- 责任者：Chen Xiaoli (Key Laboratory of Active Tectonics and Volcano ; Institute of Geology ; CEA ; Beijing 100029 ; China) ; Ran Hongliu
- 刊名：Chinese Journal of Geophysics
- 出版年：2012
- 卷期：55(4)
- 关键词：滑坡 ; landslides ; 地震小区划 ; seismic microzonation ; 四川 ; Sichuan Province
- 页码：p.1269-1277
- 图表：illus., 38 tables, 3 refs.
- 分类号：1702
- issnNo：ISSN0001-5733
- isbnNo：CN11-2074/P
Earthquake-induced landslide is different from landslide triggered by rainstorms. Compared with landslides caused by rain, landslides induced by earthquake have more wide and dense space distribution and bigger scale, and can cause tremendous loss both to properties and lives. Earthquake-induced landslides usually cannot be prevented by current mitigation measures, thus, it becomes more and more important to develop a useful skill of assessing the hazard of landslides triggered by earthquake for land planning. This paper presents a method for zonation of potential earthquake-induced landslide area based on seismic hazard analysis. The approach takes account of uncertainty about earthquake location, intensity and recurrence, as well as space distribution of seismic peak ground acceleration. The study selects the damaged region in 2008.5.12 Wenchuan Earthquake as target area, and divided potential seismic source zone on the studying of geology, tectonics and seismic activity in this region. On the basis of potential seismic source zone division, this paper calculates the seismic peak ground acceleration according to different probability of exceedance of 10%, 5% and 2% in 50a using seismic hazard analysis method proposed by Cornell in 1968, and then assesses earthquake-induced landslide hazard of study region with comprehensive indexes model. In this model, the hazard is classified into 4 grades as high, secondary high, secondary low and low, and five indexes are used including seismic peak ground acceleration, slope angle, rock type, and distance to faults and rivers. The result of hazards zonation for potential earthquake-induced landslide in the study area shows that landslide areas in Wenchuan earthquake such as Wenchuan County, Beichuan County, Maoxian County et al, are located at areas of high or secondary high grades. In Leiguzhen area of Beichuan Ccounty, where high resolution DEM data is available, the zonation result shows good correlation with reality. The assessed result can be used as reference for primary land planning and site choosing for great projects.oft-com:office:office" />