Abstract: Based on an analysis of the Zhaojiaan landslide caused by water level rise in the reservoir at the other side of a loess ridge,this paper presents a method to analyze and control the landslide risk through controlling water levels of the reservoir.A groundwater numerical model is set up to forecast the groundwater flow pattern.The stability and reliability of the landslide are analyzed to determine the probability of landslide failure at different water levels.According to the theory of landslid...