Abstract:Using GPS, we monitor a landslide in Lixian, Sichuan. Over a year’s monitoring indicates that this mountain is indeed sliding slowly, and the major direction of the slippage is pointing to the school next to the mountain. The displacement of the three monitoring points in this major direction are 180 mm, 262 mm and 448 mm. By gathering the rainfall data in the same time, the comparison indicates that rainfall has a direct effect on the landslide and that it is a delayed effect. We perform a numerical simulation of the process of the landslide using ANSYS, and calculate the displacements of the monitor points. The simulation and monitor results are nearly identical. We derive the relationship between rainfall and elasticity modulus, density, cohesion, internal friction angle, which can be used as a method of landslide prediction.