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Showing 1 to 11 of 11 for “"sediment transport modeling"”.
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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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Three-Dimensional Numerical Modeling Of Multiple-Sized Sediment Transport Modeling Under Current And Waves
… numerical model of multiple-sized sediment transport under current and waves is developed. The coastal circulations are described by a three-dimensional hydrodynamic model, which is governed by the three-dimensional phase-averaged shallow water flow equations coupled with wave …
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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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Modeling the Biogenic Effects of Freshwater Mollusks on Bedload Transport and Dynamics in a Gravel-Bedded Stream
Application of physical modeling in relation to the influence of ecosystem engineers such as the freshwater mussel has been a common source of interest in ecohydrogeomorphic literature, limited by methods and complexity of application. This thesis investigates the influence of biogenic variables on …
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Hydraulic Modeling of a River Network for Predicting Flood Inundation using HEC-RAS and GIS Models - A Case Study in Southern Virginia
… characteristics of the modeled river on the sediment transport process is examined. This characterization is intended to provide a better understanding of a subsequent sediment transport modeling effort to be performed under severe flooding conditions.
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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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Environmental drivers of coastal evolution
… is shaped by the processes that influence sediment transport at coastlines. The present morphology, sedimentology, and distribution of modern coastal landforms reflect the influence of Holocene environmental processes that have altered the availability and movement of sediment at the coast. …
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Analysis of sediment dynamics in intensively managed landscapes
The flux of fine sediment within agricultural watersheds is an important factor determining the environmental quality of streams and rivers. Human activity has significantly altered the hydrological and biogeochemical cycles within terrestrial and aquatic environments through agricultural …
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Experiments on the Transformation of Mud Flocs in Turbulent Suspensions
… one of the most crucial parameters influencing sediment transport modeling. A series of laboratory experiments were conducted to examine the impact of suspended sediment concentration, mixes of clay and silt, and resuspension process to equilibrium floc size and floc settling velocity. In order …
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Improving Turbidity-Based Estimates of Suspended Sediment Concentrations and Loads
As the impacts of human activities increase sediment transport by aquatic systems the need to accurately quantify this transport becomes paramount. Turbidity is recognized as an effective tool for monitoring suspended sediments in aquatic systems, and with recent technological advances turbidity …
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Analysis and modeling of hurricane impacts on a coastal Louisiana lake bottom
… using direct lines of evidence and numerical modeling. Using side-scan sonar, CHIRP subbottom and echo sounder bathymetric profiles, the lake bottom and shallow subsurface of Sister Lake was imaged pre- and post-Hurricanes Katrina and Rita to provide a geologic framework for assessing the …