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 21 for “"sediment management"”.
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Sediment Management for Aquatic Life Protection Under the Clean Water Act
Although sediment is a natural component of stream ecosystems, excess sediment presents a threat to natural freshwater ecosystems. Sediment management is complicated because sediment can be dissolved in the water column, suspended as particles in the water column, or rest on the bottom of the …
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Biophysical economic analysis of nutrient and sediment management practices in the Mississippi Alluvial Valley
… to increase row crop agriculture nutrient and sediment effluent loads. Best management practices help reduce row crop production environmental pollution. This dissertation looked at nutrient and tillage management practices that could help farmers address future total maximum daily loads …
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The Economics of Sediment Management Using an Aggregate Model of a Large Agricultural Watershed
… between farming decisions and the quantity of sediment delivered to the receiving surface water. The purpose for developing such a model is to combine it with an economic optimization model to enable analyses to pursue minimum cost land management strategies to control sediment.
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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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Learning for sustainable management of sedimentation in the Makoye reservoir in Monze east of Southern province,Zambia
Environmental issues such as sedimentation have accelerated due to increase in population and changes in land uses. This has made water managers to face complex technical challenges in managing water bodies. To address such environmental issues, the Global Action Program (GAP) by UNESCO (2014) …
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Learning for sustainable management of sedimentation in the Makoye reservoir in Monze east of Southern province,Zambia
Environmental issues such as sedimentation have accelerated due to increase in population and changes in land uses. This has made water managers to face complex technical challenges in managing water bodies. To address such environmental issues, the Global Action Program (GAP) by UNESCO (2014) …
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Reservoir sedimentation in dryland catchments : modelling and management
… strongly on storage in surface reservoirs and sediment deposition in these reservoirs affects adversely the water storage. In order to reproduce the complex behaviour of sediment deposition in reservoirs located in semi-arid environments and the effects of using sediment management techniques, …
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Experimental study of reservoir turbidity currents venting
… of their performance is threatened by sediment deposition within the impoundment. To achieve long-term sustainable performance of reservoirs, and to reach effective sediment management techniques, it is necessary to understand the characteristics of sediment and how it behaves before, …
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Improved dynamics modelling for drainage sediment prediction and management
… in this thesis aims to further knowledge of sediment behaviour and provides engineers with appropriate tools and methods to facilitate proactive sediment management. The techniques developed during this investigation are therefore able to predict the locations and quantities of sediment …
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Modeling the Effects of Low-Pressure Atmospheric Fronts on Sediment Transport through Mississippi Sound Barrier Island Inlets
<p>Coastal sediment dynamics in the Mississippi Sound are strongly influenced by tropical cyclones and the more frequent passage of low-pressure atmospheric fronts. While hurricanes are well recognized for reshaping barrier islands and altering sediment budgets, the cumulative role of recurrent …
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Why Are Some Watersheds More Sediment-Productive Than Others? An Explainable AI Approach
The Sediment Delivery Ratio (SDR) represents the proportion of eroded sediment within a watershed that ultimately reaches its outlet. Sediment yield (SY) is defined as the amount of sediment exported from a watershed outlet per unit time, normalized by drainage area. Quantifying the spatial …
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Evaluating sediment storage time for improved management of river basin pollution
Excess fine sediment supply and associated contaminants can have detrimental effects on water quality and river ecology, with sediment deposition on, and subsequent infiltration into, streambed substrate impacting riverine habitats. Significant research has assessed the magnitude, controls, and …
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Managing Flow, Sediment And Hydropower In The Mekong River Basin
… fraction of the 160 million metric tons of sediment annually transported by the river, thereby preventing the sediment from maintaining the basin's geomorphologic features, and from transporting the nutrients that support ecosystem productivity. This dissertation describes the development of …
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Multiscale environmental flow dynamics: particle settling, turbulence modulation, and tornadic vortices
… flows form the basis of processes that span sediment transport in rivers, drag reduction in pipelines, and the evolution of severe atmospheric vortices. Despite significant efforts to address related phenomena, a predictive, mechanistic description of how particles, non‑Newtonian carrier …
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Soil erosion and suspended sediment dynamics in intensive agricultural catchments
Excessive delivery of fine sediment from agricultural river catchments to aquatic ecosystems can degrade chemical water quality and ecological habitats. Management of accelerated soil losses and the transmission of sediment-associated agricultural pollutants, such as phosphorus, is required to …
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Seasonal Use of Missouri River Reservoir Deltas by Fishes
… While most reservoirs were designed to fill with sediment slowly, many have accumulated enough sediment to require management (i.e., removal of sediment by flushing, piping, or dredging). However, novel aquatic habitats have developed as a result of sedimentation (e.g., reservoir deltas), and …
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The development of dual signature, fluorescent magnetic sediment tracing technology
The erosion, transport and deposition of sediment create environmental problems and social issues worldwide. Due to these ecological, environmental and economic implications for society, the importance of protecting and managing the sediment and soil resource is increasingly recognised through …
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Evaluation of reactive cap sorbents for in-situ remediation of contaminated sediments
<p>Contaminated sediments can be treated using in-situ treatment methods that aim to either degrade or sequester contaminants, reducing their bioavailability. The main purpose of this research was to develop and evaluate a reactive capping mat that can be used for in-situ remediation of …
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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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The impact of run-of-river dams on channel morphology and sedimentation
… dams on river channel morphology and sediment characteristics upstream and downstream of four such structures in Illinois. Modeling of hydraulic conditions and flow competence for flows with different recurrence frequencies is also conducted to evaluate the effects of the dams on …
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