Abstract: The No.1 landslide of Tangjiao Village is a professional inspecting spot for the third early warning project of geological hazards inspecting in the Three Gorges Reservoir area. The inspecting methods include surface displacement monitoring and subsurface displacement monitoring,etc. The landslide had an abvious deformation during drawdown of reservoir stage with a wide range in April,2007. Based on correlation analysis of deformation,reservoir stage and precipitation,this paper generalizes the ...