Abstract: The Xiaochatou Landslide, which is the investigation focus of all potential slope instabilities within the reservoir area, was extensively evaluated. The site specific geological conditions, landslide formation mechanism and the deformation characteristics are investigated based on the geological survey, field test boring program as well as geophysical testing. The performance of the potential slide body and the front portion of the sliding portion are analyzed before and after the full pool conditions. The impact of the wave action induced by the slope instability and the temporary dam failure on the cofferdam during the construction are also evaluated.

Key words:  The Xiaochatou Landslide, Basic Characteristics, Stability, Safety Analysis