Report 2010-1035
In 2008, the U.S. Geological Survey (USGS), Woods Hole Coastal and Marine Science Center (WHCMSC), in cooperation with the U.S. Army Corps of Engineers conducted a geophysical and sampling survey of the riverbed of the Upper St. Clair River between Port Huron, Mich., and Sarnia, Ontario, Canada. The objectives were...
Characterizing the size distribution of particles in urban stormwater by use of fixed-point sample-collection methods
William R. Selbig, Roger T. Bannerman
2011, Open-File Report 2011-1052
The U.S Geological Survey, in cooperation with the Wisconsin Department of Natural Resources (WDNR) and in collaboration with the Root River Municipal Stormwater Permit Group monitored eight urban source areas representing six types of source areas in or near Madison, Wis. in an effort to improve characterization of particle-size distributions...
Exploring sensitivity of a multistate occupancy model to inform management decisions
A.W. Green, L.L. Bailey, J.D. Nichols
2011, Journal of Applied Ecology (48) 1007-1016
1. Dynamic occupancy models are often used to investigate questions regarding the processes that influence patch occupancy and are prominent in the fields of population and community ecology and conservation biology. Recently, multistate occupancy models have been developed to investigate dynamic systems involving more than one occupied state, including reproductive states,...
Flow speed estimated by inverse modeling of sandy sediment deposited by the 29 September 2009 tsunami near Satitoa, east Upolu, Samoa
Bruce E. Jaffe, Mark Buckley, Bruce M. Richmond, Luke Strotz, Samuel Etienne, Kate Clark, Steve Watt, Guy R. Gelfenbaum, James Goff
2011, Earth-Science Reviews (107) 23-37
Sandy deposits from the 29 September 2009 tsunami on the east coast of Upolu, Samoa were investigated to document their characteristics and used to apply an inverse sediment transport model to estimate tsunami flow speed. Sandy deposits 6 to 15 cm thick formed from ~ 25 to ~ 250 m inland. Sedimentary layers in...
Rocky Mountain snowpack physical and chemical data for selected sites, 2010
George P. Ingersoll, M. Alisa Mast, James M. Swank, Chelsea D. Campbell
2011, Data Series 570
The Rocky Mountain Snowpack program established a network of snowpack-sampling sites in the Rocky Mountain region, from New Mexico to Montana, to monitor the chemical content of snow and to understand the effects of regional atmospheric deposition on freshwater systems. Scientists with the U.S. Geological Survey, in cooperation with the...
Geomorphic Classification and Evaluation of Channel Width and Emergent Sandbar Habitat Relations on the Lower Platte River, Nebraska
Caroline M. Elliott
2011, Scientific Investigations Report 2011-5028
This report presents a summary of geomorphic characteristics extracted from aerial imagery for three broad segments of the Lower Platte River. This report includes a summary of the longitudinal multivariate classification in Elliott and others (2009) and presents a new analysis of total channel width and habitat variables. Three segments...
Assessment of nutrient enrichment by use of algal-, invertebrate-, and fish-community attributes in wadeable streams in ecoregions surrounding the Great Lakes
Jeffrey W. Frey, Amanda H. Bell, Julie A. Hambrook Berkman, David L. Lorenz
2011, Scientific Investigations Report 2011-5009
The algal, invertebrate, and fish taxa and community attributes that best reflect the effects of nutrients along a gradient of low to high nutrient concentrations in wadeable, primarily midwestern streams were determined as part of the U.S. Geological Suvey's National Water-Quality Assessment (NAWQA) Program. Nutrient data collected from 64 sampling...
Developing climate data records and essential climate variables from landsat data
John Dwyer, Thomas P. Dinardo, Douglas M. Muchoney
2011, Conference Paper, 34th International Symposium on Remote Sensing of Environment: the GEOSS era : towards operational environmental monitoring : April 10-15, 2011, Sydney, Australia : proceedings.
The series of Landsat missions has compiled the longest record of satellite observation of the Earth’s land surface, extending for more than 38 years for most areas of the globe. Landsat data are particularly important as long term climate data records because the scale of observation is sufficient to differentiate...
Enhanced Late Holocene ENSO/PDO expression along the margins of the eastern North Pacific
John A. Barron, Lesleigh Anderson
2011, Quaternary International (235) 3-12
Pacific climate is known to have varied during the Holocene, but spatial patterns remain poorly defined. This paper compiles terrestrial and marine proxy data from sites along the northeastern Pacific margins and proposes that they indicate 1) suppressed ENSO conditions during the middle Holocene between ∼8000 and 4000 cal BP with...
Regression models of ecological streamflow characteristics in the Cumberland and Tennessee River Valleys
Rodney R. Knight, W. Scott Gain, William J. Wolfe
2011, Conference Paper, Proceedings from the 21st Tennessee American Water Resources Symposium
Predictive equations were developed using stepbackward regression for 19 ecologically relevant streamflow characteristics grouped in five major classes (magnitude, ratio, frequency, variability, and date) for use in the Tennessee and Cumberland River watersheds. Basin characteristics explain 50 percent or more of the variation for 10 of the 19 equations. Independent...
Benthic habitat classification in Lignumvitae Key Basin, Florida Bay, using the U.S. Geological Survey Along-Track Reef Imaging System (ATRIS)
C. D. Reich, D.G. Zawada, P.R. Thompson, C.E. Reynolds, A.H. Spear, D.K. Umberger, R.Z. Poore
2011, Open-File Report 2011-1066
The Comprehensive Everglades Restoration Plan (CERP) funded in partnership between the U.S. Army Corps of Engineers, South Florida Water Management District, and other Federal, local and Tribal members has in its mandate a guideline to protect and restore freshwater flows to coastal environments to pre-1940s conditions (CERP, 1999). Historic salinity...
A study of topics for distance education-A survey of U.S. Fish and Wildlife Service employees
Joan M. Ratz, Rudy M. Schuster, Ann H. Marcy
2011, Open-File Report 2011-1075
The purpose of this study was to identify training topics and distance education technologies preferred by U.S. Fish and Wildlife Service employees. This study was conducted on behalf of the National Conservation Training Center to support their distance education strategy planning and implementation. When selecting survey recipients, we focused on...
Sources and physical processes responsible for OH/H2O in the lunarsoil as revealed by the Moon Mineralogy Mapper (M3)
T. B. McCord, L.A. Taylor, J. #NAME? Combe, G. Kramer, C.M. Pieters, J.M. Sunshine, R. N. Clark
2011, Journal of Geophysical Research E: Planets (116) 1-22
Analysis of two absorption features near 3 μm in the lunar reflectance spectrum, observed by the orbiting M3 spectrometer and interpreted as being due to OH and H2O, is presented, and the results are used to discuss the processes producing these molecules. This analysis focuses on the dependence of the absorptions on...
Saline aquifer mapping project in the southeastern United States
Lester J. Williams, Rick M. Spechler
2011, Conference Paper, Proceedings of the 2011 Georgia Water Resources Conference
In 2009, the U.S. Geological Survey initiated a study of saline aquifers in the southeastern United States to evaluate the potential use of brackish or saline water from the deeper portions of the Floridan aquifer system and the underlying Coastal Plain aquifer system (Fig. 1). The objective of this study...
Regional groundwater-flow model of the Redwall-Muav, Coconino, and alluvial basin aquifer systems of northern and central Arizona
D. R. Pool, Kyle W. Blasch, James B. Callegary, Stanley A. Leake, Leslie F. Graser
2011, Scientific Investigations Report 2010-5180
A numerical flow model (MODFLOW) of the groundwater flow system in the primary aquifers in northern Arizona was developed to simulate interactions between the aquifers, perennial streams, and springs for predevelopment and transient conditions during 1910 through 2005. Simulated aquifers include the Redwall-Muav, Coconino, and basin-fill aquifers. Perennial stream reaches...
Summary of hydrologic testing of the Floridan aquifer system at Fort Stewart, coastal Georgia, 2009-2010
Gerald J. Gonthier
2011, Conference Paper, Proceedings of the 2011 Georgia Water Resources Conference
Two test wells were completed at Fort Stewart, coastal Georgia, to investigate the potential for using the Lower Floridan aquifer as a source of water to satisfy anticipated, increased water needs. The U.S. Geological Survey, in cooperation with the U.S. Department of the Army, completed hydrologic testing of the Floridan...
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...
Evaluation of LiDAR-acquired bathymetric and topographic data accuracy in various hydrogeomorphic settings in the Deadwood and South Fork Boise Rivers, West-Central Idaho, 2007
Kenneth D. Skinner
2011, Scientific Investigations Report 2011-5051
High-quality elevation data in riverine environments are important for fisheries management applications and the accuracy of such data needs to be determined for its proper application. The Experimental Advanced Airborne Research LiDAR (Light Detection and Ranging)-or EAARL-system was used to obtain topographic and bathymetric data along the Deadwood and South...