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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 3134 for “"sediment"”.
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Downstream suspended sediment dynamics of reservoir sediment flushing
Reservoir sediment flushing is increasingly considered beneficial to reduce sedimentation of reservoirs and maintain sediment supply downstream of impounded rivers. Nevertheless, flushing of the accumulated sediments downstream of the dam also bears numerous negative impacts. In this study, first …
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Choreographing Sediment
In 2016 the Panama Canal expansion is set to open, allowing a new class of ships to call on east coast ports. The dredging involved in deepening navigation channels to ensure safe passage of these vessels will place an increased amount of pressure on containment facilities up and down the coast. …
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Hydrodynamic and sediment transport modeling of deltaic sediment processes
… bar and distributary channel formation and sediment transport on an adverse slope could be simulated with a 2D finite element sediment transport model. The models used were RMA2 and SED2D modules of the TABS-MD model suite. A finite element mesh of the lower Atchafalaya River and the delta …
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Sediment Oxygen Demand Kinetics
Hypolimnetic oxygen diffusers increase sediment oxygen demand (SOD) and, if not accounted for in design, can further exacerbate anoxic conditions. A study using extracted sediment cores, that included both field and laboratory experiments, was performed to investigate SOD kinetics in Carvin's Cove …
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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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Sediment transport in storm sewers
… into account the effect of roughness in the sediment transport in sewers. This model was later tested against experimental data obtained from a test rig. The rig had a pipe which was specially fabricated in two halves so that it could be divided to coat the interior with uniform sand grains …
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Bioavailability of sediment-sorbed fluorene
… of bioremediation processes to contaminated sediments. Sorption of pollutants may lead to the inability of microbes to come in contact with the compound. Studies presented herein investigate the biodegradation and desorption of fluorene, a 3 ringed polynuclear aromatic hydrocarbon (PAH), in …
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Sediment resuspension in Boston harbor
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1997.
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Sediment Dynamics in a Dryland River: Grain-Size Variations, Erosion Rates, Sediment Mixing and Dam Effects
… infrequent floods often set channel form and sediment grain size patterns for long periods of time. The large natural variability in dryland river stream flow causes susceptibility to geomorphic alteration when they are dammed. Cosmogenic nuclide analysis, a tool for determining catchment-wide …
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Sediment Dynamics in a Dryland River: Grain-Size Variations, Erosion Rates, Sediment Mixing and Dam Effects
… infrequent floods often set channel form and sediment grain size patterns for long periods of time. The large natural variability in dryland river stream flow causes susceptibility to geomorphic alteration when they are dammed. Cosmogenic nuclide analysis, a tool for determining catchment-wide …
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Mercury transport through a capped sediment
… for containing highly mercury-contaminated lake sediments and the resultant impacts on the mercury fate beneath the cap. Sand cap can delay and reduce the migration of mercury into the overlying water; however, due to the small partition coefficient of mercury between sand and water, a capping …
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Sediment geochemistry - a case study approach.
The geochemistry of sediments is a very wide field and several important aspects must be taken into account, including, but not limited to, various methodological questions, the analysis of distribution patterns, determination of origins and the assessment of risks. Therefore, this research project …
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Sediment resuspension in a shallow lake
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1987.
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Contaminated sediment transport in Boston Harbor
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1991.
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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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Exploring fine sediment dynamics and the uncertainties associated with sediment fingerprinting in the Nene river basin, UK
… and ecological status of freshwater bodies. Fine sediment has been shown to be a major cause of the degradation of lakes and rivers, and as a result research in geomorphology has been directed towards the understanding of fine sediment dynamics. It was identified by a review of published …
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