A Note on the Use of Infiltration Equations1
- J.-Y. Parlange2
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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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