基于SBAS-InSAR的大型滑坡变形分区及时序监测研究  

Research on deformation zoning and time-series monitoring of large-scale landslide based on SBAS-InSAR

作　　者：李沙[1] 张立舟[1,2] 周成涛 刘洋[1] 陈锐[3] LI Sha;ZHANG Lizhou;ZHOU Chengtao;LIU Yang;CHEN Rui(Chongqing Survey Institute,Chongqing 401121,China;College of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Municipal Research Institute of Design,Chongqing 400020,China)

机构地区：[1]重庆市勘测院,重庆401121 [2]重庆交通大学河海学院,重庆400074 [3]重庆市市政设计研究院有限公司,重庆400020

出　　处：《人民长江》2023年第6期103-111,共9页Yangtze River

基　　金：国家自然科学基金青年项目(51808083);重庆市自然科学基金项目(cstc2021jcyj-msxm3174)。

摘　　要：为了研究三峡库区大型滑坡的变形分区,基于2021年1~12月共29景Sentinel-1A数据,通过小基线集干涉测量(SBAS-InSAR)技术研究了师专-群沱子滑坡的变形分区和时序监测。解译结果表明:与全球定位系统监测结果对比,师专-群沱子滑坡的SBAS-InSAR解译结果具有一定准确性;滑坡的蠕变过程表现出明显的时空变形差异,变形区主要集中在未布设治理工程区域,且受场地整平工程的影响,滑坡北部边界出现新的变形区域;滑坡不同区域的主控因素存在差异,前缘变形主要受库水位波动影响;滑坡中部受库水位、降雨联合作用;滑坡后缘主要受长历时降雨控制。所得结果证明SBAS-InSAR技术可以对大型滑坡进行时序监测,为防灾减灾提供技术参考。To analyze the deformation zoning of large-scale landslides in the Three Gorges Reservoir area,based on the Sentinel-1A data of 29 scenes from January to December of 2021 and used the Small Baseline Subsets Interferometric Synthetic Aperture Radar(SBAS-InSAR)technology,the deformation zoning and time-series monitoring of the Shizhuan-Quntuozi landslide were studied.The interpretation results revealed that compared with GPS monitoring data,the accuracy of SBAS-InSAR results was verified.The creep behavior showed noticeable temporal-spatial differences:the deformation area was mainly concentrated in the area without treatment engineering,and a new deformation area appeared on the northern boundary of the landslide due to ground levelling.There were differences in the main control factors of landslides in different regions,such as the factors in the front area were the fluctuation of the reservoir water level,and the middle area of the landslide was affected by the reservoir water level and heavy rainfall.The results reveal that the SBAS-InSAR technology can monitor large-scale landslides in time series and provide reference for disaster prevention and reduction.

关 键 词：大型滑坡 形变监测 SBAS-InSAR Sentinel-1 时间序列 三峡库区 

分 类 号：P237[天文地球—摄影测量与遥感] TV221.2[天文地球—测绘科学与技术]