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Transient Seepage Analyses in Levee Engineering Practice

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Technical Report

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Geotechnical and Structures Laboratory, U.S. Army Engineer Research and Development Center Vicksburg United States

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This report is the first in a series of reports giving guidance and providing tools to practicing engineers on the proper use of transient seepage analysis using the finite element method. This report uses innovative analytical solutions and a cross section of a generic levee, common to the southeastern United States, to provide a basic introduction to properly performing transient seepage analyses. A comparison of the results obtained from well-known seepage computer programs for one-dimensional analytical solutions and the two-dimensional generic levee cross section is given.The soil property data and geometry data needed to perform a transient seepage analysis are discussed in detail. Advice on when a transient seepage solution is appropriate is given. Hydrographs that mimic typical floods are used in the transient analyses for the generic levee cross section. Procedures for comparing the results of different transient analyses, as well as comparing transient analyses to steady state analyses, are developed.

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