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A steady-state two-dimensional unconfined flow through a homogeneous levee with a horizontal toe drain resting on an impervious base has been analyzed. Unlike in Kozeny’s method, the hydraulic resistance of the soil in a levee bounded by an equipotential parabolic surface and the straight upstream sloping face has been considered in the computation of the seepage and location of the phreatic line. The appropriate position of a filter in the levee is suggested to contain capillary rise well within the downstream sloping surface. The seepage through a zoned levee with an upstream rock fill part and a horizontal toe drain resting on an impervious base is also analyzed.
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Mishra et al. (2005) studied this question.
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