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Parameter estimation of unsaturated soil hydraulic properties from unsteady drainage experiments in the laboratory


, : Parameter estimation of unsaturated soil hydraulic properties from unsteady drainage experiments in the laboratory. Unsaturated soils Proceedings of the First International Conference on unsaturated soils, UNSAT' 95, Paris, France, 6-8 September 1995: volume 2: 567-572

A new experimental methodology for determining unsaturated soil hydraulic properties is proposed. The soil hydraulic properties were assumed to be represented by the Van Genuchten closed-form expressions. Unknown parameters were identified using two different optimization techniques: (i) a non-linear least-squares algorithm; and (ii) the pattern-matching capability of a neural network.

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