Anaysis on Genetic Model of Wenjiagou Debris Flows in Wenchuan Earthquake Area, Sichuan Province
详细信息
- 责任者：Liu Chuanzheng (Steering Centre of Geo-Hazard Emergency ; Ministry of Land and Resources ; Beijing 100081 ; China)
- 刊名：Geological Review
- 出版年：2012
- 卷期：58(4)
- 关键词：泥石流 ; debris flows ; 汶川地震2008 ; Wenchuan earthquake 2008 ; 四川 ; Sichuan Province
- 页码：p.709-716
- 图表：4 illus., 2 tables, 8 refs.
- 分类号：1702
- issnNo：ISSN0371-5736
- isbnNo：CN11-1952/P
摘要
The eight events of debris flow happened in Wenjiagou catchment in the Wenchuan earthquake area, Sichuan Prvince, are different from either the general ravine type or the slope slipping type of debris flow, they are resulted from rainfall-induced infiltrating deformation-failure and erosion of the earthquake-landslide mass. The inherent mechanism of the slope failure and induced debris flow is that the capacity of rainfall infiltration is not enough to cause groundwater stagnant and water-level increasing in losing landslide mass. When temporary dam water is increasing up to the horizontal level, the hydrodynamic pressure is up to the maximum value, then the slope stability decreases to the lowest, and finally, the critical condition of failure slide will be appeared in the surface of landslide mass.