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This article in SSSAJ

  1. Vol. 49 No. 1, p. 34-38
    Received: Mar 19, 1984
    Accepted: July 23, 1984

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A Generalized Solution to Infiltration1

  1. A. W. Warrick,
  2. D. O. Lomen and
  3. S. R. Yates2



A generalized solution to the moisture flow (Richards') equation is developed for infiltration. The equation is expressed in terms of dimensionless time, depth, and water content. The reduced form applies for the hydraulic functions of van Genuchten or of Brooks and Corey as well as to other scaled forms and the solution utilizes the procedure of Philip. Answers are presented in concise tables which, in principle, allow for finding moisture profiles, wetting front, intake rate and cumulative intake for a variety of soils and for varying initial water contents. For application, specifically measured hydraulic conductivities can be best-fitted to the forms used here or generalized empirical values can be used from the literature. Thus, either specific or generic parameters may be used, depending on availability for a given problem.

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