After impounding of Three Gorges Reservoir

many landslides deform in Xiangxi River Valley

such as the Bai Jiabao

Geng Jiaping

Bai Matan landslides

with different deformation characteristics.Analyses of the deformation characteristics and permeability coefficients of these landslides show that the main factor influencing the response time is permeability of landslide materials.Taking the Bai Jiabao landslide as an example

stability compuations utilizing the Morgenstern-Price method show that the safety factor of the landslide mass varies with the water level from 75m to175m with various values of c andφ.The curves of variations of safety factors with the water level have the two typical types

i.e.

down-up and down-flattening

which are closely related to the location of submerged part of landslide.