The influence of the initial water content on the redistribution of soil water after infiltration
POULOVASSILIS, A.
The effect of the initial soil water content prevailing in a porous column before the initiation of an infiltration-redistribution cycle on the redistribution rate is studied both theoretically and experimentally. I point out that the initial water content may vary following either the drying boundary or the wetting boundary curve of the hysteresis loop involved in the infiltration-redistribution process, and I argue on theoretical grounds that the redistribution rate for initial states on the drying curve is greater than that for states on the wetting boundary curve. I also argue that an increase of the initial water content along the drying curve may result in an increase of the redistribution rate, though an increase along the wetting curve may result in a decrease of the redistribution rate. Experimental results presented support the theoretical conclusions.
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