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Showing 1 to 20 of 319 for “"alluvial"”.
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The morphology of alluvial sand dunes
This Dissertation was approved for publication on 2021-04-15 at 12:04.
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Vertical Velocity Distributions in Sand -Bed Alluvial Rivers
Shear partition models of Einstein and Nelson-Smith were evaluated with the field data collected in this research. Einstein's method had an absolute average percent error of 11.3%, while the Nelson-Smith method had an absolute average percent error of 22.2% when the smaller bedforms were used as …
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Laboratory experiments on alluvial cover in mixed bedrock-alluvial meandering channels and on the formation and evolution of supraglacial meltwater meandering streams
… and across a broad range of scales. For example, alluvial rivers form and evolve by erosion and deposition of sediment, and by interactions with riparian vegetation. Meandering channels also form in bedrock where the driving processes include dissolution, abrasion by sediment particles, plucking …
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Sediment Control In Alluvial Rivers Using Simulation-Based Optimization
… optimization procedure to control sediment in alluvial rivers during extreme events based on the integration of sediment transport model with optimization approach. The aim of this study is to develop a decision making method which to minimize morphological changes in alluvial networks due to …
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Quarternary Alluvial Deposition in the Upper Green River Valley, Kentucky
This research describes the alluvial deposits and Quaternary geomorphic evolution of the Upper Green River in Kentucky by documenting the nature of flood plain sediments at two sites along the valley bottom of the Upper Green River between Mammoth Cave National Park and Green River Lake. Field …
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Aquifer Framework Restoration (AFR) in an Alluvial Aquifer, Central Texas.
The Brazos River Alluvium aquifer (BRAA) near Waco, Texas is an aquifer whose framework has been physically impacted by sand and gravel mining. The most productive portions of the BRAA framework are being excavated and kept as pit lakes or filled with different material. GIS identification of mined …
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Modeling Low Flow Hydraulics in Alluvial Channels (pools-Riffles, Open)
The investigation of the flow condition has become important in recent years as a means of determining critical levels of water pollution, aquatic habitat and instream flow needs. To assess these critical conditions, it is necessary to predict the hydraulic response of a river system to a given low …
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Characterising alluvial architecture using physical models, subsurface data and field analogues
… on braided river morphology and preserved alluvial architecture at both the channel-belt and within channel-belt scales. The prediction of inter-well alluvial architecture in the continental Barren Red Beds of the Upper Carboniferous, Lower Ketch Member, Southern North Sea, UK, presents …
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Denitrification and greenhouse gas emissions from cultivated and wetland alluvial soils
Agricultural development in the Mississippi River Basin has contributed to an 3-fold increase in NO3 loading of the river. Increased NO3 loading is a primary cause of eutrophication in the northern Gulf of Mexico. Identification of best management practices (BMPs) to reduce NO3 loss and wetlands …
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Alluvial cycles and early agricultural settlement phases in the Jordan Valley
… and common problems in dating and correlating alluvial sequences are discussed. Buried archaeological remains and radiometric dates provide a chronological framework for the sequence of Late Quaternary alluvial deposits in the central Jordan Rift. While previous studies emphasized a simple, …
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Evaluation of geophysical methods to characterize alluvial soils in the arid environment
Non-intrusive geophysical investigations, both seismic and electrical, were performed at several locations on the Las Vegas Springs Preserve in Las Vegas, Nevada, along with intrusive drilling. These investigations were conducted to determine whether it is possible use geophysical methods to detect …
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The edge effect: lateral habitat ecology of an alluvial river flood plain
… contribute significantly to the biocomplexity of alluvial floodplain ecosystems.
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The edge effect: lateral habitat ecology of an alluvial river flood plain
… contribute significantly to the biocomplexity of alluvial floodplain ecosystems.
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Hydrogeologic assessment of the Brazos River alluvial aquifer : Waco to Marlin, Texas.
The Brazos River alluvial aquifer is a shallow unconfined aquifer within the alluvial deposits along the Brazos River. The deposits include the floodplain and terrace material which are comprised of clay, silt, sand, and gravel. Thicknesses of the alluvial deposits range up to 80 feet. Groundwater …
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Evaluation of Linear and Nonlinear Concepts of Hydraulic Resistance in Alluvial Channels
… of research on hydraulic resistance in alluvial channels, a new set of equations has been proposed for the determination of the hydraulic resistance coefficient for alluvial channels with steady, reachwise uniform flow in equilibrium sediment transport. An analytical study based on …
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Climatic and Geomorphic Interactions on Alluvial Fans in the Atacama Desert, Chile
Alluvial fan surfaces in the Atacama Desert of northern Chile preserve evidence of recent, precipitation-driven, surface flows. Determining the hydrologic characteristics of these flows is important for understanding the effects of rare yet significant storms in the region. Flow reconstruction, …
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Application of electrokinetic remediation on contaminated alluvial soils in Sri Gading, Batu Pahat,
The research described in this thesis is a comprehensive account to remove excessive heavy metals and radionuclides contained in the most radiation-contaminated soil by using the most optimised electrokinetic remediation technique. This novel study that saved time and costs based on electrokinetic …
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Machine Learning methods for providing groundwater management insights in semi-arid alluvial aquifers
Accurate regional groundwater level (GWL) forecasting is critical for evaluating the impacts of groundwater withdrawals on water resource sustainability, especially during droughts. A lack of hydrogeological data often makes it challenging to develop water balance models that forecast the impacts …
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REMOTELY MAPPING SURFACE ROUGHNESS ON ALLUVIAL FANS: AN APPROACH FOR UNDERSTANDING DEPOSITIONAL PROCESSES
… and understand depositional processes on active, alluvial fan surfaces in Death Valley, CA. Surface roughness on the scales of grain size and topography on alluvial fan surfaces is expected to vary with depositional processes, including fluvial and mass movement events, as well as surface runoff …
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