In commenting upon the original paper entitled "Probabilistic Analysis of Seppage," it is pointed out that the authors have presented a technique for estimating seepage through nonhomogeneous soil deposits which may also be useful in a rock mass where a jointed medium may for analysis be replaced by an equivalent anisotropic medium. Even when the joints occur in a regular pattern it is probable that the properties which control flow vary along the joint so that the permeability due to jointing will vary from point to point. When flow occurs partly through discontinuities which occur at random the situation is analogous to that described by the authors for soil. The writer has employed Monte Carlo simulation to estimate potentials in a jointed rock medium. A word description of the Monte Carlo method employed by the writer is similar to that given by the authors for their three-dimensional model. It is also pointed out that in the analysis of the Port Allen Lock, the assumption that for each trial all seepage takes place in a width of 100 ft, implies that theta is in fact ignored in the three-dimensional model. Then the essential difference between the authors' two-dimensional and three-dimensional model is the incorporation of a variable width in the three-dimensional model, which raises the question of what is really gained by having a three-dimensional model.

  • Availability:
  • Supplemental Notes:
    • Discussion by William E. Kelly of Proceeding Paper #9687 written by Tien H. Wa, Shyam K. Vyas and Nien-Yin Chang published April 1973.
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  United States  10017-2398
  • Discussers:
    • Kelly, W E
  • Publication Date: 1974-3

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Filing Info

  • Accession Number: 00262269
  • Record Type: Publication
  • Report/Paper Numbers: Proc. Paper 10421
  • Files: TRIS
  • Created Date: Oct 22 1974 12:00AM