重庆大学学报：自然科学版2011，Vol.34Issue(10)：86-96,11.
“5.12汶川地震”映秀极震区地震滑坡编目分析
Analyses of earthquake-induced landslide inventory in Yingxiu meizoseismal area of 5.12 Wenchuan earthquake
摘要
Abstract
A number of landslides were triggered by the Wenchuan earthquake on May 12 2008.The damage caused by these landslides was even more than that by earthquake.Systematic landslides inventory,as a basic technique for landslide study,can provide applicable data to quantify the study of landslides.A lot of earthquake-induced landslides were concentrated in Yingxiu meizoseismal area of 5.12 Wenchuan Earthquake.By means of post-earthquake aerial photo and satellite imagery interpretation and field investigation,this paper gets the information including locations,types and morphometry about 1948 earthquake-induced landslides within the Yingxiu Meizoseismal area（about 109.3 ㎞2） and inventoried them with GIS software.Then,overlay analyses are used between these landslides inventory data and environmental factors such as slope aspect,slope angle,distance from ridge,geologic units and lithology,distance from epicentre and seismogenic fault.The results show that： Landslides are triggered by earthquake scatter predominantly in the range of 30°~50°,and the landslide density is positively correlated with slope angle.Areas nearby ridge are of high landslide density indicating that amplification effect of ridge on seismic wave is an important reason of slope failure.Earthquake-induced landslide development level in Pengguan complex is higher than that in sedimentary petrologic province.Landslide density is the single exponential negative correlation with distance from epicentre and seismogenic fault indicating that earthquake-induced landslide development level in hanging wall of seismogenic fault is higher than that in footwall,and the results predicted by regression correlation agree with the existing research findings.关键词
5.12汶川地震/地震滑坡编目/映秀极震区/统计分析Key words
5.12 wenchuan earthquake/earthquake-induced landslide inventory/Yingxiu merzoseismal area/statistical analysis分类
天文与地球科学引用本文复制引用
刘新荣,胡元鑫,葛华,戚大贺..“5.12汶川地震”映秀极震区地震滑坡编目分析[J].重庆大学学报：自然科学版,2011,34(10):86-96,11.基金项目
中国地质调查局资助项目 （）
