摘要
The 1927 Gulang M8.0 earthquake has triggered a huge number of landslides,resulting in massive loss of people’s life and property.However,integrated investigations and results regarding the landslides triggered by this earthquake are rare;such situation hinders the deep understanding of these landslides such as scale,extent,and distribution.With the support of Google Earth software,this study intends to finish the seismic landslides interpretation work in the areas of Gulang earthquake(VIII-XI degree)using the artificial visual interpretation method,and further analyze the spatial distribution and impact factors of these landslides.The results show that the earthquake has triggered at least 936 landslides in the VIII-XI degree zone,with a total landslide area of 58.6 km^2.The dense area of seismic landslides is located in the middle and southern parts of the X intensity circle.Statistical analysis shows that seismic landslides is mainly controlled by factors such as elevation,slope gradient,slope direction,strata,seismic intensity,faults and rivers.The elevation of 2000-2800 m is the high-incidence interval of the landslide.The landslide density is larger with a higher slope gradient.East and west directions are the dominant sliding directions.The areas with Cretaceous and Quaternary strata are the main areas of the Gulang seismic landslides.The X intensity zone triggered the most landslides.In addition,landslides often occur in regions near rivers and faults.This paper provides a scientific reference for exploring the development regularities of landslides triggered by the 1927 Gulang earthquake and effectively mitigating the landslide disasters of the earthquake.
基金
sponsored by the the National key Research and Development Program of China(2018FYC1504703)
Basic Scientific Fund of the Institute of Geology,China Earthquake Administration(IGCEA1604)
the National Natural Science Foundation of China(41661144037)。
作者简介
XU Jixiang,born in 1995,is a master student being trained jointly by Institute of Geology,China Earthquake Administration and China University of Geosciences(Beijing).His specialty is geological engineering.E-mail:819098392@qq.com;Corresponding Author:XU Chong,born in 1982,is a research professor at Institute of Crustal Dynamics,China Earthquake Administration,formerly Institute of Geology,China Earthquake Administration.His major research interests are earthquake-triggered landslides and geological hazards.E-mail:xc11111111@126.com。
