Introduction

It is well known that infiltration can destabilize man-made or natural slopes. Rainfall-induced slope failures are reported to occur during, or immediately after, periods of intense, or low intensity but long-duration, rainfall (Tan et al., 1987; Anderson and Zhu, 1996; Rahardjo, 2000; Ng et al., 2001). There are a number of factors that govern stability during rainfall including slope geometry, soil properties, rainfall intensity and duration, antecedent moisture conditions, and the location of the initial water table. The objective of this example is to highlight the relative importance of some of these factors on the stability of predominately unsaturated slopes.