基于时序InSAR技术的常州市地表形变监测与影响因素分析  

Land subsidence monitoring and influencing factor analysis in Changzhou based on time series interferometry methods

作　　者：夏璐文 徐佳[1] 肖儒雅[1] 潘伯鸣 孙雪梅 XIA Luwen;XU Jia;XIAO Ruya;PAN Boming;SUN Xuemei(School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China;Changzhou Surveying and Mapping Institute,Changzhou 213003,China)

机构地区：[1]河海大学地球科学与工程学院,南京211100 [2]常州市测绘院,江苏常州213003

出　　处：《测绘工程》2025年第1期53-61,共9页Engineering of Surveying and Mapping

基　　金：江苏省自然资源厅科技创新项目经费资助(2022011)。

摘　　要：地面沉降是常州市的主要地质灾害之一,为了准确掌握地面沉降动态,确保区域可持续发展,利用时序InSAR技术监测常州主城区地表形变,并对其影响因素进行分析。文中采用长短基线组合的方式对2016年1月—2022年12月的186景Sentinel-1A SAR影像进行干涉测量处理,从而生成形变时间序列,并通过相位闭合环误差检测筛选高质量干涉对、使用通用型大气改正在线服务(GACOS)进行大气延迟误差改正,获取常州市主城区2016—2022年地面沉降信息,结果与同期水准数据一致,均方根误差为2.5 mm;再结合地质条件和地下水资料对影响地表形变的因素进行分析,结果表明常州市主城区地面沉降形势总体趋于稳定,仅在邹区镇西侧、武进区南部前黄礼嘉一带局部地区存在沉降现象,而中心城区地面形变总体抬升趋势。Land subsidence is one of the main geological disasters in Changzhou City,Jiangsu Province.In order to grasp the dynamics of land subsidence and ensure the sustainable development of this region,we used the Multi-Temporal InSAR technique to monitor the surface deformation in central areas of Changzhou,and analyzed its influencing factors in this study.Firstly,one hundred and eighty-six Sentinel-1A SAR images acquired from January 2016 to December 2022 were used to form interferograms by means of long and short baseline combination in this paper.Secondly,the interferograms were checked based on the loop phase closure and the atmospheric delay was removed from the interferograms by using Generic Atmospheric Correction Online Service(GACOS).After atmospheric delay correction,we derived the time series of land subsidence from the corrected unwrapped phases.The results were consistent with the leveling data acquired in the same period,and root mean square error did not exceed 2.5 mm/a.Then,geological conditions and groundwater leveling data were combined to analyze the influencing factors.The results show that the central areas of Changzhou are relatively stable as a whole,and the problem of land subsidence is only in a particular area in the west of Zouqu Town and the south of Wujin District.Whereas,the ground deformation and land uplift happens in central urban area.

关 键 词：形变监测 时序InSAR 通用型大气改正在线服务 相位闭合环 

分 类 号：P237[天文地球—摄影测量与遥感] P642.26[天文地球—测绘科学与技术]