Abstract
In this article, we attempt to quantify the variability of water pressure head in response to temporally correlated fluctuations in infiltration rate in partially saturated het- erogeneous formations. This study concentrates on the unsaturated case of predominantly vertical movement of moisture. A closed-form solution is developed to analyze the impacts of the temporal correlation scale of infiltration fluctuations and the spatial correlation scale of log-saturated hydraulic conductivity (lnK S) field on the variability in water pressure head. Our result indicates that the temporal correlation scale of infiltration process or the spa- tial correlation scale of lnK S field takes a role in increasing the variability in the pressure head.
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