Dynamic Characteristics of the Long Runout Rock-ice Avalanche at High Altitude——A Case from the Zelongnong Basin,Eastern Himalayan Syntaxis,China

作     者：GAO Shaohua YIN Yueping LI Bin GAO Yang ZHANG Nan ZHANG Tiantian GAO Haoyuan LIU Xiaojie GAO Shaohua;YIN Yueping;LI Bin;GAO Yang;ZHANG Nan;ZHANG Tiantian;GAO Haoyuan;LIU Xiaojie

作者机构：Institute of GeomechanicsChinese Academy of Geological SciencesBeijing 100081China China Institute of Geological Environment MonitoringBeijing 100081China Key Laboratory of Active Tectonics and Geological SafetyMinistry of Natural ResourcesBeijing 100081China School of Civil EngineeringLanzhou University of TechnologyLanzhou 730050China 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2024年第98卷第5期

页      面：1376-1393页

核心收录：

学科分类：081803[工学-地质工程] 07[理学] 070601[理学-气象学] 08[工学] 0818[工学-地质资源与地质工程] 0706[理学-大气科学] 

基　　金：granted by the National Natural Science Foundation of China(Grant Nos.U2244227 and U2244226) the National Key R&D Program of China(Grant No.2022YFC3004301) China Geological Survey Project(Grant No.DD20230538) 

主　　题：rock-ice avalanche dynamic characteristics mobility moraine Eastern Himalayan Syntaxis 

摘      要：Rock-ice avalanches have frequently occurred in the Eastern Himalayan Syntaxis region due to climate change and active tectonic *** events commonly trigger catastrophic geohazard chains,including debris flows,river blockages,and *** study focuses on the Zelongnong Basin,analyzing the geomorphic and dynamic characteristics of high-altitude *** basin exhibits typical vertical zonation,with disaster sources initiating at elevations exceeding 4000 m and runout distances reaching up to 10 *** disaster chain movement involves complex dynamic effects,including impact disintegration,soil-rock mixture arching,dynamic erosion,and debris deposition,enhancing understanding of the flow behavior and dynamic characteristics of rock-ice *** presence of ice significantly increases mobility due to lubrication and frictional *** the disaster event of September 10,2020,the maximum flow velocity and thickness reached 40 m/s and 43 m,***,continuous deformation of the Zelongnong glacier moraine was observed,with maximum cumulative deformations of 44.68 m in the distance direction and 25.96 m in the azimuth direction from March 25,2022,to August 25,*** the future,the risk of rock-ice avalanches in the Eastern Himalayan Syntaxis region will remain extremely high,necessitating a focus on early warning and risk mitigation strategies for such basin disasters.