基于多源SAR影像的江苏北部地面沉降监测分析

Land Subsidence Monitoring and Analysis of the Northern Jiangsu Based on Multi-source SAR Data

针对江苏北部地面沉降问题,基于多主影像相干目标小基线技术利用Radarsat-2和Sentinel-1A影像监测该地区地面沉降状况并交叉验证分析。监测结果表明:研究区存在明显地表沉降,特别是连云港市徐圩港区沉降最为严重,沉降高达252 mm/a;基于两种数据源的监测结果总体差异较小,均方差为6.2 mm/a;但高分辨率的Radarsat-2监测结果的沉降细节信息更加丰富,在完整性和可靠性上表现更好。

Aiming at the land subsidence problem in the northern Jiangsu area,Radarsat-2 and Sentinel-1A images are used to monitor the ground subsidence status and perform cross-validate analysis based on multiple images coherent targets small baselines InSAR technology.The results shows that obvious land subsidence occurred in the study area.The maximum subsidence rate is as high as 252 mm/a,which is located in Xuwei harbor district of Lianyungang city.The overall difference between the two monitoring results is small and the mean square deviation is 6.2 mm/a.The detailed subsidence information of Radarsat-2 data monitoring results is more richer and it performs better in terms of integrity and reliability.