Influence of permeability on rainfall infiltration based on water gas two phase flow

The permeability function is one of the key properties in unsaturated soil mechanics and variation parameters water characteristic curve can easily affect matric suction as well infiltration. purpose this research to explore significant effect SWCC on rainfall A gas two phase flow analysis method was conducted investigate influence stable infiltration intensity. Result showed that when saturation low, intensity greatly affected by because modified were related pore size distribution such air entry value ρ 0 parameter m. When close 1, almost not suction. minimum mainly determined intrinsic permeability, while curve, coefficient relative coefficient.