利用高分辨率TerraSAR-X数据监测武汉地区2013～2015年地面沉降  

Monitoring Ground Subsidence in Wuhan City with High-Resolution TerraSAR-X Images from 2013 to 2015

作　　者：白林 江利明[1,2] 汪汉胜 BAI Lin;JIANG Liming;WANG Hansheng(State Key Laboratory of Geodesy and Earth’s Dynamics, Institute of Geodesy and Geophysics, CAS,340 Xudong Street, Wuhan 430077, China;University of Chinese Academy of Sciences, A19 Yuquan Road, Beijing 100049, China)

机构地区：[1]中国科学院测量与地球物理研究所大地测量与地球动力学国家重点实验室,武汉430077 [2]中国科学院大学,北京100049

出　　处：《大地测量与地球动力学》2019年第8期832-836,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41621091,41590854,41431070);国家重点研发计划(2018YFC1406102,2017YFA0603103);中国科学院前沿科学重点研究项目(QYZDB-SSW-DQC027,QYZDJ-SSW-DQC042);中国科学院战略性先导科技专项子课题(XDA19070104);大地测量与地球动力学国家重点实验室重点部署项目(Y509162016)~~

摘　　要：利用27景TerraSAR-X数据进行时序InSAR分析,获取武汉城区2013~2015年地面沉降监测结果,并结合地质、水文及实地踏勘资料进行沉降成因分析。结果表明,武汉城区地面沉降主要分布在汉口后湖、青山区工业路及光谷广场附近区域,最大沉降速率达78.1 mm/a;软土地基上大规模的城市建设引起的地下水位下降和荷载增加是造成沉降的主要原因。另外发现,长江沿岸地表形变与长江水位变化密切相关,初步推测与长江水位对两岸承压水的动态影响有关。This paper uses time series InSAR to obtain ground deformation results from 2013 to 2015 in the Wuhan urban area with 27 TerraSAR-X images. The InSAR results show that the ground subsidence mainly lies in Houhu area, Gongye road and Optics Valley square. The maximum subsidence rate is up to 78.1 mm/a. Analysis of geological data and field investigation show that the subsidence is mainly caused by the hydraulic head drop and loading increasing due to large-scale urban construction on the soft soils foundation. Additionally, a strong correlation is highlighted between the deformation in the bank of Yangtze river and the water level records of the Yangtze river, implying that this previously unknown deformation phenomenon is likely related to seasonal influence of water levels in the Yangtze river on the confined groundwater in the bank areas.

关 键 词：地面沉降 时间序列InSAR 武汉城区 城市建设 软土地基 

分 类 号：P225[天文地球—大地测量学与测量工程] P258[天文地球—测绘科学与技术]