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Showing 1 to 10 of 10 for “"Dams And Levees"”.
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DESIGN METHODS FOR PRESSURE RELIEF WELL SYSTEMS AT DAMS AND LEVEES
<p>"Flood risk reduction structures such as dams and levees are important systems that provide significant benefits to the nation. Relief wells reduce the substratum water pressures that can compromise them via internal erosion. The U.S. Army Corps of Engineers (USACE) analytical method to design …
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Seismic Tomography for the Integrity Assessment of Earthen Dams and Levees.
Dams are a vital part of a nation's infrastructure. Considering the fact that many of the dams in the United States have approached or are approaching their projected life expectancy of 50 years, these critical infrastructures represent a risk to public safety. Minimizing this risk requires an …
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Integrity Assessment Of Earthen Dams And Levees Using Cross-Plot Analysis Of Seismic Refraction And Electrical Resistivity Tomograms
… provide a rapid, economical, non-invasive, and spatial coverage of the subsurface in terms of geophysical properties. On the other hand, geophysical methods can generate multiple geophysical anomalies. An anomaly on a seismic refraction or an electrical resistivity tomogram is an area that …
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Improving the economic evaluation of flood risk management studies
… infrastructure in the United States (U.S.) are dams and levees. The FRM infrastructure in the U.S. is aging with a large number of dams and levees now more than 50 years old and in need of restoration and modification. Furthermore, many of these FRM structures are vulnerable to the impacts of …
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Numerical Simulation of Unsteady Hydrodynamics in the Lower Mississippi River
Alterations along the Mississippi River, such as dams and levees, have greatly reduced the amount of freshwater and sediment that reaches the Louisiana coastal area. Several freshwater and sediment diversions have been proposed to combat the associated land loss problem. To aid in this restoration …
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Seepage induced instability in widely graded soils
… a soil is governed by a combination of geometric and hydromechanical constraints. Much concern exists for embankment dams and levees built using soils with a potential for internal instability. Migration of finer particles to a boundary where they can exit, by washing out, may cause erosion or …
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Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams
… is developed for investigating seepage and internal erosion in earthen dams with time-lapse measurements of self-potential anomalies associated with conservative salt and non-conservative heat tracer migration in the subsurface. The method allows for 1) detecting seepage zones in earthen …
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Finite Element Modeling of Seismic Wave Propagation in Earthen Embankments
… of internal seepage zones in embankments (dams and levees) by geophysical seismic techniques such as seismic refraction is limited by a number of factors. Some factors are associated with inversion and smoothing problems during processing, while others are associated with the natural …
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From Subsistence to Dependence: The Legacy of Reclamation and Allotment on Quechan Indian Lands, 1700-1940
… floodplain near the confluence of the Colorado and Gila rivers for more than 300 years. Since their southward migration to this area sometime in the seventeenth century, tribal members supported themselves through the adoption of a multifaceted subsistence strategy that incorporated cultivated …
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From Subsistence to Dependence: The Legacy of Reclamation and Allotment on Quechan Indian Lands, 1700-1940
… floodplain near the confluence of the Colorado and Gila rivers for more than 300 years. Since their southward migration to this area sometime in the seventeenth century, tribal members supported themselves through the adoption of a multifaceted subsistence strategy that incorporated cultivated …