基于SBAS-InSAR技术的广州市白云区长时序地表形变监测与成因分析  

Long time-series of surface deformation monitoring and cause analysis in Baiyun district,Guangzhou base on SBAS-InSAR technology

作　　者：丁伟[1] 陈展鹏[1] 许兵[2] 冯志雄 DING Wei;CHEN Zhanpeng;XU Bing;FENG Zhixiong(Guangzhu Urban Planning&Design Survey Research Institute,Guangzhou 510000,China;School of Geosciences and Info-physics,Central South University,Changsha 410000,China)

机构地区：[1]广州市城市规划勘测设计研究院,广东广州510000 [2]中南大学地球科学与信息物理学院,湖南长沙410000

出　　处：《测绘通报》2023年第4期167-171,共5页Bulletin of Surveying and Mapping

基　　金：SAR技术在城市建筑监测和地表形变监测中的应用(2020科研(测)01)。

摘　　要：随着我国城市化进程的推进,城市区域人类活动越来越密集,如地下水开采和地下工程等,导致地表发生沉降,影响人们的生活。为了确保城市健康稳定发展,开展城区大范围地面沉降监测具有重要意义。本文利用SBAS-InSAR技术对广州市白云区2016年2月—2022年3月获取的176景Sentinel-1 SAR影像进行处理,得到了该区域的平均形变速率和时序形变。同时,结合历史光学影像和现场调查对研究区域内的形变原因进行了分析。结果表明,形变主要与当地的地质条件、垃圾生化降解和人类活动(如建构筑物施工等)有关,最大形变速率超过40 mm/a,最大累计形变量超过350 mm。本文研究可为城市区域的地面沉降监测和成因分析提供参考。With the advancement urbanization,the human activities,such as ground water extraction and underground project,become increasingly intensive in cities,resulting in surface subsidence,which influences people's life.To ensure the healthy and stable development of the city,it is of great significance to carry out large-scale land subsidence monitoring in urban areas.This paper uses SBAS-InSAR technology to process 176 Sentinel-1 SAR images of Baiyun district,Guangzhou,acquired from February 2016 to March 2022,and obtains the annual average deformation rate and time-series of deformation.We analyzes the causes of deformation in the study area by combining historical optical images and field investigations.The results show that the deformation is mainly related to local geological conditions,biological and chemical degradation of garbage and human activities.The maximum deformation rate exceeds 40 mm/a,and the maximum cumulative deformation exceeds 350 mm.The research provides a reference for land subsidence monitoring and cause analysis in urban areas.

关 键 词：SBAS-InSAR 地表形变 白云区 Sentinel-1 

分 类 号：P258[天文地球—测绘科学与技术]