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Soil Science Society of America Journal Abstract -

Absorption of Water by Soil: The Constant Flux Boundary Condition1


This article in SSSAJ

  1. Vol. 43 No. 4, p. 659-664
    Received: May 22, 1978
    Accepted: Mar 12, 1979

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  1. I. White,
  2. D. E. Smiles and
  3. K. M. Perroux2



Absorption of water into soil as the result of a constant flux condition at the soil surface is examined.

Experiments for a fine sand show that the surface water content, movement of the wetting front, and the water content profiles may be predicted from the soil water diffusivity function using the notion of the flux-concentration relation of Philip (1973).

Reduced space and time variables X = Vox and T = Vost are introduced. Use of these variables greatly simplifies treatment of the system and reveals that the surface water content and the reduced position of the wetting front are uniquely defined by T while the water content profiles at any value of T are unique in terms of X.

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