基于PS-InSAR技术的佛山三龙湾地区地表形变监测与分析

Monitoring and analysis of surface deformation in Sanlongwan area of Foshan based on PS-InSAR technology

以佛山三龙湾高端创新集聚区为研究区,利用PS-InSAR技术,对2021年3月至2022年4月32景Sentinel-1A数据进行时序分析,得到研究区地表沉降信息,以及主要沉降集中区,并分析主要沉降区成因。结果表明,研究区存在7处地面沉降集中区,沉降速率区间为0~15.4 mm/a,部分区域沉降速率达到22.23 mm/a。沉降受自然因素及人为因素控制,佛山三龙湾高端创新集聚区地面沉降属于发生阶段。在未来,沉降范围将会不断扩大,沉降速率不断增加,沉降集中区域不断增多。

Taking the high-end innovation agglomeration area of Sanlong Bay in Foshan as the research area,PS-InSAR technology was used to analyze the time series of 32 scenes of Sentinel-1A data from March 2021 to April 2022,and the surface subsidence information of the research area was obtained.The main subsidence concentration areas were obtained,and the causes of the main subsidence areas were analyzed.The results show that there are 7 land subsidence concentration areas in the study area,the subsidence rate range is 0~15.4 mm/a,and the subsidence rate in some areas reaches 22.23 mm/a.The subsidence is controlled by natural factors and human factors.Land subsidence in the high-end innovation agglomeration area of Foshan Sanlong wan belongs to the occurrence stage.In the future,the settlement range will continue to expand,the settlement rate will continue to increase,and the settlement concentration area will continue to increase.