时序InSAR广佛地区地表形变监测与分析

Time series InSAR monitoring and analysis of surface deformation in Guangzhou-Foshan region

随着经济的快速发展,城市地区的浅层地表运动已成为当前研究热点与重点。本文采用小基线集干涉测量技术对广佛区域从2018年10月—2022年4月的36景哨兵1号数据进行处理,并引入GACOS产品辅助大气校正,获取研究区的时间序列形变。结果表明,研究区内年平均形变速率主要集中在-4.9~5.9 mm/a,沉降呈零星分布,主要位于禅城区的西部、顺德区的北部及研究区内的南沙区;研究区内的地铁沿线沉降主要在佛山2号线、广州2号线、3号线的局部区域。

With the rapid development of economy,shallow surface movement in urban areas has become the focus of current research.In this paper,small baseline subset interferometric synthetic aperture radar was applied to process 36 scene Sentinel-1 data in Guangzhou-Foshan region from October 2018 to April 2022,and GACOS product was introduced to assist atmospheric correction to obtain the time series deformation of the study area.The results showed that the average annual deformation rate was mainly in the range of-4.9~5.9 mm/a,and the subsidence was scattered,mainly in the west of Chancheng district,the north of Shunde district and Nansha district in the study area.The subsidence along the subway line in the study area was mainly in the local area of Foshan Line 2,Guangzhou Line 2 and Line 3.