Analysis of Infiltration into Draining Porous Media

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Abstract
Numerical analysis was applied to the inundation of a draining sand column. A method was proposed whereby hysteresis could be considered. For Botany sand, after periods of short drainage between inundations, infiltration is rapid. For longer periods of drainage the ensuing infiltration is slower, but the water moves through the media with a much steeper front. The effects of hysteresis are dynamic, depending upon the stage of drainage and the relationship used. Using a strictly wetting curve gives a better prediction than a strictly draining curve.

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