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Showing 1 to 20 of 74 for “"Sediment Concentration"”.
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Suspended sediment concentration in Alpine glacial meltwaters
Suspended sediment concentration in meltwaters draining from Alpine glaciers vary considerably both diurnally and seasonally. In order to characterise sediment variability, sub-daily close-interval sampling measurements of suspended sediment concentrations are usually undertaken. In close-interval …
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Evaluation of a Permittivity Sensor for Continuous Monitoring of Suspended Sediment Concentration
… the US Environmental Protection Agency (USEPA) sediment is a leading cause of water quality impairment (US EPA, 2002). The annual costs of sediment pollution in North America alone are estimated to range between $20 and $50 billion (Pimentel et al., 1995; Osterkamp et al, 1998, 2004). Due to the …
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Prediction of sedimentation and bank erosion due to the construction of Kahang Dam
… of tools for better understanding of the sediment dynamics and riverbank erosion downstream the dam will be of great benefit to researchers and policymakers. The present research employs the use of field techniques and estimation models to improve the (i) prediction of suspended sediment …
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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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Analysis of a Middle Pennsylvanian Channel Complex in Pikeville, Kentucky
… the sea-level was low, which resulted in a sediment bypass. Subsequently, an increasing sea-level was estimated from measurements of accommodation space. With rising sea-level and increasing accommodation space, the valley fill transitioned from a non-amalgamated to an amalgamated fluvial …
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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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Near-bed hydrodynamics and sediment transport in the swash zone
… coastal zone because of hydrodynamic and sediment transport processes that affect the morphology and ecology of the broader littoral area. The understanding of these swash-zone processes is poor and suffers from a lack of detailed measurements under natural conditions. A new comprehensive …
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Effect of self-stratification of sediment suspensions in turbulent plane Couette flow
… and breakup of lutoclines in tidal flows. Sediment delivered by rivers into sea spread on the continental shelves, and are resuspended by waves or tidal currents. The sediment concentration near the bottom can be enhanced to a fairly high level, and a sharp concentration gradient known as a …
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The Effective Viscosity of Ash-Laden Flows
… in the flow, along with other fine-grained sediment and increases the effective viscosity of the flow. The increase in effective viscosity decreases the settling velocity of the sediment within the flow, which in turn increases the bulk density of the flow. The increase in bulk density …
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The Effective Viscosity of Ash-Laden Flows
… in the flow, along with other fine-grained sediment and increases the effective viscosity of the flow. The increase in effective viscosity decreases the settling velocity of the sediment within the flow, which in turn increases the bulk density of the flow. The increase in bulk density …
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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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Development of testing protocols and evaluation methods for erosion and sediment control products
A study at the Erosion and Sediment Control Research and Training Center (ESCRTC) at the University of Illinois at Urbana-Champaign was conducted to develop testing protocols for ditch checks and erosion control blankets, as well as evaluate the products’ effectiveness as erosion and sediment …
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Effectiveness, cost, and implications of forest haul road stream crossing structures and best management practices in Virginia
… crossings have the potential to be sources of sediment from forest operations. Recent litigation has renewed interest in furthering research related to forest road Best Management Practices (BMPs). Three legacy (100 year old) forest road stream crossings were monitored for suspended sediment …
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Predicting suspended sediment in Illinois rivers using dimensionless rating curves
Suspended sediment concentrations in Illinois are a serious concern to the environment and navigability of Illinois rivers, the Mississippi River and the Gulf of Mexico. Therefore, understanding the amount of sediment in a river is important. Measuring the sediment, though, can be a lengthy, …
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Numerical study on internal flow structures of subaqueous density underflows and stratified open-channel flows
… describes an open-channel flow carrying sediment suspension, whereas the second and third configurations are used to investigate the flow structure of subaqueous density underflows. For each flow configurations, the internal flow structure is solved numerically using finite volume method …
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Impact of rainfall events on suspended sediment load and water quality and links to sediment management in Dzindi River Catchment
… the impact of rainfall events on suspended sediment concentration (SSC) and water quality and links to sediment management in Dzindi River Catchment, Limpopo Province. Rainfall events of different magnitudes and duration erode different sediment volumes resulting in significant variation in …
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In situ characterization of sediment oxygen demand across the spectrum of non-resuspension to full resuspension with varying bed shear stress
Sediment oxygen demand (SOD) can be a significant oxygen sink in various types of water bodies, particularly slow-moving waters with substantial organic sediment accumulation. In most settings where SOD is a concern, the prevailing hydraulic conditions are such that the impact of sediment …
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Mass balance modeling of polychlorinated biphenyls in the Lower Duwamish Waterway
… helps to determine the different sources and concentrations of PCBs within the Lower Duwamish Waterway to aid future remedial activities. There are four unknown state variables: freshness, suspended sediment concentration, dissolved phase total PCB concentration, and sorbed phase total PCB …
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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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