ABSTRACT
An accurate prediction of rain-induced landsliding is still difficult to be performed . This is due to the uncertainty in the slope hydrological conditions believed to be the key factor controlling landsliding, as well as the difficulty in observing such conditions. The incorporation of numerical modelling to simulate and predict slope hydrological behaviour in response to rainfall is suggested. The simulation results show that stability of slope with low permeability and shallow groundwater conditions can change within hours in response to rainstorm. How the rain intensity and duration as well as slope hydrological conditions, such as groundwater table, soil permeability and initial slope saturation, control slope stability also can be observed rigorously
