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- W2068388934 abstract "A problem of special interest is the variability of infiltration caused by uncertainty in unsaturated zone parameters. The problem is studied here by solving a one-dimensional form of Richards' equation within a Monte Carlo analysis. Based on experimental data, cross-correlation between measurable soil properties — namely, the soil-water characteristic function and the hydraulic conductivity function — is defined. The unsaturated zone parameters can be estimated explicitly from the value of the saturated hydraulic conductivity. Also clarified are the effects of spatially varied parameters on the variability of point infiltration, water content, and time to the onset of ponding. The paper explores how both model sophistication and parameter cross-correlation affect modeling results. Analytical solutions can be used in the stochastic analysis if cross-correlation is considered. The inclusion of cross-correlation decreases the variability of output parameters without much effect on the mean values of these parameters. An effective value is defined for the saturated hydraulic conductivity that may characterize the heterogeneous soil. For a specified rainfall intensity, this value depends on the variability and autocorrelation structure of the saturated hydraulic conductivity. Neglecting variability may lead to unacceptable errors." @default.
- W2068388934 created "2016-06-24" @default.
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- W2068388934 date "1987-03-01" @default.
- W2068388934 modified "2023-09-27" @default.
- W2068388934 title "Variability of infiltration under uncertainty in unsaturated zone parameters" @default.
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- W2068388934 doi "https://doi.org/10.1016/0022-1694(87)90173-9" @default.
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