8Van Genuchten M T. A closed form equation for predicting the hydraulic conductivity of unsaturated soils[J]. Soil Science Society of American Journal, 1980, 44(5): 892-- 898.
9Mualem Y. A new model for predicting the hydraulic conductivity of unsaturated porous media [J]. Water Resources Research, 1976, 12(3): 513--522.
10Simunek J, Van Genuchten M T, Sejna M. The HYDRUS-2D software package for simulating the one-dimensional movement of water, heat, and multiple solutes in variably saturated media[R]. University of California-Riverside Research Reports, 2008.
