Statistical Relations between Landslides Induced by Wenchuan Earthquake and Earthquake Parameters, Geological as well as Geomorphological Factors
详细信息
- 责任者：Li Xiuzhen (Key Laboratory of Mountain Hazards and Surface Processes ; Chinese Academy of Sciences ; Chengdu 610041 ; China) ; Kong Jiming
- 刊名：Journal of Engineering Geology
- 出版年：2010
- 卷期：18(1)
- 关键词：滑坡 ; landslides ; 四川 ; Sichuan Province
- 页码：p.8-14
- 图表：illus., 1 table, 11 refs.
- 分类号：1800
- issnNo：ISSN1004-9665
- isbnNo：CN11-3249/P
摘要
This paper is based on investigations of the landslides induced by Wenchuan Earthquake and collection and analysis of the related data. It presents the statistical relations between the earthquake-induced landslides and other factors including earthquake parameters, geological and geomorphological factors. The results show that: 1)the landslides caused by Wenchuan earthquake mainly occurred in the Ⅶ～Ⅺ intensity districts; 2)the earthquake-induced landslides mainly occurred in the area 300 km from the epicenter, and intensively distributed in the area 200 km from the epicenter; 3)the slopes with the dip angle of 30°～50°, especially 30～40°, are very easy to slide during Wenchuan Earthquake; 4)the earthquake-induced landslides mainly distributed in the elevation range of 600～1 500 m, especially 600～1 000 m; and 5)soft rocks are the easiest to slide during Wenchuan Earthquake; the combination of soft and hard rocks is secondary to slide; and hard rocks are not easy to slide; only a few old landslides were reactivated by Wenchuan Earthquake.