Study on the formation mechanism of post-earthquake debris fl ow in Yinchanggou, Asbestos County after the 9.5 Luding earthquake

Abstract

Mudslide is a kind of sudden geological disaster, and its formation and development are mainly controlled and infl uenced
by geological, geomorphological and climatic factors. Especially, a large amount of loose solid material produced after earthquakes
reserves a large amount of material source for mudfl ow activities. It is very easy to break out the mudslide disaster under the addition of
extreme weather such as strong rainfall, which causes serious losses. In this paper, we study the post-earthquake mudslide that occurred
in Yinchanggou after the 9.5 Luding earthquake as an example, and analyze the watershed characteristics of Yinchanggou, especially the
characteristics of the mudslide disaster under the seismic conditions, the mechanism of disaster, and put forward the countermeasures of
disaster prevention and mitigation on the basis of which, in order to provide references for the later related mudslide disasters.