Active Landslide Detection Based on Sentinel-1 Data and InSAR Technology in Zhouqu County, Gansu Province, Northwest China  

作　　者：Cong Dai Weile Li Dong Wang Huiyan Lu Qiang Xu Ji Jian 

机构地区：[1]State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China [2]College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,China [3]China Railway Eryuan Engineering Group Co.Ltd.,Chengdu 610031,China

出　　处：《Journal of Earth Science》2021年第5期1092-1103,共12页地球科学学刊（英文版）

基　　金：The work was financially supported by the National Key Research and Development Program of China(No.2018YFC1505402);the National Natural Science Foundation of China(Nos.41941019,41521002);the Key R&D project of the Science and Technology Department of the Sichuan Province of China(No.2019YFG0460);the Science and Technology Innovation Fund of the Sichuan Earthquake Agency(No.201901)。

摘　　要：Zhouqu County in Gansu Province, Northwest China, is typically highly prone to landslides. On July 12, 2018, a landslide blocked the Bailong River near Zhouqu County, posing a serious threat to the life and property of local residents and the safety of infrastructure. Small baseline subset interferometry synthetic aperture radar technology(SBAS-In SAR) was adopted to identify the potential active landslides in the surrounding area of Zhouqu County, using ascending and descending orbit Sentinel-1 satellite images taken from October 2017 to December 2018. The surface deformation areas detected by SBAS-In SAR were verified by optical remote sensing image interpretation and field investigation, and a total of 23 active landslides were identified finally. The deformation characteristics of four typical landslides are analysed in detail using deformation velocity and rainfall data. It is found that the deformation velocity of landslides in this area is mainly affected by rainfall and there is a lag effect. The results can provide a reference for the prevention and control of landslide risk in Zhouqu County.

关 键 词：Zhouqu County LANDSLIDE DETECTION small baseline subset interferometry 

分 类 号：P237[天文地球—摄影测量与遥感] P642.22[天文地球—测绘科学与技术] TN957.52[电子电信—信号与信息处理]