Abstract
The shape of the hysteretic steady state soil water profile is examined theoretically. It is shown that the hysteretic steady state profile which results after wetting acquires usually minimum values of the soil water pressure head, of the hydraulic conductivity, and of the water content, values smaller than the asymptotic values approached at large heights. In contrast, the hysteretic steady state profiles which result after drying do not show such minimum values. Experimental hysteretic steady state profiles established in a vertical sand column confirm the theoretical predictions and are in agreement with those calculated numerically from the flow equation. The importance of the hysteresis for soil water retention and movement is discussed.
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