Global ETD Search
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 593 for “"watersheds"”.
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Time Distribution of Runoff From Watersheds
Made available in DSpace on 2014-12-08T23:56:39Z (GMT). No. of bitstreams: 1 6612344.pdf: 4239816 bytes, checksum: d59e166453e2b528e6faec6d8babc314 (MD5) Previous issue date: 1966
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Water quality hydrology on surface mined watersheds
Water quality and discharge on four watersheds disturbed by surface coal mining at the Edna Mine in northwestern Colorado have been monito red for about three years. Water quality and discharge have also been monitored in an adjacent stream at points above and below the entrance of mine drainage …
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Arc Hydro data model for Ethiopian watersheds
… (DEM) was created. Second, drainage lines and watersheds were created using the Arc Hydro tools. Third, six hydro administrative regions were identified based on the flow direction of the streams. This project has shown that Arc Hydro is an effective tool for storing and analyzing hydrologic …
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Hydrologic Analysis of Watersheds as Stochastic Systems
Made available in DSpace on 2014-12-08T23:57:13Z (GMT). No. of bitstreams: 1 6910822.pdf: 4498506 bytes, checksum: 1c7ff41865c8e3f9b2cce95e91735c3f (MD5) Previous issue date: 1968
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A synthetic unit sedimentgraph for ungaged watersheds
… deriving unit sediment graphs for ungauged small watersheds is not available. Based on synthetic principles as well as linear and time-invariant principles, applied to the systems approach of hydrology, a synthetic model has been developed to derive the unit sediment graph and to generate the …
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Tracing carbon flows through Arctic and alpine watersheds
… surface and hyporheic water samples from two watersheds varying in channel complexity (single-thread and multi-thread) at eight time points spanning the seasonal hydrograph. We found that connectivity across the terrestrial-aquatic interface was maximized during peak discharge and decreased …
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Flood hazard sensitivity on infrastructures in small ungauged watersheds
L'abstract è presente nell'allegato / the abstract is in the attachment
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Pluvial Flood Risk Estimation Procedure for Small Urban Watersheds
… and quantify pluvial flood risk for microwatersheds (watersheds of a few square miles or less). The model development was accomplished using EPA's SWMM in combination with GIS datasets and analyses. Sensitivity analyses were performed on many model inputs including runoff surface slope, …
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Attribution of phosphorus load in various watersheds in Illinois
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Simulation of Runoff and Pollutant Loss in Urbanizing Watersheds
… of urbanization on previously agricultural watersheds is an increasingly important issue for watershed planners. Urbanization increases runoff and pollutant loadings to the watershed outlet. Watershed planners in areas that previously had little impervious cover must now consider the effects …
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Estimating Bacterial Loadings to Surface Waters from Agricultural Watersheds
Fecal bacteria and pathogens are a major source of surface water impairment. In Virginia alone, approximately 73% of impaired waters are impaired due to fecal coliforms (FC). Because bacteria are a significant cause of water body impairment and existing bacterial models are predominantly based upon …
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Legacy Nutrient Management and Remediation in Diverse Agricultural Watersheds
… decades of conservation investment. In many watersheds, water quality impairments persist due to the accumulation of legacy nutrients—phosphorus (P) stored in soils and nitrogen (N) stored in groundwater—that continue to be mobilized long after management changes are implemented. This …
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Integrated Terrestrial and Hydrological Carbon Budgets in High Arctic Watersheds
… allowing the total losses of carbon from the watersheds to be calculated, and the relative importance of the different types of carbon fluxes to be compared. The watersheds were net sources of carbon to the atmosphere during the growing season, with terrestrial CO2 emissions overwhelmingly …
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Incipient Speciation in Freshwater Fish Species from Two Isolated Watersheds
… Mill Rivers now exist in separate but parallel watersheds.</p> <p>The main focus of this research was to decipher if there is evidence of incipient speciation between freshwater fish populations that reside in two isolated river systems: the Bronx and Saw Mill Rivers that have been separated …
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Hydrological Drought Analysis for Seven North Georgia Watersheds (1970-2000)
… in significant effects on local ecosystems, watersheds, and water sources, with the potential to have negative impacts on human populations. Normalized indexes can be used to characterize drought magnitudes and frequencies using historical data records on temperature, rainfall, snowpack, soil …
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Data-driven analyses of watersheds as coupled human-nature systems
… continue to increase, we can expect that all watersheds will change during the foreseeable future. Interactions between climate change and human activity drive non-stationary trends in the hydrologic cycle, which make watersheds more difficult to manage. In the 21st century, successful …
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Predictability and trends of annual pollutant loads in Midwestern watersheds
… (nutrient and sediment) export from large scale watersheds. To enable these goals, this research is centered on large watersheds in Midwestern United States, which have been some of the primary sources of nutrient and sediment export to downstream water bodies such as the Gulf of Mexico and Lake …
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Modeling nitrate in tile-drained watersheds of east-central Illinois
… due to the agricultural nature of their watersheds. Field tile systems provide direct links between leached nitrate and surface drainage systems. The purpose of this study was to develop a model for predicting flow and nitrate loading in a surface drainage ditch at the outlet of a …
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