基于InSAR技术的福州市南江滨地区闽江堤岸沉降监测与分析  

Monitoring and Analysis of Minjiang Riverbank Settlement in Nanjiangbin Area of Fuzhou City Based on InSAR Technology

作　　者：赖晓铭 LAI Xiaoming(Fujian Provincial Quality Inspection Center for Surveying and Mapping Products,Fuzhou 350001,China)

机构地区：[1]福建省测绘产品质量检测中心,福建福州350001

出　　处：《测绘与空间地理信息》2025年第2期184-187,共4页Geomatics & Spatial Information Technology

摘　　要：采用2017年1月至2018年12月57景升轨Sentinel-1A数据,基于SBAS-InSAR技术获取了福州市南江滨地区闽江两岸河堤沉降信息,结果表明:闽江南岸河堤地表形变明显,最大下沉速率达-91 mm/a,最大抬升速率达18 mm/a;北岸河堤地表较稳定。通过对南江滨南岸纵断面和特征点分析表明:沿岸地表形变空间分布呈“W”形,其中地表累计最大下沉约为-160 mm,最大抬升约为40 mm。南江滨沿岸地表形变随时间近线性变化,未出现差异性变化。南江滨沿岸地表形变空间差异性较大,不均匀形变可能造成堤岸出现裂缝,因此,对南江滨沿岸地表形变需定期监测,防止出现异常变形。Employing 57 scenes ascending Sentinel-1A data from January 2017 to December 2018,the settlement information of the Minjiang riverbank in the Nanjiangbin area of Fuzhou city was obtained based on SBAS-InSAR technology.The results showed that the surface deformation of the Minjiang riverbank on the south bank was significant,with a maximum subsidence rate of-91mm/yr and a maximum uplift rate of 18mm/yr.The surface of the north bank riverbank was relatively stable.Through the analysis of the longitudinal section and characteristic points on the south bank of the Nanjiang River,it is shown that the spatial distribution of surface deformation along the coast is in a“W”shape,with a cumulative maximum surface subsidence of about-160mm and a maximum uplift of about 40mm.The surface deformation along the Nanjiangbin coast varies almost linearly with time,and there is no differential change.The spatial variation of surface deformation along the coast of Nanjiangbin is significant,and uneven deformation may cause cracks in the riverbank.Therefore,regular monitoring of surface deformation along the coast of Nanjiangbin is necessary to prevent abnormal deformation.

关 键 词：河堤 形变监测 INSAR 时空演化规律 水利工程 

分 类 号：P25[天文地球—测绘科学与技术] TB22[天文地球—大地测量学与测量工程]