RISK ASSESSMENT OF LUOJIAGOU LANDSLIDE IN XUANEN CITY, HUBEI

the research of large-scale landslide risk assessment is a very difficult issue in landslide research in recent years. Luojiagou landslide was taken as an example in order to investigate individual landslide risk. The landslide stability was simulated in different rainfall return period(10, 20, 50 years) to calculate landslide probability. The vulnerability of elements in risk was determined by qualitative method based on detailed field investigation. The total risk of economic risk and personnel risk were analyzed quantitatively under different rainfall conditions, and the annual economic risk and individual risk was calculated quantitatively by exceeding probability method. Based on RS data of the landslide field, the risk change of buildings and personnel was directly shown in the 3D model in ARCGIS platform. The result showed that the value of landslide risk was similar in the conditions of 10-year and 20-year rainfall conditions, while the failure probability of landslide and the value of landslide risk increased in the condition of 50-year rainfall.