西藏嘉黎断裂带沿线高位链式地质灾害发育特征分析  

Characteristics,types,main causes and development of high-position geohazard chains along the Jiali fault zone,Tibet,China

作　　者：万佳威 褚宏亮[3] 李滨[1] 高杨[1] 贺凯 李壮 李艺豪 WAN Jiawei;CHU Hongliang;LI Bin;GAO Yang;HE Kai;LI Zhuang;LI Yihao(Key Laboratory of Neotectonic Movement and Geohazard,Institute of Geomechanics,CAGS,Beijing 100081,China;China University of Geosciences,Beijing 100083,China;China Institute of Geo-Environment Monitoring(Guide Center of Prevention Technology for Geo-hazards,MNR),Beijing 100081,China;China Geological Survey,Beijing00037,China;School of Geological Engineering and Surveying and Mapping,Chang’an University,Xi’an,Shaanxi 710054,China)

机构地区：[1]中国地质科学院地质力学研究所新构造运动与地质灾害重点实验室,北京100081 [2]中国地质大学(北京),北京100083 [3]中国地质环境监测院(自然资源部地质灾害防治技术指导中心),北京100081 [4]中国地质调查局,北京100037 [5]长安大学地质工程与测绘学院,陕西西安710054

出　　处：《中国地质灾害与防治学报》2021年第3期51-60,共10页The Chinese Journal of Geological Hazard and Control

基　　金：中国地质调查局地质调查项目(DD20211540)。

摘　　要：西藏嘉黎断裂带沿线高位链式地质灾害十分发育,多次在易贡藏布、帕隆藏布及雅鲁藏布江下游造成流域性灾害链破坏,如易贡高位滑坡灾害链、古乡高位泥石流灾害链、尖母普曲高位崩塌灾害链、米堆冰湖溃决灾害链等。本文基于实地调研,并结合前人资料,总结了嘉黎断裂带沿线高位链式地质灾害的成灾模式,认为其可划分为“高位崩滑-碎屑流-堵江-洪水灾害链”、“高位崩滑-堵江-洪水灾害链”、“高位泥石流-堵江-洪水灾害链”、“冰湖溃决灾害链”等4种类型。本文还从地质构造与地震、地貌与水系、冰川、气象等4个方面分析了高位链式地质灾害的孕灾条件,并对其成因及发展趋势进行了探讨,认为在当前条件下,随着全球变暖加剧和人类工程活动增强,嘉黎断裂带沿线高位链式地质灾害的发生将更加频繁。High-position geohazard chains are widely distributed along the Jiali fault zone,Tibet,China.They often induced severe flood disasters in the river basins of the Yigong Zangbu,Palong Zangbu,and the downstream of Yalu Zangbu,such as the famous Yigong,Guxiang,Jianmupuqu,and Midui high-position geohazard chains.Based on the field investigations and previously published data,these high-position geohazard chains are classified into 4 types:1)high-position landslide-debris flow-dammed lake-flood,2)high-position landslide-dammed lake-flood,3)high-position debris flow-dammed lake-flood,4)glacial lake outburst flood.The formation conditions of the high-position geohazard chains are analyzed from 4 aspects,that is 1)geological structures and earthquakes,2)landscape and river system,3)glacier,4)meteorology.In the end,the main causes and development trends of these geohazard chains are discussed.We believe that the high-position geohazard chains would be more frequent along the Jiali fault zone,with the global warming and the enhancement of the human engineering activities.

关 键 词：嘉黎断裂带 高位链式地质灾害 成灾模式 孕灾条件 成因 

分 类 号：P642[天文地球—工程地质学]