• 责任者：Ma Chao (Key Laboratory of Mountain Hazards and Surface Process ; Chinese Academy of Sciences ; Chengdu 610041 ; China) ; Hu Kaiheng
• 刊名：Journal of Earth Sciences and Environment
• 出版年：2013
• 卷期：35(4)
• 页码：p.98-103
• issnNo：ISSN1672-6561
• isbnNo：CN61-1423/P

Basic characteristics and forming processes of Maoqiaozi landslide transformed into slope debris flow and gully debris flow in Beichuan county of Wenchuan Earthquake stricken area were investigated, and the motion features of transformation process were analyzed with energy conservation principle and Takahashi debris flow motion model. The results show that for the landslide induced by strong earthquake, the intensity of interlayer tatter rubble soil body is weak, and fracture in landslide body develops, so that the landslide can be easily transformed into debris flow under the condition of strong rainfall; the process of Maoqiaozi landslide transformed into slope debris flow is sliding-collision-strong fragmentation-fluidization-quick accumulation along the basement surface for rock-soil body; the process of Maoqiaozi landslide transformed into gully debris flow is landslide body collapse-weak fragmentation-water flow mixing-sapping gully-flow accumulation; after landslide transforming into slope debris flow, starting velocity is fast, and there are no hydraulic process and high resistance, so that motion resistance is large and runout distance is much less than that of gully debris flow; the runout distance of gully debris flow calculated by Takahashi debris flow motion model is very close to the field observing value.