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Page 2015, results 50351 - 50375

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Geochemical database for the Boulder batholith and its satellitic plutons, Southwest Montana
Edward A. du Bray, Karen Lund, Robert I. Tilling, Paul Denning, Ed DeWitt
2009, Data Series 454
Geochemical data presented in this report pertain to Cretaceous igneous intrusions of the Boulder batholith and its satellitic plutons in southwest Montana. The geographic area addressed in this compilation is approximately bounded by lats 45.6 deg and 46.7 deg N. and longs 112.75 deg and 111.5 deg W. These data...
Bathymetry and Sediment-Storage Capacity Change in Three Reservoirs on the Lower Susquehanna River, 1996-2008
Michael J. Langland
2009, Scientific Investigations Report 2009-5110
The Susquehanna River transports a substantial amount of the sediment and nutrient load to the Chesapeake Bay. Upstream of the bay, three large dams and their associated reservoirs trap a large amount of the transported sediment and associated nutrients. During the fall of 2008, the U.S. Geological Survey in cooperation...
Ocean carbon and biogeochemistry scoping workshop on terrestrial and coastal carbon fluxes in the Gulf of Mexico, St. Petersburg, FL, May 6-8, 2008
L. L. Robbins, P.G. Coble, T.D. Clayton, W.J. Cai
2009, Open-File Report 2009-1070
Despite their relatively small surface area, ocean margins may have a significant impact on global biogeochemical cycles and, potentially, the global air-sea fluxes of carbon dioxide. Margins are characterized by intense geochemical and biological processing of carbon and other elements and exchange large amounts of matter and energy with the...
Regression equations for estimation of annual peak-streamflow frequency for undeveloped watersheds in Texas using an L-moment-based, PRESS-minimized, residual-adjusted approach
William H. Asquith, Meghan C. Roussel
2009, Scientific Investigations Report 2009-5087
Annual peak-streamflow frequency estimates are needed for flood-plain management; for objective assessment of flood risk; for cost-effective design of dams, levees, and other flood-control structures; and for design of roads, bridges, and culverts. Annual peak-streamflow frequency represents the peak streamflow for nine recurrence intervals of 2, 5, 10, 25, 50,...
The Gulf Sturgeon in the Suwannee River - Questions and Answers
Kenneth J. Sulak, Michael T. Randall
2009, General Information Product 72
Sturgeons and paddlefishes are modern descendants of an ancient group of freshwater fishes, the Chondrostei (a group of bony fishes with mostly cartilaginous skeletons). Sturgeons evolved during the Age of the Dinosaurs, and have prospered in the large rivers and lakes of North America, Europe and Asia for 200 million...
Occurrence and distribution of fecal indicator bacteria, and physical and chemical indicators of water quality in streams receiving discharge from Dallas/Fort Worth International Airport and vicinity, North-Central Texas, 2008
Glenn R. Harwell, Craig A. Mobley
2009, Scientific Investigations Report 2009-5103
This report, done by the U.S. Geological Survey in cooperation with Dallas/Fort Worth International (DFW) Airport in 2008, describes the occurrence and distribution of fecal indicator bacteria (fecal coliform and Escherichia [E.] coli), and the physical and chemical indicators of water quality (relative to Texas Surface Water Quality Standards), in...
Hydrographs Showing Groundwater Level Changes for Selected Wells in the Chambers-Clover Creek Watershed and Vicinity, Pierce County, Washington
G.B. Justin, R. Julich, K. L. Payne
2009, Data Series 453
Selected groundwater level hydrographs for the Chambers-Clover Creek watershed (CCCW) and vicinity, Washington, are presented in an interactive web-based map to illustrate changes in groundwater levels in and near the CCCW on a monthly and seasonal basis. Hydrographs are linked to points corresponding to the well location on an interactive...
USGS Capabilities to Study the Impacts of Drought and Climate Change in the Southeastern United States
Water Resources Division, U.S. Geological Survey
2009, Fact Sheet 2009-3014
In the Southeast, U.S. Geological Survey (USGS) scientists are researching issues through technical studies of water availability and quality, geologic processes (marine, coastal, and terrestrial), geographic complexity, and biological resources. The USGS is prepared to tackle multifaceted questions associated with global climate change and resulting weather patterns such as drought...
Three‐dimensional model of Hellenic Arc deformation and origin of the Cretan uplift
Athanassios Ganas, Tom Parsons
2009, Journal of Geophysical Research Solid Earth (114)
[1] The Hellenic Arc of Greece is the most seismically active part of Europe, but little is know about its mechanics. We modeled deformation along the arc using a finite element model. The model was intended to capture large‐scale 3‐D structure of Nubian plate subduction beneath the Aegean block and...
Vascular Plant and Vertebrate Inventory of Chiricahua National Monument
Brian F. Powell, Cecilia A. Schmidt, William L. Halvorson, Pamela Anning
2009, Open-File Report 2008-1023
This report summarizes the results of the first comprehensive inventory of vascular plants and vertebrates at Chiricahua National Monument (NM) in Arizona. This project was part of a larger effort to inventory vascular plants and vertebrates in eight National Park Service units in the Sonoran Desert Network of parks in...
Methods for Estimating Water Withdrawals for Aquaculture in the United States, 2005
John K. Lovelace
2009, Scientific Investigations Report 2009-5042
Aquaculture water use is associated with raising organisms that live in water - such as finfish and shellfish - for food, restoration, conservation, or sport. Aquaculture production occurs under controlled feeding, sanitation, and harvesting procedures primarily in ponds, flow-through raceways, and, to a lesser extent, cages, net pens, and tanks....
Topographic Change Detection at Select Archeological Sites in Grand Canyon National Park, Arizona, 2006-2007
Brian D. Collins, Diane L. Minasian, Robert Kayen
2009, Scientific Investigations Report 2009-5116
Topographic change of archeological sites within the Colorado River corridor of Grand Canyon National Park (GCNP) is a subject of interest to National Park Service managers and other stakeholders in the Glen Canyon Dam Adaptive Management Program. Although long-term topographic change resulting from a variety of natural processes is typical...
Channel morphodynamics in four reaches of the Lower Missouri River, 2006-07
Caroline M. Elliott, Joanna M. Reuter, Robert B. Jacobson
2009, Scientific Investigations Report 2009-5074
Channel morphodynamics in response to flow modifications from Gavins Point Dam are examined in four reaches of the Lower Missouri River. Measures include changes in channel morphology and indicators of sediment transport in four 6 kilometer long reaches located downstream from Gavins Point Dam, near Yankton, South Dakota, Kenslers Bend,...
Evapotranspiration Rates of Riparian Forests, Platte River, Nebraska, 2002-06
Matthew K. Landon, David L. Rus, Benjamin J. Dietsch, Michaela R. Johnson, Kathleen D. Eggemeyer
2009, Scientific Investigations Report 2008-5228
Evapotranspiration (ET) in riparian areas is a poorly understood component of the regional water balance in the Platte River Basin, where competing demands have resulted in water shortages in the ground-water/surface-water system. From April 2002 through March 2006, the U.S. Geological Survey, Nebraska Platte River Cooperative Hydrology Study Group, and...
A Whole-System Approach to Understanding Agricultural Chemicals in the Environment
Water Resources Division, U.S. Geological Survey
2009, Fact Sheet 2009-3042
The effects of the use of agricultural chemicals and other practices associated with agriculture on the quality of streams and groundwater is well known; however, less is known about how those effects may vary across different geographic regions of the Nation. Scientists at the U.S. Geological Survey (USGS) are conducting...
Effects of the upper Taum Sauk Reservoir embankment breach on the surface-water quality and sediments of the East Fork Black River and the Black River, southeastern Missouri–2006–07
Miya N. Barr
2009, Scientific Investigations Report 2009-5111
On December 14, 2005, a 680-foot wide section of the upper reservoir embankment of the Taum Sauk pump-storage hydroelectric powerplant located in Reynolds County, Missouri, suddenly failed. This catastrophic event sent approximately 1.5 billion gallons of water into the Johnson's Shut-Ins State Park and into the East Fork Black River,...
Biological-Community Composition in Small Streams and its Relations to Habitat, Nutrients, and Land Use in Agriculturally Dominated Landscapes in Indiana and Ohio, 2004, and Implications for Assessing Nutrient Conditions in Midwest Streams
Brian J. Caskey, Jeffrey W. Frey
2009, Scientific Investigations Report 2009-5055
The objective of this study was to relate algal-, invertebrate-, and fish-community composition to habitat, nutrients, and land-use variables in small streams in agriculturally dominated landscapes of the Midwest in Indiana and Ohio. Thirty sample locations were selected from a single ecoregion; all were small wadable streams within agriculturally dominated...
Spatial analysis of instream nitrogen loads and factors controlling nitrogen delivery to streams in the southeastern United States using spatially referenced regression on watershed attributes (SPARROW) and regional classification frameworks
Anne B. Hoos, Gerard McMahon
2009, Hydrological Processes (23) 2275-2294
Understanding how nitrogen transport across the landscape varies with landscape characteristics is important for developing sound nitrogen management policies. We used a spatially referenced regression analysis (SPARROW) to examine landscape characteristics influencing delivery of nitrogen from sources in a watershed to stream channels. Modelled landscape delivery ratio varies widely (by...
Local and Cumulative Impervious Cover of Massachusetts Stream Basins
Sara L. Brandt, Peter A. Steeves
2009, Data Series 451
Impervious surfaces such as paved roads, parking lots, and building roofs can affect the natural streamflow patterns and ecosystems of nearby streams. This dataset summarizes the percentage of impervious area for watersheds across Massachusetts by using a newly available statewide 1-m binary raster dataset of impervious surface for 2005. In...
Salinization of the upper Colorado River - Fingerprinting geologic salt sources
Michele L. Tuttle, Richard I. Grauch
2009, Scientific Investigations Report 2009-5072
Salt in the upper Colorado River is of concern for a number of political and socioeconomic reasons. Salinity limits in the 1974 U.S. agreement with Mexico require the United States to deliver Colorado River water of a particular quality to the border. Irrigation of crops, protection of wildlife habitat, and...
Detection of conveyance changes in St. Clair River using historical water-level and flow data with inverse one-dimensional hydrodynamic modeling
David J. Holtschlag, C. J. Hoard
2009, Scientific Investigations Report 2009-5080
St. Clair River is a connecting channel that transports water from Lake Huron to the St. Clair River Delta and Lake St. Clair. A negative trend has been detected in differences between water levels on Lake Huron and Lake St. Clair. This trend may indicate a combination of flow and...
Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2006
Jeffrey D. Martin
2009, Scientific Investigations Report 2009-5062
This report provides a water-quality data set of 44 commonly used pesticides and 8 pesticide degradates suitable for a national assessment of trends in pesticide concentrations in streams of the United States. Water-quality samples collected from January 1992 through August 2006 at stream-water sites of the U.S. Geological Survey National...
Testing and refining the Ohio Nowcast at two Lake Erie beaches— 2008
Donna S. Francy, Erin E. Bertke, Robert A. Darner
2009, Open-File Report 2009-1066
The Ohio Nowcast has been providing real-time beach advisories to the public on the basis of predictive models since 2006. In support of the nowcast, data were collected during the recreational season of 2008 to validate and refine predictive models at two Lake Erie beaches. Predictive models yield data on...
Analytical Results for Agricultural Soils Samples from a Monitoring Program Near Deer Trail, Colorado (USA)
J.G. Crock, D. B. Smith, T. J. B. Yager
2009, Open-File Report 2009-1111
Since late 1993, Metro Wastewater Reclamation District of Denver (Metro District, MWRD), a large wastewater treatment plant in Denver, Colorado, has applied Grade I, Class B biosolids to about 52,000 acres of nonirrigated farmland and rangeland near Deer Trail, Colorado, USA. In cooperation with the Metro District in 1993, the...