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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 157 for “"USGS"”.
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NRCS Curve Number Calibration Using USGS Regression Equations
… using the United States Geological Survey (USGS) regression equations. In this study, the peak flow values estimated using the regression equations were used in conjunction with a dimensionless hydrograph to compute runoff volume. The National Oceanic and Atmospheric Administration (NOAA) …
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Estimation of sustainable production limit by using lumped parameter and USGS hydrotherm simulation
… has been used to simulate reservoir conditions. USGS Hydrotherm simulations were created using Lumpfit V3 results. The purpose of using software of USGS Hydrotherm is to create the reservoir geometry which is ignored in the first step of Lumpfit V3 and to analyze the response of the reservoir …
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Cenozoic Evolution of the Gold Creek Basin, Western Montana: Mapping and Documenting the Geology of the Rock Creek Lake 7.5' USGS Quadrangle
… of geology within the Rock Creek Lake 7.5’ USGS Quadrangle in western Montana. The purpose of this study is to 1) document the Cenozoic structural evolution and sedimentary fill record associated with tectonic development of the northern Flint Creek Range and, in particular, the Anaconda …
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Cenozoic Evolution of the Gold Creek Basin, Western Montana: Mapping and Documenting the Geology of the Rock Creek Lake 7.5' USGS Quadrangle
… of geology within the Rock Creek Lake 7.5’ USGS Quadrangle in western Montana. The purpose of this study is to 1) document the Cenozoic structural evolution and sedimentary fill record associated with tectonic development of the northern Flint Creek Range and, in particular, the Anaconda …
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Evaluating Changes in Terrestrial Hydrological Components Due to Climate Change in the Chesapeake Bay Watershed
… datasets of United States Geological Survey (USGS) streamflow gages, actual evapotranspiration from USGS Simplified Surface Energy Balance (SSEBop) Model and soil moisture from Soil Analysis Climate Network (SCAN). Six best performing Global Climate Models (GCM) based on Multivariate Adaptive …
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Single digital-photo correction for a GIS application and error analysis
… by control and test data from digital photos and USGS 1:24,000 topographic maps and by USGS 7.5-minute DEMs of two study areas, Prentiss, North Carolina and Blacksburg, Virginia. The collinearity equations were used to remove geometric errors caused by image tilt and relief, displacement. In …
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The role of research scientists in adaptive management programs
… of scientists within the US Geological Survey (USGS). USGS is a research science organization within the Federal government, and as such is constantly facing the tension between science and policy. Their experience is used as a proxy for typical interactions between scientists and policy makers. …
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A study of four raster-based data generalization procedures
… studied as part of the U.S. Geological Survey's (USGS) Federal Land Information System (FLIS). Area filtering, category aggregation, resampling, and modal search and replace comprised the strategies tested on USGS Alaska Interim Land Cover data. Generalization of the land cover data was deemed …
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A Procedure for the Preliminary Assessment of Water Supply Availability
… in the United States. The procedure uses the USGS demand cataloging unit as the basic planning area, with supply estimates from streamflow parameters at USGS gage locations and demand estimates from USGS demand reports. By comparing known supply and demand estimates in a base year, an overview …
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Comparison of Two Algorithms for Removing Depressions and Delineating Flow Networks From Grid Digital Elevation Models
… the occurrence of depressions in 30m USGS DEMs and assess correlations to watershed topographic characteristics, and 2) compare the performance of two algorithms used to remove depressions and delineate flow networks from DEMs. Sixty-six watersheds were selected to represent a range of …
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An Assessment of the Relationship of Online Technical Resources Developed by The National Weather Service (NWS) and United State Geological Survey (USGS) and the Analysis of Their Usage by Kentucky Emergency Managers during Preparedness, Response, Recovery, and Mitigation
… (NWS) and United States Geological Survey (USGS). This research will take into account the county emergency manager's years of experience, county disaster number, and county population to determine areas where a relationship exists between the technology and the county attributes. …
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Interpretation of tectonics from digital elevation data in the San Gabriel Mountains, CA : evaluation of methods and data sources
… meter resolution), ASTER (30 meter resolution), USGS (30 meter resolution) and USGS (10 meter resolution) DEMs analysis suggest that USGS DEM-10 meters and SRTM DEM-30 meters are currently the most accurate methods to accurately quantify differential steepness and concavity values for the area of …
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Estimation of Non-Linear Seismic Site Effects for Deep Deposits of the Mississippi Embayment
… Hazard Reduction Program (NEHRP), are used with USGS hazard maps to develop site specific recommended response spectrum. The coefficients are developed for 30 m thick soil profile and do not account for the depth of the soil column. A suite of ground motion time histories are developed that in …
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Historical Channel Adjustments in the Pascagoula River Basin and Adjacent Systems, Southeast Mississippi
… measurement notes, taken at established USGS gaging stations, were used to determine incremental width, depth, and discharge values. For each section and date, individual depth measurements were subtracted from the adjusted mean gage height, which represents the channel bed or submerged …
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Groundwater Modeling and Hydrogeological Parameter Estimation: Potomac Aquifer System, SWIFT Research Center
… on the sublayer, while travel times from the USGS MW within the UPA sublayers ranged from 2,395 to 7,859 days. For the single layer model of the UPA, the travel time from the SWIFT MW to TW-1 was 372 days while the travel time from the USGS MW was 4,839 days. Travel times from the SWIFT MW …
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Using MODFLOW to Predict Impacts of Groundwater Pumpage to Instream Flow: Upper Kittitas County, Washington
… use. The United States Geological Survey (USGS) has already created a basin-wide model for the Yakima River Basin for the period October 1959 through September 2001; however, the hydrogeology of Upper Kittitas County is coarsely represented in the USGS model because individual bedrock units …
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Identifying A Mechanism For An Infiltration Threshold From The Sunflower River, Ms To The Underlying Alluvial Aquifer
… level and stream stage measurements at a USGS coupled groundwater stream-gaging station located on the Sunflower River in Sunflower, MS show an apparent stage-threshold for infiltration to the underlying alluvial aquifer. This site is located near the center of a large regional groundwater …
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The Effect of Faults upon Ground Water Flow in the Baton Rouge Fault System
… analysis. This work has been done using the USGS model "MOCDENSE", a density-driven 2-D fluid flow. Five different scenarios have been developed. Chemical analysis has been done using available USGS data sources and data collected by Professor Stoessell. Modeling indicates that the fault can …
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Analyses of groundwater contribution to a riverine wetland
… State Park in Manalapan, New Jersey. Using USGS MODFLOW, a simulation is adapted to the site specific conditions of geology (from in-situ permeability tests), topography (from surveyed elevations and also USGS Topo Map) and vegetation (by assigning different evapotranspiration coefficients …
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