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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 16 of 16 for “"channel erosion"”.
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Channel erosion projections for threatened Alaska-Native communities along the Kuskokwim River
… are regularly threatened by ongoing riverbank erosion, including catastrophic events. Erosion is causing the river to encroach on AN villages, threatening infrastructure and community sustainability. Current trends in precipitation and warming in the Arctic indicate that the magnitude and …
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Urban Channel Erosion Quantification in Upland Coastal Zone Streams of Virginia, USA
To quantify sediment contributions due to urban channel enlargement, 50 study sites were selected on 1st- through 3rd-order streams, in watersheds with varying levels of urbanization, in two Physiographic Regions (Coastal Plain and Piedmont), and in the Coastal Zone Management Area of Virginia. At …
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Using Bioretention Retrofits to Achieve the Goals of Virginia's New Stormwater Management Regulations
… of the pre-development Q*RV to protect against channel erosion. This study models different bioretention cell sizes in a developed watershed in Blacksburg, Virginia to determine the "performance" at both the sub-watershed and watershed levels. In addition, models of "optimal" bioretention cells …
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Impacts of Stormwater Management Practices and Climate Change on Flow Regime and Channel Stability
… water. This increase in runoff contributes to channel erosion. While extensive research exists on the hydrologic benefits of various types of stormwater control measures (SCMs), the relationship between urbanization, widespread SCM implementation, and channel stability in headwater streams …
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Suspended sediment erosion in laboratory flume experiments
… role of suspended sediment abrasion in bedrock channel erosion. A range of topographies was used, from a planar bed to a sinuous and scalloped inner channel. Experiments were run separately with bedload (used to form topography) and suspended load at a variety of water flows and sediment fluxes. …
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Fluvial bedrock abrasion by bedload : process and form
Bedrock channels are a key component of the landscape. Pluvial bedrock incision sets the local base level, the boundary condition for hill slope processes, transmits tectonic and climatic signals throughout the landscape and transports sediments to sedimentary basins. Bedrock river networks are …
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Predicting Sediment Detachment and Channel Scour in the Process-Based Planning Model ANSWERS-2000
… improved interrill detachment subroutine, and a channel scour subroutine. The existing version of ANSWERS-2000 did not simulate channel scour. The original detachment equations used in the model were developed through regression analysis of data from a northeast Indiana watershed, and were not …
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Riparian resilience in the face of interacting disturbances: understanding complex interactions between wildfire, erosion, and beaver (Castor canadensis) in grazed dryland riparian systems of low order streams in North Central Washington State, USA
… between largescale wildfire impact, subsequent erosion events and dam building beaver populations in riparian systems of the Methow River watershed, north central Washington (WA), US. I tested the hypothesis that beaver increase the resiliency of streams to wildfire using a fully factorial study …
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Short-term response of a mountain stream to a sediment pulse and a major flood
… understanding of bed changes within the wetted channel. I found that, like other studies of sediment pulses, the channel bed reacted by fining substantially. However, even though I detected some substantial channel changes, the study stream did not experience massive aggradation or …
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Late Paleogene (Eocene to Oligocene) paleoceanography of the northern North Atlantic
… the Norwegian-Greenland Sea and Faeroe-Shetland Channel. Erosion and current-controlled sedimentation continued through the Oligocene; however, above reflector R3 (middle to upper Oligocene), the intensity of abyssal currents decreased. Above reflector R2 (upper lower Miocene) current-controlled …
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The geomorphological behaviour of a snow-fed, semi-arid gully system in western Colorado
… is hypothesised that the distinctive downstream erosion pattern described by the surveys may be explained in terms of the sediment transfer capabilities of the two asymmetrical hydrological process Intensity domains' routed into the channel phase. Frequency-weighted runoff models for melt and …
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Modeling Channel Degradation at the Watershed Scale: A Comparison of GWLF, SWAT, and CONCEPTS
… research efforts have focused on controlling erosion sources in agricultural and urban land areas. New research suggests major contributions to overall sediment loads may be due to stream channel degradation. Monitoring and modeling techniques to assess the contribution of channel sediment to …
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Satellite Remote Sensing of Suspended Sediment Concentrations in Turbid Rivers
… sources, effects of reservoir trapping and channel erosion/deposition as well as monitoring illegal sand dredging in river channels. In addition, the current research found that developed regression relations could be used to estimate SSC from time-series satellite images that were acquired …
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A combined field analysis and modeling approach for assessing the impact of groundwater pumping on streamflow
… aquifers impacts contaminant transport rates, channel erosion and sedimentation, nutrient loading, and aquatic and riparian habitat. Quantifying the interactions between stream water and groundwater is also critically important in regions where surface water and tributary groundwater are …
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Evaluating the impacts of urbanization and stormwater management practices on stream response
… frequency, and duration of flow in stream channels. These flow regime changes often alter the quality of aquatic habitats and native biota of streams. Identification of linkages between urban land use policies and practices and the associated geomorphic and ecological consequences in urban …
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Morphodynamics of large anabranching rivers : the case of the Madeira River, Brazil
Anabranching channels are the dominant channel pattern of large rivers worldwide. The top nine largest rivers of the world by water discharge, in particular, all develop anabranching channels. Given the limited understanding on large river morphodynamics and the mechanisms of formation and process …