基于时序InSAR技术的三峡大坝及周边地区形变监测

相对于需要投入大量人力物力且耗时较长的传统测量手段,采用InSAR技术进行大坝变形监测精度和范围都有了很大提升,全天候、全时间段可工作的特性也使观测周期大大缩短。基于PS-InSAR技术,利用2018年1月6日~2020年4月25日期间的66景哨兵1号卫星影像对三峡大坝周边的地表形变进行变形监测,分析并提取三峡大坝及周边地区的形变情况,研究三峡大坝及周边地区近年来形变的时间和空间演变特质,找出重点沉降区域,有助于维护大坝的安全。

Deformation Monitoring of the Three Gorges Dam and Surrounding Areas Based on Time Series InSAR Technology

Compared with traditional measurement methods that require a lot of manpower and material resources and take a long time,the accuracy and scope of dam deformation monitoring using InSAR technology have been greatly improved,and the characteristics of all-weather and full-time workability also make the observation cycle greatly shorten.Based on PS-InSAR technology,66 Sentinel-1 images from January 6,2018 to April 25,2020 are used to monitor the surface deformation around the Three Gorges Dam,and the deformations of the Three Gorges Dam and its surrounding areas are analyzed and extracted.The temporal and spatial evolution characteristics of deformation of the Three Gorges Dam and its surrounding areas in recent years are studied,and the key settlement areas are found out,which will help maintain the safety of the dam.