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Abstract

 

This article in SSSAJ

  1. Vol. 41 No. 3, p. 654-655
     
    Received: July 12, 1976
    Accepted: Dec 14, 1976


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doi:10.2136/sssaj1977.03615995004100030049x

A Note on the Use of Infiltration Equations1

  1. J.-Y. Parlange2

Abstract

Abstract

It is shown, with the help of an exact example, that the cumulative infiltration, i, may be represented as a function of time t by a relation of the form, st1/2 + at, which can be accurate over a finite time interval. Contrary to a recent suggestion, this expression cannot be identified in general with a time expansion of i. In addition the values of s and a depend on the time interval considered and have no a priori relationship to the soil properties. Consequently such an expression has at most some empirical value. A better suggestion is that data from infiltration experiments should be fitted with analytical expressions which approach the proper limits as t → 0 and t → ∞, whenever possible.

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