Image Interpretation and Spatial Analysis of Geohazards Induced by “4·20” Lushan Earthquake in Epicenter Area
详细信息
- 责任者：Chang Ming (State Key Laboratory for Geohazard Prevention and Geoenvironment Protection ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Tang Chuan
- 刊名：Journal of Chengdu University of Technology
- 出版年：2013
- 卷期：40(3)
- 关键词：遥感 ; remote sensing ; 崩塌 ; avalanches ; 滑坡 ; landslides ; 四川 ; Sichuan Province
- 页码：p.275-281
- 图表：illus., 6 tables, 10 refs.
- 分类号：1600
- issnNo：ISSN1671-9727
- isbnNo：CN51-1634/N
摘要
A strong earthquake occurred in Lushan County,Sichuan Province on April 20,2013.It induced a large number of geohazards.These geohazards have had significant impacts on the earthquake region.In order to understand the distribution patterns of the co-seismic landslides,this paper makes an emergency interpretation and analysis of the post-earthquake airphotos of the landslides.The study areas cover Lushan,Taiping,Baosheng,Longmen,Qingren,Shangli and Siyan.The airphoto data were provided by Sichuan Bureau of Survey and Sichuan Institute of Geological Survey.The data indicate that the spatial distribution of the earthquake triggered landslides is dominated by the seismogenic fault in the GIS statistic analysis.The landslides are mainly distributed in the range of 3 km.The slope gradient was one of the main controlling factors of the landslide distribution,for most landslides occur in the range of 40°~50° slope gradient;Most landslides occur in the range of 1.0~1.5 km elevation above sea-level.Within the scope of 400 m from the drainage system,the landslides distribution density is the largest.Many landslides mainly occur in the soft rocks such as mudstone and sandstone,where small landslides likely occur.Most landslides mainly concentrate in Ⅸ intensity area.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |