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Author:
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 328
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Book Description
Author:
Publisher:
ISBN:
Category : Groundwater
Languages : en
Pages : 328
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Author: Waterways Experiment Station (U.S.)
Publisher:
ISBN:
Category : Drainage
Languages : en
Pages : 258
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Book Description
Author: U.S. Army Engineer Waterways Experiment Station
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ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: United States. Mississippi River Commission
Publisher:
ISBN:
Category : Relief wells
Languages : en
Pages : 94
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Book Description
Author: Waterways Experiment Station (U.S.)
Publisher:
ISBN:
Category : Mississippi River
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Levees
Languages : en
Pages : 148
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Book Description
Author:
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ISBN:
Category : Levees
Languages : en
Pages : 0
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Book Description
Author:
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ISBN:
Category :
Languages : en
Pages : 52
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Book Description
The Federal Government through the U.S. Army Corps of Engineers (USACE) has a large investment in flood-control levees. Where such levees are built on pervious foundations, seepage beneath the levee (underseepage) during floods can produce pressure and flow conditions capable of initiating subsurface erosion leading to levee failure. Two adverse phenomena may occur; one is sand boils which involves the movement of subsurface sand to the surface by flowing water, and the other is heaving which involves the upward movement of a relatively impervious surface layer resulting from subsurface water pressures in excess of its weight. To prevent such occurrences, the USACE has developed a set of procedures to analyze underseepage conditions on a site-specific basis and a set of procedures to design underseepage control measures. For the most part, these procedures were developed in the 194Os and 1950s. Intensive construction of control measures was accomplished in the 195Os and l96Os. Several moderately large and major floods have provided data from which the validity of the procedures and the security of the constructed system can be inferred. Also, since the 195Os many technical advancements have been made in engineering analysis techniques and construction methods that may merit application to underseepage problems.
Author:
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ISBN:
Category :
Languages : en
Pages : 498
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Book Description
The studies and data presented in this report are the result of the combined efforts of the Memphis, Vicksburg, and New Orleans Districts and the Waterways Experiment Station, under the general direction of the Mississippi River Commission. These studies have included a review and compilation of all underseepage reports made during and since the 1937 high water; exploration and geological studies of numerous sites where underseepage was a serious problem in 1937; installation of piezometers at selected sites to measure substratum pressures beneath and landward of levees; field pumping tests to determine the permeability of the sand aquifer at certain sites; theoretical, electrical- analogy, sand model, and prototype studies of relief wells, partial cutoffs, and landside berms for the control of underseepage; and observation and measurement of natural seepage at certain locations during the 1950 high water.
