时序InSAR技术对淮扬区域地面沉降监测  

Monitoring of Land Subsidence in Huaiyang Region by InSAR Technology

作　　者：赵志远 葛超英 徐雯佳 ZHAO Zhiyuan;GE Chaoying;XU Wenjia(Hebei Prospecting Institute of Hydrogeological and Engineering Geology,Shijiazhuang 050021)

机构地区：[1]河北省水文工程地质勘查院,石家庄050021

出　　处：《四川地质学报》2025年第1期162-169,共8页Acta Geologica Sichuan

摘　　要：淮扬区域是长江下游地区的重要城市区,随着城市化进程的加快,淮扬区域因地面沉降导致的问题日益增多。该文利用PS-InSAR和SBAS-InSAR技术,基于40景Sentinel-1升轨数据,对2021年1月至2022年10月淮扬区域的地表状况进行了监测。研究表明:两种方法获取的监测结果一致性较高,主要沉降区的位置也较吻合;淮阴区、仪征市等地存在多处沉降漏斗区,最大形变速率超过-55 mm/a。对InSAR结果进行内符合精度验证,两种技术形变速率结果的相关系数为0.88,证明了其结果的一致性。以淮阴区为例对两种技术的监测结果进行对比分析,发现SBAS-InSAR技术更适用于城市地面沉降的监测,并分析了其沉降原因为石盐开采所导致,目前仍然在加速变形,后期需重点关注;对扬州市变形区域通过光学影像分析其变形为城市开挖修建所导致,目前趋于稳定。Huaiyangregion is an important urban area in the lower reaches of Yangtze River.With the acceleration of urbanization,the problems caused by land subsidence in Huaiyangregion are increasing.In this paper,PS-InSAR and SBAS-InSAR technologies were used to monitor the surface conditions of Huaiyang region from January 2021 to October 2022 based on 40 Sentinel-1 ascending orbit data.The study shows that the monitoring results obtained by the two methods are consistent with each other,and the location of the main settlement region is also consistent.There are many subsidence funnel regions in Huaiyin District and Yizheng City,and the maximum deformation rate exceeds-55 mm/a.The internal coincidence accuracy of InSAR results is verified,and the correlation coefficient of the deformation rate results of the two techniques is 0.88,which proves the consistency of the results.Taking Huaiyin District as an example,the monitoring results of the two technologies are compared and analyzed,and it is found that the SBAS-InSAR technology is more suitable for the monitoring of urban land subsidence.The subsidence is caused by the mining of stone and salt,and the deformation is still accelerating at present,which needs to be paid more attention in the later stage.According to the optical image analysis of the deformation region in Yangzhou city,the deformation is caused by urban excavation and construction,and tends to be stable at present.

关 键 词：地面沉降 PS-INSAR SBAS-InSAR 扬州市 形变分析 

分 类 号：P237[天文地球—摄影测量与遥感]