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This article in SSSAJ

  1. Vol. 38 No. 3, p. 541-544
    Received: Oct 3, 1973
    Accepted: Jan 30, 1974

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A Similarity During Early Stages of Rain Infiltration1

  1. L. R. Ahuja and
  2. M. J. M. Romkens2



A similarity is shown to exist during early stages of rain infiltration into a relatively dry soil in which the diffusivity varies exponentially with the water content. The similarity leads to simple expressions for describing the wet-front progress and the water-content change at the soil surface. The wet-front equation adequately describes the experimental data for four different soils. The approach can be extended to some cases of rainfall when the intensity is time-dependent, and to infiltration with transient surface sealing.

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