Reservoir-landslide Hazard Assessment Based on GIS: A Case Study in Wanzhou Section of the Three Gorges Reservoir

作     者：WANG Meng QIAO Jian-ping 

作者机构：Key Laboratory of Geo-surface Process and Mountain Hazards Institute of Mountain Hazards and Environment Chinese Academy of Science 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2013年第10卷第6期

页      面：1085-1096页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 081502[工学-水力学及河流动力学] 0815[工学-水利工程] 

基　　金：supported by the International Cooperation Program of the Ministry of Science and Technology of China (Grant No. 2013DFA21720) the National Science & Technology Support Program during the Twelfth Five-Year Plan Period (Grant No. 2011BAK12B01) 

主　　题：Reservoir-landslide Hazards assessment 

摘      要：Reservoir-landslide is mainly caused by changes in hydrodynamic conditions of slope interior at the time of water storage or discharge. The current study mainly focuses on the typical reservoirlandslide, but the sudden occurrence of some unknown landslides brought a lot of difficulties for hazards prevention. Therefore, we proposed a method to evaluate the regional scale reservoir-landslide hazard. We took Wanzhou section of Three Gorges Reservoir(China) as the study area and systemically and synthetically carried out the reservoir-landslide hazard evaluation under the condition of water level regulation. Firstly, we made reservoir-landslide susceptibility assessment by using the methods of spatial analysis and statistics based on geological and geomorphological materials and field survey data, and then, analyzed the regional-scale slope stability based on the infinite slope model used to analyze the bank slope stability change under the condition of water fluctuation, finally, developed a reservoir-landslide hazard evaluation model based on the results of susceptibility and stability. The hazard evaluation model was used to predict and evaluate the hazard change under the role of water level regulation. The results showed that the landslide hazard of the whole region decreased during water storage, landslide hazards increased during water discharge. The faster the regulation speed, the greater the slope hazard. The results can provide the basis for hazard management and regional land-use planning.