Use of the Green-Ampt Equation with Variable Conductivity1
- L. R. Ahuja and
- G. Y. Tsuji2
A comparison with Phillp's two-term equation, derived from a series solution involving t1/2, indicates that the hydraulic conductivity in the Green-Ampt equation of vertical infiltration varies with time when the soil water content of the transmission zone is assumed to be constant. Use of the Green-Ampt equation with a continuously variable conductivity or a piecewise application of the equation as an extension of Philip's two-term equation resulted in improved prediction of infiltration in two Hawaii soils. Both these forms of application require three parameters, hydraulic conductivity, sorptivity, and constant A, which have well-established physical meaning.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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