Landslide Damming Threats Along the Jinsha River,China  

作　　者：Shihao Xiao Limin Zhang Te Xiao Ruochen Jiang Dalei Peng Wenjun Lu Xin He 

机构地区：[1]Department of Civil and Environmental Engineering,The Hong Kong University of Science and Technology,Hong Kong 999077,China [2]The Hong Kong University of Science and Technology Shenzhen–Hong Kong Collaborative Innovation Research Institute,Shenzhen 518000,China [3]State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection,Chengdu University of Technology,Chengdu 610000,China

出　　处：《Engineering》2024年第11期326-339,共14页工程（英文）

基　　金：supported by the National Natural Science Foundation of China(41941017,U20A20112, 52025094);the Research Grants Council of the Hong Kong SAR Government(16203720);the NSFC/RGC Joint Research Scheme(N_HKUST620/20 and 42061160480);the Hetao Shenzhen-Hong Kong Science and Technology Innovation Cooperation Zone(HZQB-KCZYB-2020083).

摘　　要：The 2280 km long Jinsha River has been blocked at least four times in the past 30 years.A landslide dam-ming hazard chain can endanger communities and infrastructures hundreds of kilometers downstream from the damming site in alpine gorges.Past damming events have resulted in severe consequences,demanding a thorough assessment of damming threats along the entire Jinsha River.This study digitizes the Jinsha River and visualizes its topographic,tectonic,hydrologic,and climate characteristics in detail.A two-stage full-probability method is proposed for assessing the damming threats along this river,mak-ing it possible to identify potential damming hotspots and high-priority zones for hazard mitigation.It is found that the upper reach of the Jinsha River poses the greatest damming threat,and the threat level gradually decreases downstream.Approximately 33.4%,36.7%,20.5%,and 9.4%of the entire length of the Jinsha River are classified as low,moderate,high,and very high threat levels,respectively.Compared with existing hydropower projects,future projects in the upper reach are more likely to be exposed to landslide damming.We highlight the value of basin-scale spatial threat analysis and envisage that our findings will promote more targeted local-scale risk assessments for potential damming hot-spots.These outcomes provide the basis for managing the risks of river damming and hydropower infras-tructure along the Jinsha River.

关 键 词：Landslide dam LANDSLIDES Jinsha River Risk analysis HYDROPOWER 

分 类 号：P642.22[天文地球—工程地质学]