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 92 for “"sediment deposition"”.
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Sediment deposition in the lower Hudson River estuary
This study uses geophysical and sedimentological data collected from the Lower Hudson River estuary to identify the depositional response of the estuary to high river discharge events. Erosional and depositional environments in the estuary are identified through the use of side-scan sonar, bottom …
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Sediment deposition in the lower Hudson River estuary
Thesis (S.M. in Civil and Environmental Engineering)--Joint Program in Applied Ocean Physics and Engineering (Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering; and the Woods Hole Oceanographic Institution), 1999.
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Stochastic prediction of sediment deposition in the Mazar Reservoir
… was utilized to predict the water content and sediment deposition characteristics in the Mazar Reservoir in Ecuador. The results obtained were compared with those reported in the project's feasibility study. The methodology used in this study was based on the assumption that annual water inflow …
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Interactions among flow, sediment deposition and aquatic vegetation in a channel
… The first study investigates flow structure and deposition pattern associated with a long patch of vegetation located at the sidewall of a channel (i.e. a partially vegetated channel). Along the flow-parallel edge of the patch, a shear layer is formed due to the velocity difference between the …
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Sediment Deposition in the Deep Sea: from Seamounts to the Hadal Trenches
… by an additional food source originating from sediment resuspension. However, the mechanisms of resuspension at these depths remain uncertain.<br/>Two diverse environments with intermediate scale topographical features were studied: seamounts in the North Atlantic and Pacific hadal trenches …
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The impacts of metal-contamination and fine sediment deposition on benthic macroinvertebrate communities
To view the abstract, please see the full text of the document.
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Exploring Overbank Sediment Deposition Variation in Heavily Modified Floodplains of the Lower Mississippi River: A Sedimentological and Geophysical Analysis
… individual flood severity and duration, and sediment regime have become increasingly apparent and sometimes problematic, such as the 2011 and 2018-2020 floods. Flood control levees along the LMR have reduced the natural floodplain area by 70-90%, resulting in heavily restricted overbank …
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Investigation of the effect of a circular patch of vegetation on turbulence generation and sediment deposition using four case studies
This study describes the spatial distribution of sediment deposition in the wake of a circular patch of model vegetation and the effect of the patch on turbulence and mean flow. Two difference types pf vegetation were used along with two different stem densities totaling four different case …
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Investigation of the effect of a circular patch of vegetation on turbulence generation and sediment deposition using four case studies
This study describes the spatial distribution of sediment deposition in the wake of a circular patch of model vegetation and the effect of the patch on turbulence and mean flow. Two difference types pf vegetation were used along with two different stem densities totaling four different case …
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Real-time monitoring of scour and sediment deposition evolution at bridges and offshore wind turbine foundations based on soil electromagnetic properties
… for monitoring the evolution of scour and sediment re-deposition processes in the vicinity of foundation structures. The system employs two different devices in the Amplitude Domain (AD): an off-the-shelf and a new low-cost prototype sensor that yields an economical, accurate and robust …
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Corais e comunidades recifais e sua relação com a sedimentação no Banco dos Abrolhos, Brasil
The effects of terrigenous sediments upon coral reefs are major concern all over the world. The aim of this study is to evaluate coral communities at different sediment settings at the Abrolhos Bank. Most reefs closer to shore presented higher sediment deposition rates than reefs farther from …
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Water Flow and Sediment Texture as Co-Varying Submersed Aquatic Vegetation (SAV) Habitat Requirements
… study examined the importance of water flow and sediment texture as co-varying habitat parameters of submerged aquatic vegetation (SAV) in the Chesapeake Bay. An outdoor mesocosm experiment was conducted to test the response of SAV (Zostera marina and Ruppia maritima) to combinations of water …
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Recrutamento de corais recifais no Banco dos Abrolhos, Brasil
… and abundance of recruits, coral cover, and sediment deposition, among other variables, were investigated at six reefs. We recovered 140 plates with a total of 2,532 recruits identified. Brooders families had higher recruitment rates than broadcasters. Recruits were dominated by Poritidae …
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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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Spatial Distribution of Fine Sediment and Juvenile Freshwater Mussel Settling in the Gravel Bedded Dan River, North Carolina
Fine sediment plays an important role in the benthic habitat and water quality of gravel bed rivers. Fine particles, such as sand and silt, are often suspended in the channel but can settle into the bed during low flows. The deposition of these particles is dependent on the bathymetry of the river …
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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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Modeling the sorting of sediments on delta tops
Sediment sorting in fluvial rivers produces great variation in the grain-size of deposit over the length of a river. Knowledge of the pattern of sediment deposition may help to shed light on the processes that sort by grain size. A simple geometric model was developed to predict the location of the …
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Riparian vegetation and the soil seed bank five years after dam removal on the Elwha River, Washington
… associated disturbances, such as the release of sediment. Understanding how dam removal impacts downstream riparian vegetation is crucial as dam removal becomes more common. The Elwha River, Washington, is the location of the largest dam removals to date and provides an unprecedented opportunity …
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How do fine sediments and Hangman Creek discharge affect benthic macroinvertebrates in the Spokane River?
… causes of stream degradation globally is fine sediment deposition. Most fine sediment deposition in stream beds is generated by land use practices such as timber harvest, agriculture and urbanization. Hangman Creek is a major tributary and source of fine sediment to the Spokane River. Benthic …
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