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Showing 1 to 20 of 96 for “"levee"”.
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Using Geophysics To Evaluate Levee Stability
… along the river \side slope of Mississippi River Levees for over sixty years. Shallow slough slides also occur along smaller levees that protect tributaries of the Mississippi River. This investigation takes place along a section of the Coldwater River Levee, a tributary levee of the Mississippi …
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TREE ROOT ENCROACHMENT ON LEVEE DRAINAGE SYSTEM
… on the drainage facilities associated with the levees along the middle Rio Grande (MRG), and to suggest an appropriate drainage design. This study consists of three research elements: (1) GIS-based analysis in estimating root distribution along levees, (2) a bench-top experiment, and (3) …
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Levee Breach by Overtopping: The Effects of Soil Properties
<p>Levees are constructed for protecting infrastructure, croplands and cities from seasonal floods of low land rivers. Most levees are constructed from earthen materials. Also known as earthen embankments, these levees may fail by overtopping, when flood levels exceed design floods. Past studies …
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Experimental Investigation of Steady Flows at a Breached Levee
<p>Steady flow at a breached levee is studied in this dissertation through a generalized model and a case study. The generalized experimental set-up consists of a main channel with an opening in its side wall and an adjustable sluice gate at its downstream end. Water surface elevation and the …
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A GIS-Based Strategy for Managing Levee Simulation Data
… and improving the state of the nation's levees has become a national priority following the devastating events surrounding Hurricanes Katrina and Rita. Federal legislation passed in 2007 created a new national Committee on Levee Safety and spurred the development of the National Levee …
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Experimental and Numerical Modeling of Dam-Break and Levee-Breach Flows
… and numerical studies on dam-break and levee-breach flows. Experiments were conducted to gather comprehensive data on a steady levee-breach flow in an urban area and on unsteady 2-D and 3-D dam-break flows. Numerical studies of dam-break flows were carried out using Reynolds-averaged …
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Levee Stabilization Design for Flood Control in East Grand Forks, Minnesota
… investigates stabilization methods for a failing levee system using the method of slices. An assumed failure surface was drawn and divided into vertical slices, where the forces acting on each slice were analyzed. If the forces available to resist movement were greater than the forces driving …
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Use of Georphysics to Map Subsurface Features at Levee Seepage Locaitons
… seepage and piping along the Mississippi River levees in Northwest Mississippi. The aim of this thesis was to implement geophysical techniques at two seepage locations in order to give a better understanding of the causes of underseepage and information on how to mitigate the problem. Sites near …
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Reanalysis of the settlement of a levee on soft bay mud
… of the New Hamilton Partnership (NHP) levee in Novato, California. This 11ft high levee was constructed over 30 ft - 40 ft thick layer of San Francisco Bay Mud during a six-month period in 1996. Settlements along the levee crest were monitored over a period of 5.2 years after the end of …
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Maximum Levee Height as a Function of Red River Valley Foundation Sediments
… This design project focuses on determining levee height safely supported in this geologic setting. Maximum levee height above the most unsuitable foundation materials was determined using two modifications of Terzaghi's Ultimate Bearing Capacity Equation. Allowable levee heights with desired …
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Levee Analysis and Design for Proposed Missouri Refining Co. Petroleum Refinery Site.
… to cover the design and construction of a levee around the proposed Missouri Refining Co. petroleum refinery, see Figure 1 for location. The location is near the confluence of the Yellowstone and Missouri Rivers in Williams County, North Dakota. The recent success in extracting …
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Examination of the impact of the natural environment on levee sustainability, An
Artificially constructed levees provide a series of valuable services including flood protection, tidal protection, and fresh water storage. Extending the life and status of levees reduces the potential for levee failures and enhances their benefits. The objective of this study was to improve our …
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Dynamic Analysis of Levee Infrastructure Failure Risk: A Framework for Enhanced Critical Infrastructure Management
… risk associated with an existing network of levees in New Orleans due to diverse infrastructure management investments. Although, the framework and RiskDIMS are discussed here in the context of levees, the concept applies to other critical infrastructure assets and systems. This research aims …
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Characterizing Variable Flow Pathways And Geochemical History Of Seepage Under The Mississippi River Levee: 2011, 2015, And 2016 Floods
Seepage beneath levees during flood stage becomes a concern when piping occurs, creating channels beneath the levee and forming sand boils where transported sediments discharge. Along the lower Mississippi River, pathways beneath the levee vary with surface geology, following deeper paths where the …
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Morphological filters in floodplain for DEM-extracted data – using Minimum Bounding Circle & Youden Index
… initiatives. As the first defense line, levees provide protection from temporary flooding (Makhdoom, 2013). These embankments are broadly classified according to the areas they protect, which could either be urban or agricultural levees within floodplains. In the U.S., most of the levees …
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