![]() ![]() Consequently, the increase in pore water pressure in the subsurface layer is also delayed. ![]() ![]() Results showed that when the surface soil of a slope has a relatively large ESP value, it has a greater capacity for holding rainwater, and therefore delays rainwater infiltration into the subsurface layer. This model is then used to analyze the effects of the soil porosity parameters (i.e., saturated soil water content θ s and effective soil porosity (ESP)) and soil thickness on the occurrence of slope failure. In this study, a numerical model was developed to estimate the extent of rainwater infiltration into an unsaturated slope, the formation of a saturated zone, and the change in slope stability. In contrast, few studies have been published on the effects of water retention characteristics on slope stability. Amongst the soil hydraulic properties, the hydraulic conductivity K has been frequently analyzed for its effects on slope stability. Modeling rainwater infiltration in slopes is vital to the analysis of slope failure induced by heavy rainfall. ![]()
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