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- W2078778498 abstract "Inverse problem of determining unsaturated soil hydraulic properties from transient infiltration and internal drainage events are analyzed. Hydraulic properties are assumed to be described by van Genuchten’s relationships. The inverse problem is solved using Levenberg-Marquardt method while the forward problem is solved using a mass conservative finite difference numerical scheme. The bias induced by different objective functions on the parameter estimates with error free and noisy data are analyzed. Field experiments are conducted at two sites to compare the parameter estimates obtained from the infiltration and internal drainage tests. The results indicate that some objective functions induce undue bias in the estimated parameters in the presence of noise in the data and as such selecting a suitable objective function should be given due importance in the parameter estimation. The comparison of the parameter estimates from infiltration and internal drainage experiments at two sites indicates that the parameter estimates are close to each other. It is concluded that infiltration experiment, which is simpler and of short duration can be an alternative to internal drainage experiment for estimating the unsaturated soil parameters." @default.
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- W2078778498 date "2010-11-01" @default.
- W2078778498 modified "2023-09-22" @default.
- W2078778498 title "Estimation of Unsaturated Hydraulic Parameters from Infiltration and Internal Drainage Experiments" @default.
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- W2078778498 doi "https://doi.org/10.1061/(asce)ir.1943-4774.0000234" @default.
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