苏州无锡常州城市群地表沉降监测  

Surface subsidence monitoring of Suzhou Wuxi Changzhou urban agglomeration

作　　者：李旋[1] 王玉军[1] 赵立科[1] 马忠卫[1] LI Xuan;WANG Yujun;ZHAO Like;MA Zhongwei(Key Laboratory of Geohazards of Ground Fissure,Geological Survey of Jiangsu Province,Nanjing 210000,China)

机构地区：[1]江苏省地质调查研究院地裂缝地质灾害重点实验室,江苏南京210000

出　　处：《海洋测绘》2021年第6期49-53,共5页Hydrographic Surveying and Charting

基　　金：江苏省自然资源厅科技创新项目(2020032)。

摘　　要：InSAR技术作为一种遥感技术,具有大范围、高精度监测的优点,可以应用于大范围的城市群地表沉降灾害监测。但目前对于苏州无锡常州城市群的监测研究相对较少。以苏州、无锡、常州城市群为例,使用两个轨道共104景哨兵数据,以一种改进的PS-InSAR技术获取了2019年这3个地区的地表沉降结果。结果表明:苏州和常州的沉降面积和量级都较大,最大累积沉降量均超过60 mm,无锡地表沉降相对较小;沉降主要发生在沿湖沿江的农业种植区域,产生的原因可能与农业灌溉有关。最后将获取的时序InSAR结果与该地区的水准数据进行比较分析,两种数据具有良好的一致性,以水准数据为参考,InSAR数据的监测精度达到3.0 mm/年,表明了InSAR形变监测的高精度和可靠性。As a kind of radar remote sensing technology, InSAR technology has the advantages of large-scale and high-precision monitoring, and can be applied to large-scale urban surface monitoring.However, there are relatively few monitoring studies on large-scale urban agglomerations.Taking Suzhou, Wuxi and Changzhou in Jiangsu Province as an example, this paper uses 104 Sentry data from two tracks to obtain the deformation results of these three areas in 2019 with an improved PSI technology.The results show that the deformation area and deformation magnitude of Suzhou and Changzhou are large, the maximum annual average settlement rate is more than 60 mm, and the surface subsidence in Wuxi is relatively small;the main occurrence of subsidence is mainly land subsidence in the agricultural planting area along the lake and river, the reason may be related to agricultural irrigation.Finally, the obtained InSAR results are compared with the leveling data in this area, and the two data have good consistency.Taking the leveling data as reference, the monitoring accuracy of InSAR Data reaches 2.7 mm/year, which indicates that the InSAR deformation monitoring has high accuracy and reliability.

关 键 词：合成孔径雷达干涉测量 地表沉降监测 永久散射体 哨兵1号 苏州无锡常州城市群 

分 类 号：P237[天文地球—摄影测量与遥感]