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This article in SSSAJ

  1. Vol. 44 No. 5, p. 889-891
     
    Received: Nov 13, 1979
    Published: Sept, 1980


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doi:10.2136/sssaj1980.03615995004400050001x

Third-order Integral Relation Between Sorptivity and Soil Water Diffusivity Using Brutsaert's Technique1

  1. J.-Y. Parlange,
  2. R. D. Braddock and
  3. I. Lisle2

Abstract

Abstract

Integral relationships between sorptivity and weighted mean diffusivity have been usually justified by numerical tests. Optimization provides a justification on more fundamental ground, when diffusivity increases rapidly with water content. The present paper presents a further improvement on the optimization result and its precision is discussed for two general classes of soil-water diffusivities. The result should be useful to predict soil-water diffusivity from sorptivity measurements, especially when it can be postulated that the diffusivity has a well-defined (e.g., exponential) functional dependence on the water content.

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