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 76 for “"sediment load"”.
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Incipient motion of mixed sediment load on the Rio Chama
Discharge and sediment supply are the primary controls affecting the ability of rivers to adjust. When these are modified to manage water resources for human needs, the ecosystem that relied on them is often negatively impacted. The river that once knew a specific dynamic equilibrium is forced to …
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Simulating Anthropogenic and Climatic Influences On Fluvial Sediment Load In the Southeastern U.S. and Central Europe
<p>Quantifying variable riverine sediment discharge over time in response to climate and human pressure is crucial to understanding past, present and future patterns of sediment flux to the worlds' oceans. The need for this data is critical in light of changing anthropogenic activities, global …
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Impact of rainfall events on suspended sediment load and water quality and links to sediment management in Dzindi River Catchment
… the impact of rainfall events on suspended sediment concentration (SSC) and water quality and links to sediment management in Dzindi River Catchment, Limpopo Province. Rainfall events of different magnitudes and duration erode different sediment volumes resulting in significant variation in …
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Assessing the impacts of riparian land use on gully development and sediment load : a case study of Nzhelele River Valley, Limpopo Province, South Africa
… of different land uses to gully development and sediment load on the Nzhelele River Valley in the Limpopo Province. Data was collected using different methods such as observation, field data techniques and experiments. Satellite digital images, topographic maps, aerial photographs and 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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Comparing Two Methods for Developing Local Sediment TMDLs to Address Benthic Impairments
Excessive sedimentation is a leading cause of aquatic life use impairments in Virginia. As required by the Clean Water Act, a total maximum daily load (TMDL) must be developed for impaired waters. When developing a TMDL for aquatic life use impairment where sediment has been identified as the …
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Sources of suspended load in the upper Orange River, South Africa
… has been given to the source of its suspended sediment load. The source of the suspended load is important because it can provide insight into soil erosion, a major problem in South Africa and globally. In this study the composition of the suspended sediment load of upper Orange River …
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Assessing Efforts To Reduce Sediment Impacts In Cottonwood Creek, Blackfoot Basin, Montana
This thesis assesses efforts to reduce sediment impacts in Cottonwood Creek, a tributary to the Blackfoot River in western Montana. The first objective evaluated trade-offs in stream crossing improvements regarding short-term sediment impacts versus long-term reductions in sediment load from road …
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Assessing Efforts To Reduce Sediment Impacts In Cottonwood Creek, Blackfoot Basin, Montana
This thesis assesses efforts to reduce sediment impacts in Cottonwood Creek, a tributary to the Blackfoot River in western Montana. The first objective evaluated trade-offs in stream crossing improvements regarding short-term sediment impacts versus long-term reductions in sediment load from road …
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HYSTAR: Hydrology and Sediment Transport Simulation using Time-Area Method
… of this study was to develop a hydrology and sediment transport model capable of routing overland flow using a time-area concept and providing reliability of the modeling results in a probabilistic manner through uncertainty analysis. The HYSTAR (HYdrology and Sediment transport simulation …
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Timing and pattern of valley excavation, Le Sueur River, south-central Minnesota, USA
… excavation rate was compared with the modern sediment load, it was determined that the modern sediment load is 4-5 times greater than the average Holocene sediment load. This demonstrates that the post-settlement load is greater than the pre-settlement load and should guide the management of …
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An evaluation of particulate phosphorus storage in an agricultural estuary
Knowledge of fine sediment delivery (both timing and loading) is fundamental to the assessment of non-point source pollution in estuarine environments. This study comprised three key components that led to the development of a fine sediment and particulate associated phosphorus budget in a typical …
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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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Evaluating the role of market based policy instruments in managing trade-offs between ecosystem services supply and human welfare: case of Uluguru water catchment, Tanzania
… of water flowing downstream by reducing the sediment load by 13.21 % and by increasing social welfare measured as income per capita by 3.22 %. This is because such reduced sediment load will reduce the cost of producing portable water downstream by 4.33%. This is because tax cut on inputs …
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Novel Time-Integrated Quantification of Sediment-Associated Fecal Indicator Bacteria in Rural Alabama Creek with Straight Pipes
… fecal microbes are associated with the suspended sediment load has important implications for contamination transport. Current state guidelines require periodic grab sampling to monitor surface water fecal contamination. While technically simple, grab samples alone are inadequate to monitor …
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Terrestrial Laser Scanning for Quantifying Uncertainty in Fluvial Applications
… stream restoration design (SRD) and estimating sediment loads for total maximum daily load (TMDL) development. Surveying of stream morphology traditionally involves point measurement tools, such as total stations, or remote sensing technologies, such as aerial laser scanning (ALS), which have …
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Plan-view evolution of wave-dominated deltas
Ocean waves are a powerful sediment transport mechanism in the coastal zone. This thesis investigates how waves shape deltaic landforms and how small scale river mouth processes affect large-scale delta morphology. I have developed and applied models of plan-view delta shape and their channel …
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Plan-view evolution of wave-dominated deltas
Ocean waves are a powerful sediment transport mechanism in the coastal zone. This thesis investigates how waves shape deltaic landforms and how small scale river mouth processes affect large-scale delta morphology. I have developed and applied models of plan-view delta shape and their channel …
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Late Neogene Uplift of the Fairweather Ground on the Basis of Bathymetric and Seismic Data from the Gulf of Alaska
… climate change sequence with increasing rates of sedimentation (175 meters per million years to 4000 meters per million years). The foreland basin sediment load is deposited onto the Yakutat block, a microplate that takes up the strike-slip to convergent movement with respect to North America and …
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The Mississippi River Delta Basin and Why We are Failing to Save its Wetlands
… years or so, when the Mississippi River's sediment load lengthened and blocked the River’s route to the Gulf of Mexico, the mother stream changed course completely, finding a shorter route to the sea. Then, it built a new delta, thus spreading the gift of land creation along a wide …
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