Study On Disaster Chain Of Debris Flow Caused By Glacial Lake Outburst In The Himalayas

This paper introduces the concept of the glacial lakes and disaster chain and elaborates on research on the status quo at home and abroad. It mainly studies the deformation infiltration - subsidence glacial lake outburst mechanism. Natural water bodies of similar artificial reservoirs that were formed by ancient glaciers and modern glacier have been described as a glacial lake. Disaster chain is the phenomena that many natural disasters occurring often induced a series of secondary disasters occurring. As glaciers melt strongly and retreat, highland ice moraine lake rapid "expansion", induced glacial lake outburst, resulting in mudslide geological disaster chain, serious threat to the safety of life and property of the people downstream.This paper studies on disaster chain of debris flow caused by glacial lake outburst in the Himalayas. By collecting and analyzing data, investigating on the scene and indoor and outdoor experiment, each link of disaster chain of debris flow caused by glacial lake outburst is carried on a research respectively. First of all, this paper makes use of a geology analysis method to analyze distribution characteristics and the breach mechanism of debris flow caused by glacial lake outburst; It adopts definite quality geological analysis method to discuss the ice lake breach mechanism and advances the deformation infiltration - subsidence glacial lake outburst mechanism. Using GEO-SLOPE seepage flow analysis module SEEP/W and the data that now is owned to establish geological model, it carrys on the seepage flow analysis for Yindapu lake that had burst. The text makes use of critical hydrologic condition of Moraine Lake burst with overflow type to judge Yindapu lake which happened overflow burst or not. And critical hydrologic condition of Moraine Lake burst with overflow type is: the burst is inevitable as H1H0; the burst is non– possible as (H1+H2)