利用SBAS-InSAR技术监测菏泽市地面沉降

Monitoring of Land Subsidence in Heze City by Using SBAS-InSAR Technology

采用SBAS-InSAR技术对菏泽市65景Sentinel-1A SAR数据进行处理,获取菏泽市2017-05-20~2021-05-23的沉降结果,并结合地下煤矿工作面的开采对各成像时期的地面沉降情况进行精细化分析,最后利用实际水准数据对SBAS-InSAR监测结果进行精度验证。结果表明,研究时段内,菏泽市地面沉降不断加速,郓城地区沉降较为严重,最大年平均沉降速率达-311 mm/a,最大累积沉降量达-1269 mm。SBAS-InSAR监测到的沉降位置和沉降变化趋势与水准测量结果相符,但在沉降严重区域,SBAS-InSAR监测到的沉降量与实际水准测量结果有一定差异。

We use SBAS-InSAR technology to process 65-view Sentinel-1A SAR data of Heze to obtain the subsidence results of the city from 2017-05-20 to 2021-05-23.We finely analyze the ground subsidence of each imaging period in combination with the underground coal mining,and the actual level data are used to SBAS-InSAR monitoring results for accuracy verification.The results show that the ground subsidence in Heze accelerates continuously during studying period,and the subsidence in Yuncheng area is more serious,with the maximum annual average subsidence rate reaching-311 mm/a and the maximum cumulative subsidence amount reaching-1269 mm.The subsidence location and subsidence change trend monitored by SBAS-InSAR are consistent with leveling results,but in the area of severe settlement,the amount of settlement monitored by SBAS-InSAR is somewhat different from leveling data.