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 47 for “"Suspended sediments"”.
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Mineralogy, Chemistry & Flux of Suspended Sediments in Himalayan Rivers
The flux and composition of river suspended sediments contain valuable information on processes including erosion rates, the composition of the eroded bed rocks, chemical weathering and sediment storage and sorting within river channels. In this thesis, samples from the Kosi River in Nepal (a major …
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Spatial Distribution of Suspended Sediments within the Chesapeake Bay Using Remote Sensing
… the natural color composite, browner shades of suspended sediment appear to represent river input sediment while coastal erosion sediment appears to be in a light green color. In the standard false color composite, green shades of suspended sediment coincide with the river input sediment, while …
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OIL SPILL CLEANUP BY HYDROPHOBIC SILICA AEROGELS AND SPILLED OIL INTERACTION WITH SUSPENDED SEDIMENTS
… measurements of settling velocities of sediments, flocs, and Oil-Sediment Aggregations (OSAs). Kaolin was used as the sedimentation source and two different hydrocarbons, diesel and motor oil, were selected as spilled oil. The experimental results indicate that the salinity is an …
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Modern sedimentation in the Northern Barents Sea : input, dipersal and deposition of suspended sediments from glacial meltwater
… are often observed indicating that fine grained sediments are being transported under present conditions. Minor additional sediment is supplied by iceberg rafting englacial material and sea-ice containing aeolian, resuspended, and beach sediments. Glacial flour is supplied by several large stable …
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Transport of the Herbicide Atrazine on Suspended Sediments During a Spring Storm Event in Mammoth Cave, Kentucky
… grassy and broad-leaf weeds in corn fields, on suspended sediments. Atrazine is a known carcinogen and endocrine disruptor and has been shown to be toxic at low environmental concentrations. Atrazine has the capacity to adsorb to soil particles, which in karst areas such as those found in south …
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Modern sedimentation in the Northern Barents Sea : input, dipersal and deposition of suspended sediments from glacial meltwater
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1985.
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Spatial and temporal analysis of heavy metals in surface waters, bed sediments and suspended sediments of the River Stour, East Kent, U.K.
… of metal enrichment in surface waters and bed sediments coincides mainly with areas of urbanisation and high density traffic in addition to point source discharges including STW and industrial effluent outlets. Non-tidal surface water samples exhibiting Pb, Co, Cu, Fe and Zn concentrations …
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Measurements Of Fluvial Sediments Using A Single-Frequency Acoustic Attenuation System
Suspended sediments are a global-scale pollutant that threaten the integrity of our waterways and pose an environmental threat to many aquatic ecosystems. Innovative techniques are required to continuously monitor this pollutant. Ultrasonic acoustic measurements have the potential to improve the …
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A study of aquatic sedimentation in Chattanooga, Tennessee, using GIS and remote sensing technology integrated with hydrodynamic and watershed models
Suspended sediments can have benefits and drawbacks on aquatic ecosystems depending on the concentrations. The need to quantitatively monitor water bodies and watersheds is key to reduce excessive suspended concentrations. This study aims to integrate remote sensing technology with numerical …
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Abundance and Distribution of Early Life Stage Blue Crabs (Callinectes sapidus) in Lake Pontchartrain
… data were analyzed to gain a large-scale view of suspended sediments patterns within Lake Pontchartrain and quantify water movement. Field sampling along with remote sensing proved to be beneficial when assessing estuarine-wide C. sapidus post-larval dispersal processes.
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The Effects of Seasonal Changes and Turbidity on Swimming Performance in White Crappie Pomoxis Annularis and Black Crappie Pomoxis Nigromaculatus.
… by the levels of turbidity in the form of suspended sediments. Black crappie predominate in clear bodies of water and exhibited significantly greater critical swimming speeds in clear water than did white crappie during spring days and winter nights. A significant reduction in critical …
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Vessel induced physical effects related to navigation changes on the Kanawha River, West Virginia
… on the calculated velocities, concentrations of suspended sediment induced by the disturbance are estimated, at the time of disturbance and after suspended sediments have been allowed to settle. Field data on tow induced velocity changes in a back channel and a tributary are also analyzed. The …
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The effects of common carp on zooplankton communities using morphological and molecular techniques
… communities of a shallow lake environment. Suspended sediments and nitrogen increased in the presence of carp. The zooplankton communities changed through time and were associated with small suspended sediments, but there was no observed influence on the zooplankton community driven by carp. …
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Improving Turbidity-Based Estimates of Suspended Sediment Concentrations and Loads
… recognized as an effective tool for monitoring suspended sediments in aquatic systems, and with recent technological advances turbidity can be measured in-situ remotely, continuously, and at much finer temporal scales than was previously possible. Although turbidity provides an improved method …
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Measuring and modeling suspended sediment and nutrient yields in a mixed-land use watershed of the central United States
… understand mixed-land-use contributions of suspended sediment and nutrient loads to receiving water bodies. Water samples were analyzed for suspended sediments and nutrients using a nested-scale experimental watershed study design (n=836 samples x 5 gauging sites) in an urbanizing mixed-land …
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Development of a fluvial oil-particle aggregate (OPA) drift simulator to evaluate the fate and transport of contaminated sediment in rivers
… by incorporating OPA formation algorithms from suspended sediments to an existing model that has the capability of transporting pre-formed OPA with a random walk scheme through unsteady HEC-RAS domains. For the sake of showing the importance of considering OPA formation, a range of parameters …
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Development of a rapid response riverine oil-particle-aggregate (OPA) formation, transport, and fate model
… rates enhancement due to greater amounts of suspended sediments. Additional work to extend to the practicality of the developed model was performed by linking the model to HEC-RAS, and the modified model was explored via an application to the Kalamazoo River.
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Sedimentary Dynamics and Water Quality in Floodplains of the Lower Mississippi River near Natchez, Mississippi, during the 2018 and 2019 Floods
… and adsorbed nutrients (N, P). Flood water and suspended sediment of the overbank water column were sampled during the 2019 flood (March and June), which included in situ measurements of temperature, pH, dissolved oxygen, and total dissolved solids. Suspended sediments in bottled samples were …
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Coastal meltwater plume detection and its response to melting variations around the Greenland Ice Sheet
… different characteristics of plumes containing suspended sediment in fjords retrieved from remote sensing. However, suspended sediments are not directly representative of meltwater leaving the ice sheet, and later in the melt season the meltwater may have a very low sediment load due to …
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Littoral wetlands and lake inflow dynamics
… systems, which efficiently remove nutrients, suspended sediments, metals and anthropogenic chemicals through sediment settling and various chemical and biological processes. This thesis tackles three interconnected aspects of wetland physics. The first is wetland circulation, which is one of …
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