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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 63 for “"Sediment yield"”.
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Monitoring and modelling hydrological response and sediment yield in a North York Moors catchment : an assessment of predictive uncertainty in a coupled hydrological-sediment yield model
A fully distributed coupled hydrological-sediment yield model was developed. An assessment was made of the predictive uncertainty in the individual model predictions, as well as the uncertainty propagated from the primary hydrological model to the secondary sediment yield model, using the …
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An Improved Water-Driven Sediment Yield Model for Cold Agricultural Regions
Excessive transport of sediment in the world’s freshwater, typically from water-driven erosion occurring in agricultural regions, is a significant source of pollution and damage to the aquatic environment. Excess sediment erosion promotes the transport of phosphorus to lakes, which can increase …
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A Water Balance and Sediment Yield Analysis Model for the Lopez Lake Reservoir
… Avila Beach. In this study, a water balance and sediment yield analysis model was developed for the reservoir’s watershed. The model was used to estimate evaporation from the lake and to examine the effects of a wildfire on the reservoir. Evaporation and wildfire are dependent on variables that …
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Coupled Sediment Yield And Sediment Transport Model To Support Navigation Planning In Northeast Brazil
<p>Deposition of sediment (shoaling) in commercial waterways is a major obstacle to maintaining sustainable riverine transportation of bulk goods (primarily agricultural and mining commodities). The rate of aggradation of sediment in a waterway is directly related to both the rate of sediment …
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Systems analysis of runoff and sediment yield from a watershed using a simulation model
… selection of a model that will simulate runoff, sediment yield, and channel characteristics such as bed material or cross section changes, from complex, ungaged watersheds containing various crops, soil types, slopes, channel sizes, levels of conservation management and, instream erosion control …
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Applying the RUSLE and SEDD Equations to an Agricultural Watershed in Southwest Virginia - A Case Study in Sediment Yield Estimation Using GIS
… estimate the source and quantity of accumulated sediment in the Emory & Henry College (EHC) duck pond. Located in the Highlands of Southwest Virginia, the 1,194 acre duck pond watershed consists primarily of agricultural, forested, and low density urban land uses. The Revised Universal Soil Loss …
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Modeling Best Management Practices on Flow and Sediment using the Rangeland Hydrology and Erosion Model
… impacts of best management practices on sediment yield and runoff in order to help mitigate negative effects of erosion and sedimentation on soil vegetation productivity and water quality. This study used the Rangeland Hydrology and Erosion Model (RHEM) to evaluate best management …
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Modeling the Impacts of Rangeland Management Practices on Flow and Sediment Using SWAT
… model was used in the estimation of flow and sediment yield on a daily time step to evaluate the water quality improvements achieved through the implementation of best management practices (BMPs) in Ash Creek. Ash Creek is a small un-gauged watershed located in western South Dakota and is a …
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Geospatial analysis of specific degradation in South Korea
… Korea experienced many local and concentrated sediment problems such as landslides, upland erosion, rills and valleys, aggradation/degradation, and flood plain sediment deposition. These problems vary in space and time, therefore a reliable and consistent approach to model sediment processes is …
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Suspended Sediment Transport Dynamics and Sediment Yields in Relation to Watershed Characteristics, Upper Green River Basin, Kentucky
Sediment delivery is a major problem in the Green River, Kentucky, home of 71 of the state’s 103 known mussel species and 151 fish species. The river also provides water for many of its surrounding counties. This research focuses on how suspended sediment loads, grain size, and sediment …
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Application of a nonpoint source pollution model to a small watershed in Virginia
… pollution model, was selected to stimulate sediment yield and chemical loadings from Owl Run watershed. The model was validated to demonstrate its applicability to Virginia Piedmont conditions. The validation was carried out by comparing simulation results with measured data including …
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Simulating the Soil Erosion from Land Removed from CRP
… in this study for this purpose. Runoff and sediment yield data from a continuous com field in Brookings, South Dakota were used to calibrate the model. Data collection took place during frost free season of 2009. To determine hillslope and channel networks in the watershed GeoWEPP and ArcMap …
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Optimizing the management of soil erosion using GIS
… was used for land-use optimization to minimize sediment yield and maximize watershed farm income by a multi-objective linear programming model. These models were applied to Syahrood, one of the sub-basins of Damavand watershed in Iran, where soil erosion by water is one of the major land-related …
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Particle labeling for sediment source tracking on hillslopes
… process, which evolves temporally and spatially. Sediment source tracking can be used to identify the areas within a watershed where erosion is greatest. This study evaluated three sediment source tracking techniques, rare earth element (REE) particle labeling, interrupted rills, and ground based …
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Assessment of Sediment and Salinity in the Lower Mekong River Basin
… concerns like nutrient deficiency from sediment and saltwater intrusion. The decrease in sediment deposition in the Mekong basin is caused by a number of factors. In China, Lao PDR, and Vietnam, the hydropower generation from dams has improved people's overall living standards, leading …
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A systems approach to evaluate water quality oriented land management plans
… Hydrograph Model (FESHM) to simulate runoff and sediment yield from a series of design storms with known return periods. The design storm simulations were the basis for sediment distributions representing unique cropland areas and management practices. The distributions were evaluated to obtain …
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Assessing the dynamics of soil erosion and sediment transport under increasing land use pressures in East African Rift Catchments
… land use and land cover change, soil erosion and sediment transport in East African Rift Catchments. This contribution forms a blueprint for future studies using sediment tracing, radionuclide dating, Bayesian Mixing Models and soil erosion mapping, and their reciprocal integration in this …
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A GIS-Based Watershed Impact Management Model
… contributor to increased runoff and water yield. Incorporation of best management practices (BMPS) in scenario b resulted in a significant reduction of sediment yield and nutrient load. However, no changes were evident in groundwater nitrate loading despite the addition of BMPS. The …
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Hydrological responses to the synergistic changes in climate and land cover in the alpine pastoral region
… land use and future climate. Consequently, sediment yield rises by 5.0 %, 17.9 %, and 25.9 % under scenarios 2, 3, and 4, respectively, as compared to scenario 1. The results indicate that the transition from pasture to cropland has been the topmost contributor to the increase in runoff and …
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