The hydrogeology parameters are inversed by nuclear magnetic resonance(NMR)
and then the push force method to evaluate langdslide stability is modified based on unsaturated strength theory. Taking Zhaoshuling landslide in the Three Gorges Reservoir area for example
the stabilities of the slope at different periods when the Three Gorges reservoir water level falls at various speeds are studied systematically. The result shows that the stability coeffecient has a minimum