基于SBAS-InSAR技术的甘肃华亭市地表形变监测与分析

Monitoring and Analysis of Surface Deformation in Huating City,Gansu Province Based on SBAS-InSAR Technology

小基线集SBAS-InSAR技术能够有效识别区域性地表形变,可以长时间序列分析地表形变特征。本研究获取了覆盖甘肃华亭市范围2017年10月—2021年4月Sentinel-1A升降轨雷达数据214期,利用SBAS-InSAR技术进行差分干涉处理,探测区域地表形变,分析形变区变化规律特征。结果表明:华亭市地表形变区主要分布在主城区北部、市域范围东南部,共计8处,以煤矿代表的地面沉降最为明显,沿视线方向最大年沉降平均速率达-404.036 mm/a。研究获取了区域地表形变区分布状况及形变速率,可为华亭市地表形变监测、地质灾害防治、地下水水资源开发利用提供参考依据。

Small baseline set SBAS-InSAR technology can effectively identify regional surface deformation and analyze the characteristics of surface deformation in a long time series.In this study,214 periods of Sentinel-1A lift orbit radar data covering Huating city,Gansu province from October 2017 to April 2021 were obtained.SBAS-InSAR technology was used for differential interference processing to detect regional surface deformation and analyze the variation characteristics of deformation area.The results show that the surface deformation area of Huating city is mainly distributed in the north of the main urban area and the southeast of the city,with a total of 8 places.The land subsidence represented by coal mines is the most obvious,and the maximum annual average subsidence rate along the line of sight is-404.036 mm/a.The distribution and deformation rate of regional surface deformation area were obtained,which can provide a reference for surface deformation monitoring,geological disaster prevention,and groundwater resources development and utilization in Huating city.