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Page 1740, results 43476 - 43500

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Time-domain electromagnetic soundings collected in Dawson County, Nebraska, 2007-09
Jason Payne, Andrew Teeple
2011, Data Series 581
Between April 2007 and November 2009, the U.S. Geological Survey, in cooperation with the Central Platte Natural Resources District, collected time-domain electro-magnetic (TDEM) soundings at 14 locations in Dawson County, Nebraska. The TDEM soundings provide information pertaining to the hydrogeology at each of 23 sites at the 14 locations; 30...
Estimated loads of suspended sediment and selected trace elements transported through the Clark Fork basin, Montana, in selected periods before and after the breach of Milltown Dam (water years 1985-2009)
Steven K. Sando, John H. Lambing
2011, Scientific Investigations Report 2011-5030
Milltown Reservoir is a National Priorities List Superfund site in the upper Clark Fork basin of western Montana where sediments enriched in trace elements from historical mining and ore processing have been deposited since the completion of Milltown Dam in 1908. Milltown Dam was breached on March 28, 2008, as...
Magnitude and Frequency of Floods for Urban and Small Rural Streams in Georgia, 2008
Anthony J. Gotvald, Andrew E. Knaak
2011, Scientific Investigations Report 2011-5042
A study was conducted that updated methods for estimating the magnitude and frequency of floods in ungaged urban basins in Georgia that are not substantially affected by regulation or tidal fluctuations. Annual peak-flow data for urban streams from September 2008 were analyzed for 50 streamgaging stations (streamgages) in Georgia and...
The chronology for the d18O record from Devils Hole, Nevada, extended into the Mid-Holocene
J.M. Landwehr, W.D. Sharp, T.B. Coplen, K.R. Ludwig, I.J. Winograd
2011, Open-File Report 2011-1082
This report presents the numeric values for the chronology of the paleoclimatically relevant mid-to-late Pleistocene record of the ratios of stable oxygen isotope (delta18O) in vein calcite from Devils Hole, Nev., which recently had been extended into the mid-Holocene. Dating was obtained using 230Th-234U-238U thermal ionization mass spectrometry. Devils Hole is...
Natural gas production and anomalous geothermal gradients of the deep Tuscaloosa Formation
Lauri Burke
2011, Open-File Report 2011-1086
For the largest producing natural gas fields in the onshore Gulf of Mexico Basin, the relation between temperature versus depth was investigated. Prolific natural gas reservoirs with the highest temperatures were found in the Upper Cretaceous downdip Tuscaloosa trend in Louisiana. Temperature and production trends from the deepest field, Judge...
Analysis of long-term trends in flow from a large spring complex in northern Florida
Jack W. Grubbs
Eve L. Kuniansky, editor(s)
2011, Conference Paper, U.S. Geological Survey Karst Interest Group proceedings
Nonparametric regression analysis of historic flow and rainfall data was used to estimate declining flows in a river draining a large spring complex in northern Florida, USA. The analysis indicated that flow declined by an estimated 23 percent from 1900 to 2009. The rate of decline appeared to increase over...
Surficial geology of the sea floor in Long Island Sound offshore of Orient Point, New York
K.Y. McMullen, L.J. Poppe, W. W. Danforth, D.S. Blackwood, J.D. Schaer, M.R. Guberski, D.A. Wood, E. F. Doran
2011, Open-File Report 2010-1100
The U.S. Geological Survey (USGS), the National Oceanic and Atmospheric Administration (NOAA), and the Connecticut Department of Environmental Protection (CT DEP) are working cooperatively to map and interpret features of the sea floor along the northeastern coast of the United States. This report presents multibeam bathymetry and sidescan-sonar data obtained...
WTAQ version 2-A computer program for analysis of aquifer tests in confined and water-table aquifers with alternative representations of drainage from the unsaturated zone
Paul M. Barlow, Allen F. Moench
2011, Techniques and Methods 3-B9
The computer program WTAQ simulates axial-symmetric flow to a well pumping from a confined or unconfined (water-table) aquifer. WTAQ calculates dimensionless or dimensional drawdowns that can be used with measured drawdown data from aquifer tests to estimate aquifer hydraulic properties. Version 2 of the program, which is described in this...
Sea-floor geology and topography offshore in Eastern Long Island Sound
L.J. Poppe, K.Y. McMullen, S.D. Ackerman, D.S. Blackwood, J.D. Schaer, M.R. Forrest, A.J. Ostapenko, E. F. Doran
2011, Open-File Report 2010-1150
A gridded multibeam bathymetric dataset covers approximately 133.7 square kilometers of sea floor offshore in eastern Long Island Sound. Although originally collected for charting purposes during National Oceanic and Atmospheric Administration hydrographic survey H11997, these acoustic data, and the sea-floor sampling and photography stations subsequently occupied to verify them during...
Water Science Programs in Kansas
Andy Ziegler
2011, General Information Product 121
The USGS has collected hydrologic information in Kansas since 1895 with the first USGS Cooperative Water Program funding agreement for 6 streamflow gages with the Kansas Water Board. USGS collects streamflow and gage-height data; reservoir content; water-quality and water-quantity data; suspended-sediment data; and groundwater levels. Hydrologic studies are conducted on...
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...
Stream profile analyses using a step-backwater model for selected reaches in the Chippewa Creek Basin in Medina, Wayne, and Summit Counties, Ohio
David E. Straub, Andrew D. Ebner
2011, Scientific Investigations Report 2011-5024
The USGS, in cooperation with the Chippewa Subdistrict of the Muskingum Watershed Conservancy District, performed hydrologic and hydraulic analyses for selected reaches of three streams in Medina, Wayne, Stark, and Summit Counties in northeast Ohio: Chippewa Creek, Little Chippewa Creek, and River Styx. This study was done to facilitate assessment...
2008 Volcanic activity in Alaska, Kamchatka, and the Kurile Islands: Summary of events and response of the Alaska Volcano Observatory
Christina A. Neal, Robert G. McGimsey, James P. Dixon, Cheryl E. Cameron, Anton A. Nuzhdaev, Marina Chibisova
2011, Scientific Investigations Report 2010-5243
The Alaska Volcano Observatory (AVO) responded to eruptions, possible eruptions, and volcanic unrest or suspected unrest at seven separate volcanic centers in Alaska during 2008. Significant explosive eruptions at Okmok and Kasatochi Volcanoes in July and August dominated Observatory operations in the summer and autumn. AVO maintained 24-hour staffing at...
Mysid and fish zooplanktivory in Lake Ontario: quantification of direct and indirect effects
Gideon Gal, Lars G. Rudstam, Edward L. Mills, Jana R. Lantry, Ora E. Johannsson, C. Greene
2011, Canadian Journal of Fisheries and Aquatic Sciences (63) 2734-2747
Mysis relicta and planktivorous fish feed on zooplankton in Lake Ontario and form a trophic triangle that includes intraguild predation by fish on mysids. Thus, fish affect zooplankton both directly and indirectly. To evaluate the importance of alewife (Alosa pseudoharengus), rainbow smelt (Osmerus mordax), and mysids as zooplanktivores in Lake...
Ontology patterns for complex topographic feature types
Dalia E. Varanka
2011, Cartography and Geographic Information Science (38) 126-136
Complex feature types are defined as integrated relations between basic features for a shared meaning or concept. The shared semantic concept is difficult to define in commonly used geographic information systems (GIS) and remote sensing technologies. The role of spatial relations between complex feature parts was recognized in early GIS...
Predicting community responses to perturbations in the face of imperfect knowledge and network complexity
Mark Novak, J. Timothy Wootton, Daniel F. Doak, Mark Emmerson, James A. Estes, M. Timothy Tinker
2011, Ecology (92) 836-846
How best to predict the effects of perturbations to ecological communities has been a long-standing goal for both applied and basic ecology. This quest has recently been revived by new empirical data, new analysis methods, and increased computing speed, with the promise that ecologically important insights may be obtainable from...
Microhabitat use and seasonal movements of hatchery-reared and wild shortnose sturgeon in the Savannah River, South Carolina--Georgia
D.G. Trested, K.M. Ware, R. Bakal, J. Jeffery Isely
2011, Journal of Applied Ichthyology (27) 454-461
Radio and acoustic telemetry were used to monitor the seasonal movement of hatchery-reared and wild shortnose sturgeon (622-927 mm total length) in the Savannah River. Diploid, and sterile hatchery-reared shortnose sturgeon, and wild shortnose sturgeon showed apparent similar seasonal patterns of movement within the river. We were unable to detect...
Identification and evaluation of shark bycatch in Georgia’s commercial shrimp trawl fishery with implications for management
C.N. Belcher, Cecil A. Jennings
2011, Fisheries Management and Ecology (18) 104-112
Many US states have recreational and commercial fisheries that occur in nursery areas occupied by subadult sharks and can potentially affect their survival. Georgia is one of few US states without a directed commercial shark fishery, but the state has a large, nearshore penaeid shrimp trawl fishery in which small...
Effects of conservation practices on wetland ecosystem services in the Mississippi Alluvial Valley
Stephen Faulkner, Wylie C. Barrow Jr., Bob Keeland, Susan E. Walls, David Telesco
2011, Ecological Applications (21) s31-s48
Restoration of wetland ecosystems is an important priority for many state and federal agencies, as well as nongovernmental conservation organizations. The historic conversion of wetlands in the Mississippi Alluvial Valley (MAV) has resulted in large‐scale implementation of a variety of conservation practices designed to restore and enhance wetland ecosystem services....
Characterization of small microsatellite loci isolated in endangered Indiana bat (Myotis sodalis) for use in non-invasive sampling
Sara J. Oyler-McCance, Jennifer A. Fike
2011, Conservation Genetics Resources (3) 243-245
Primers for 10 microsatellite loci were developed specifically to amplify low quantity and quality DNA in the endangered Indiana Bat (Myotis sodalis). In a screen of 20 individuals from a population in Missouri, the 10 loci were found to have levels of variability ranging from seven to 18 alleles. No...
Integrating estimates of ecosystem services from conservation programs and practices into models for decision makers
Ned Euliss, Loren M. Smith, Shuguang Liu, Walter G. Duffy, Stephen Faulkner, Robert A. Gleason, S. Diane Eckles
2011, Ecological Applications (21) 5128-5134
Most government agencies involved in land management are seeking consistent approaches to evaluate the effects of specific management actions on ecological processes and concurrent changes on ecosystem services. This is especially true within the context of anthropogenic influences, such as land use and climate change. The Conservation Effects Assessment Project—Wetlands...