Two-dimensional parametric study of rainfall infiltration into slopes.

摘要

Landslides and debris flows have been observed to be initiated from rainfall as the increase in pore water pressure (PWP) reduces the available shear strength within a slope. The parameters which may affect slope stability include storm intensity, antecedent moisture, and geologic formation. This thesis analyzes and compares these parameters in a transient, two-dimensional finite-element seepage simulation to determine which parameters have the most significant affect on PWP development. Numerical issues associated with these highly non-linear analyses were also investigated. The time-step (time discretization) and finite-element mesh size (space discretization) for a pre-existing transient analysis were selected based on the shape of the PWP profile in the soil and computing time. These studies use the SEEP/W finite-element package. (Abstract shortened by UMI.)