TECHNICAL PAPERS
Jun 1, 1983

Exit Gradient in Anisotropic Porous Medium

Publication: Journal of Hydraulic Engineering
Volume 109, Issue 6

Abstract

The inclination of flow lines at the exit on the downstream side of a hydraulic structure has been found for a known degree of anisotropy and a given direction for the principal permeability. An analytical procedure is presented to find the exit gradient for steady confined flow in an anisotropic porous medium from known exit gradient of the corresponding fictitious isotropic flow domain. Results have been presented for distribution of exit gradient on the downstream side of a vertical sheet pile embedded in a homogeneous anisotropic porous medium of infinite depth. It is found that the zone vulnerable to piping on the downstream side of a vertical sheet pile is larger for the case of horizontal stratification than for vertical stratification.

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References

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Aravin, V. I., Melentev, V. A., and Pavlovskaya, L. N., “Effects of Anisotropic Permeability of Soils on the Seepage through Hydraulic‐Fill Dams,” Hydraulic Engineering Transactions, Ministry of Electrification of the USSR, Vol. 86, translated from Russian by the Israel Program for Scientific Translation, 1968, pp. 31–42.
2.
Boulton, N. S., “Analysis of Data from Pumping Tests in Unconfined Anisotropic Aquifer,” Journal of Hydrology, Vol. X, No. 4, 1970, pp. 369–378.
3.
Dagan, G., “A Method of Determining the Permeability and Effective Porosity of Unconfined Anisotropic Aquifers,” Water Resources Research, Vol. 3, No. 4, 1967, pp. 1059–1071.
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Mansur, C. I., and Dietrich, R. J., “Pumping Test to Determine Permeability Ratio,” Journal of the Soil Mechanics and Foundation Division, ASCE, Vol. 91, No. SM4, Proc. Paper 4415, Apr., 1965, pp. 151–183.
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Marcus, H., “The Permeability of a Sample of an Anisotropic Porous Media,” Journal of Geophysical Research, Vol. 67, No. 13, 1962, pp. 5215–5225.
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Go to Journal of Hydraulic Engineering
Journal of Hydraulic Engineering
Volume 109Issue 6June 1983
Pages: 897 - 904

History

Published online: Jun 1, 1983
Published in print: Jun 1983

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Authors

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Govinda Chandra Mishra
Reader, School of Hydrology, Univ. of Roorkee, Roorkee, India
A. Siva Reddy, A. M. ASCE
Prof., Dept. of Civ. and Hydr. Engrg., Indian Inst., of Sci., Bangalore, India

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