摘要
基于21景Sentinel-1影像,采用MT-InSAR技术获取宁波地区2016—2018年的地表沉降信息,利用研究区同期水准数据进行精度评定,两者差值均小于3.0 mm/a,RMSE为1.7 mm/a,表明MT-InSAR方法反演结果与水准结果十分吻合。分析了宁波地区沉降时空特征,结果表明研究区沉降中心分布不集中且数量较多,其中最大沉降速率达22.5 mm/a,沉降量达30.3 mm,位于海曙区;主要交通公路、地铁和铁路均有部分落入沉降区内,并以地铁2号线为例,分析了轨道交通沿线地面沉降特征。
MT-InSAR technique based on 21 Sentinel-1 images is used to research ground subsidence in Ningbo during the period of 2016—2018.The In SAR-derived results were validated by leveling surveys.The difference of displacement rates is less than 3.0 mm/a and RMSE is 1.7 mm/a.This shows that the results obtained by MT-InSAR technique agreed well with those measured by leveling.The spatiotemporal characterization of land subsidence in Ningbo is analyzed.The results show that the settlement centers in the study area are not concentrated and have a large number.The value of largest displacement rate is 22.5 mm/a with maximum settlement of 30.3 mm in Haishu.The main traffic roads,subways and railways are partly located in the subsidence area.Taking metro line 2 as an example,the characteristics of ground subsidence in Ningbo are analyzed along the rail transit.
作者
朱邦彦
李建成
储征伟
王晓
孙静雯
姚冯宇
ZHU Bangyan;LI Jiancheng;CHU Zhengwei;WANG Xiao;SUN Jingwen;YAO Fengyu(Nanjing Insititute of Surveying,Mapping and Geotechnical Investigation Co.,Ltd.,Nanjing 210019,China;School of Geomatics and Geodesy,Wuhan University,Wuhan 430079,China;School of Geomatics and Marine Information,Huaihai Institute of Technology,Lianyungang 222000,China)
出处
《测绘通报》
CSCD
北大核心
2018年第10期102-106,共5页
Bulletin of Surveying and Mapping
基金
国家973计划(2013CB733300)
国家自然科学基金(41404028)
淮海工学院青年基金(Z2017013)
南京市测绘勘察研究院股份有限公司科研项目(2018RD01)
