ABSTRACT
ABSTRACT: Rainfall and earthquake are two primary triggers for landslides. In earthquake zones, earthquake could cause a lot of loose deposits and unstable slopes, which are prone to generate new landslides under the subsequent rainfall after earthquake. Based on the inventory of major landslides occurred in Sichuan Province since 2000, combined with the critical rainfall and duration data, the rainfall intensity-duration threshold curves of landslides in Sichuan are drawn, and the threshold changes before and after Wenchuan earthquake are analyzed comparatively. Results show that the threshold is lower after earthquake, indicating an unstable state of slopes after strong earthquakes which result in low rainfall condition to initiate landslide.
