1Van Geneuchten.M.Th.1980. Aclosed-form equation for predicting the hydraulic conductivity of unsaturated soils [J] . Soil Sci.Am, 44,892-898.
2Richards LA, Gardner WR, Ogata G. Physical processes determining water loss from soil [J] . Soil SciSoe Am Pree, 1956, 20:310-314.
3Simunek J, Scnja M, Van Genuehten, M Th . The HYDRUS-2D software package for simulating water flow and solute transport in two-dimensional variably saturated media [J] . Version 1.0 research Report, U.S.Salinity Laboratory, Riverside, CA. 1996.