Global ETD Search
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Showing 1 to 20 of 23 for “"Suspended Sediment Transport"”.
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Velocity profiles and suspended sediment transport in wave-current flows
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1993.
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Atrazine Contamination and Suspended Sediment Transport within Logsdon River, Mammoth Cave, Kentucky
… the potential for karst aquifer contamination by sediment-sorbed pesticides is important for cave conservation efforts in agricultural landscapes. Flow rate, water quality parameters and suspended sediment concentrations were measured in Logsdon River, a ~10km karst conduit within the Turnhole …
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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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Post-fire Response of Little Creek Watershed: Evaluation of Change in Sediment Production and Suspended Sediment Transport
… was assessed to identify changes in event-based suspended sediment export and determine the factors contributing to sediment production the first year following the Lockheed Fire in 2009. The amount and volume of near-stream sediment sources were found to decrease, while an increase in hillslope …
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High-resolution numerical investigation of hydrodynamics and sediment transport within emergent vegetation canopy
… of flow conditions within the array. Further, a suspended sediment transport model was developed in Nek5000 and was used to simulate suspended sediment transport within a patch of emergent rigid vegetation. The results were found to be in good agreement with the theory, making it probably one of …
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The role of aquatic vegetation on oscillatory flows and sediment transport
… morphological changes by modifying flow and sediment transport within and around vegetated regions. The lack of accurate suspended sediment predictors for vegetated oscillatory flows compromise our capabilities for the prediction of sediment transport rates. To fill this knowledge gap, we …
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The sedimentology and dynamics of mega-dunes, Jamuna river, Bangladesh
… to monitor bed morphology. Flow, turbulence and suspended sediment transport were investigated using an Acoustic Doppler Current Profiler (ADCP) which measured both the instantaneous three-dimensional velocity structure and the relative suspended sediment concentration for the entire flow column …
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Hydroclimatic influences on suspended sediment delivery in a small, High Arctic catchment
A study of suspended sediment transport dynamics was undertaken in the West River at Cape Bounty, Melville Island, Nunavut. Hydrometerological conditions and sediment transport were measured over three seasons in order to characterize suspended sediment transport and grain size characteristics in …
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Establishing an unambiguous connection between grain size and style of sediment transport in the Lower Niobrara River, Nebraska, USA
The transport of sediment is often separated into two components, bedload and suspended load. This division is important because bedload has a dominant control on channel morphology while suspended load dominates the formation of overbank deposits. Experimental data has related the style of …
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Turbulence and macro-turbulence in the bottom boundary layer downstream of large-scale bedforms; implications for sediment transport
… boundary layer (BBL) flow characteristics and on sediment transport are analysed in a natural shallow coastal site and in a laboratory flume. The main signature of flow/bedform interaction processes consists of large scale flow structures, generated downstream of the bedforms; these are …
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Bottom currents and abyssal sedimentation processes south of Iceland
… geologic effects of steady bottom currents on sediments of East Katla Ridge on the southern insular rise of Iceland. Near-bottom southwest to west-flowing currents exceeded 20 cm sec-1 for two weeks over a 25-kilometer wide section of the ridge flank between approximately 1400 and 1800 meters …
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Open-Channel Flow With Roughness Elements of Different Spanwise Aspect Ratios: Turbulence Structure and Numerical Modeling
… coherent events to the total turbulent momentum transport, etc. The characteristics and extent of the roughness sublayer and the inner region are also studied. Wall similarity arguments in the outer region have been tested as well, and results further compared to observations under different …
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SIMULATION OF POLLUTANT TRANSPORT RESPONSES TO LOADING AND WEATHER VARIATIONS IN LAKE ST. CLAIR AND THE CONNECTING CHANNELS.
… framework which can be used to simulate the transport of toxic and conventional substances in surface waters for the Huron-Erie corridor of the Great Lakes. In simulating the transport of conventional pollutants in the rivers, a simple hydrodynamic submodel, which includes flow around …
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Geomorphic and Fluvial Response to Recent Permafrost Disturbances in a High Arctic River, Cape Bounty, Nunavut
Using a sediment budget approach, suspended sediment transport dynamics were studied over the 2010 summer runoff season in the 8 km2 West River catchment at the Cape Bounty Arctic Watershed Observatory (CBAWO), Melville Island, Nunavut. Research was carried out in an effort to determine the longer …
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A CONTINUUM MIXTURE THEORY APPROACH TO SEDIMENT TRANSPORT WITH APPLICATION TO TURBULENT OSCILLATORY BOUNDARY LAYERS
Two aspects of the modelling of suspended sediment transport are investigated. One is the development of a theoretical base for sediment transport models starting from the continuum theory of immiscible mixtures (also know as two-phase flow theories). The other is a comparison with experimental …
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Effects of sedimentation on reservoirs in the Mushibemba catchment, Mkushi Farm Block, Central Zambia
Sedimentation is one of the problems that affects the storage capacity of most small reservoirs, and if not addressed on time, may lead to the dams being filled up with sediment and failing to meet the intended objective of providing agricultural water for food and economic security. The aim of …
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Effects of sedimentation on reservoirs in the Mushibemba catchment, Mkushi Farm Block, Central Zambia
Sedimentation is one of the problems that affects the storage capacity of most small reservoirs, and if not addressed on time, may lead to the dams being filled up with sediment and failing to meet the intended objective of providing agricultural water for food and economic security. The aim of …
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Advanced Suspended Sediment Sampling and Simulation of Sediment Pulses to Better Predict Fluvial Geomorphic Change in River Networks
Sediment, an integral part of rivers and watersheds, is eroded from, stored in, and transported through various watershed components. Rivers often receive sediment in the form of episodic, discrete pulses from a variety of natural and anthropogenic processes, this sediment can be transported …
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