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目前国内针对冰湖溃决泥石流灾害链的研究尚处于起步阶段,分析其形成过程与条件很有必要。根据对冰湖溃决泥石流多发的藏东南地区的实地调查和数据分析,并结合已有研究,总结了典型冰湖溃决泥石流的灾害特征及灾害链的形成过程、形成条件。提出区内灾害链为内外应力耦合作用地质灾害链,形成过程可分为诱发冰湖溃决、转化、铺床堵江、溃坝洪水4个阶段。通过对比分析探讨了灾害链的形成条件,并提出减灾建议。
At present, the research on debris flow chain of ice-lake collapse is still in its infancy, and it is necessary to analyze its forming process and conditions. According to the field survey and data analysis of the southeastern part of Tibet in which the glacial lake rupture is frequent, and combined with the existing research, the disasters characteristics and the forming process and formation conditions of the debris flow of the typical glacial lake collapse are summarized. It is proposed that the disaster chain in the area is the geological disaster chain with the coupling effect of internal and external stress. The forming process can be divided into four stages: evasion of glacier collapse, transformation, bed blocking and dam break. Through the comparative analysis, it explores the formation conditions of disaster chains and puts forward suggestions on disaster reduction.