基于Google Earth的1920年海原8.5级大地震地质灾害研究  

Study on Geological Disasters Caused by Haiyuan M8.5 Earthquake in 1920 Based on Google Earth

作　　者：李为乐[1] 黄润秋[1] 裴向军[1] 张晓超[1] 张远明[2] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059 [2]四川省华地建设工程有限责任公司,四川成都610081

出　　处：《灾害学》2015年第2期26-31,共6页Journal of Catastrophology

基　　金：国家自然科学基金青年基金(41202210);国土资源部公益性行业专项(201211055);中国地质调查局项目(1212011140005)

摘　　要：详细精确的滑坡编目是地震滑坡灾害评价的前提和基础。利用Google Earth提供的多源高精度卫星影像对1920年海原8.5级地震触发的黄土滑坡进行了详细解译,共解译得到1 000处滑坡,并利用多边形圈出了滑源区和堆积区。海原地震滑坡主要集中分布于西吉县西南部和海原县东南部。统计分析表明,地震触发的滑坡灾害主要受高程、坡高、坡度、坡向等地形地貌参数的控制,大量低角度高速远程滑坡主要是由于黄土液化的作用。A detailed and precise landslide inventory is an essential part of seismic landslide hazard assessment.Based on multisource high-precision satellite images provided by Google Earth,landslides in loess triggered by Haiyuan M8.5 earthquake in 1920 are interpreted in detail.A total of 1000 landslides are got from the interpretation,and the slip source zone and accumulation zone are circled by use of multiple deformation.The landslides mainly distributed in the southwest of Xiji County and the southeast of Haiyuan County.The statistical analysis results indicate that earthquake triggered landslide hazard is mainly influenced by elevation,slope height,slope,and landform parameters,and a large number of low angle high-speed distant landslides is mainly due to the effect of loess liquefaction.

关 键 词：海原地震 黄土滑坡 分布规律 Google EARTH 黄土液化 

分 类 号：P315.9[天文地球—地震学] X4[天文地球—固体地球物理学]