小基线集InSAR技术的小浪底大坝形变监测  

Deformation monitoring of Xiaolangdi dam based on SBAS-InSAR technology

作　　者：何子鑫 于海洋[1,2] 谢赛飞 于丽丽 陈良轩 HE Zixin;YU Haiyang;XIE Saifei;YU Lili;CHEN Liangxuan(Key Laboratory of Spatio-temporal Information and Ecological Restoration of Mines,Henan Polytechnic University,Jiaozuo,Henan 454000,China;School of Surveying and Land Information Engineering,Henan Polytechnic University,Jiaozuo,Henan 454000,China)

机构地区：[1]河南理工大学自然资源部矿山时空信息与生态修复实验室,河南焦作454000 [2]河南理工大学测绘与国土信息工程学院,河南焦作454000

出　　处：《测绘科学》2022年第5期66-72,82,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(U1304402)

摘　　要：针对水库坝体形变监测中的安全运行问题,该文以小浪底大坝为研究区,选取小浪底坝区2017年3月31日—2020年10月17日106景Sentinel-1A影像,研究了基于SBAS-InSAR技术的坝体形变获取方法。根据获取的坝体形变信息,分析了大坝不同位置的形变特征及坝体形变与库区水位变化的周期性规律。结果表明:小浪底大坝形变与水库水位变化密切相关,且各个区域形变表现出明显的空间异质性,整体呈现出中间形变较大,两肩形变较小的形变特征,坝中央年平均形变速率在-20~-25 mm/a,最大垂直累积沉降量达108 mm。Aiming at the problem of safe operation in monitoring dam deformation,this paper selected 106 Sentinel-1 A images from March 31,2017 to October 17,2020 from Xiaolangdi dam to study the dam deformation acquisition method based on SBAS-InAR technology.Based on the obtained dam deformation information,the deformation characteristics of dam at different positions and the periodicity of dam deformation and reservoir water level change were analyzed.The results showed that the deformation of Xiaolangdi dam was closely related to the variation of reservoir water level,and the deformation in each region showed obvious spatial heterogeneity.The deformation characteristics of the dam were large in the middle and small in the shoulders.The average annual deformation rate of the dam center was between-20 and-25,and the maximum vertical cumulative settlement was 108 mm.

关 键 词：SBAS-InSAR 形变监测 土石坝 Sentinel-1A 

分 类 号：P237[天文地球—摄影测量与遥感] TV698.11[天文地球—测绘科学与技术]