Abstract Based on 24 scenes Sentinel-1A data covering the Hefei area, we use PS-InSAR and SBAS-InSAR time series processing methods to obtain the land deformation distribution information of Hefei city from 2017-11 to 2019-10. We analyze the temporal and spatial evolution law of land subsidence in the main urban area. At the same time, we obtain the spatial distribution of ground deformation along Hefei metro network. The results show that there are different degrees of deformation along the subway line, and the stations with serious deformation are mainly concentrated in the western and southwest regions, where the maximum subsidence rate reaches 35 mm/a. We carry out deformation field analysis of Chihe-Xishanyi fault, and the cross fault leveling data with space-time synchronization are compared and verified. The analysis shows that the vertical deformation monitoring results of the two kinds of data have certain consistency, and the vertical rise and fall of the data may be controlled alternately by fault tension and compression.
YU Shuyuan,YANG Yuanyuan,ZHANG Pengfei et al. Monitoring Land Subsidence and Fault Activity in Hefei City Based on MT-InSAR[J]. jgg, 2021, 41(4): 398-402.
YU Shuyuan,YANG Yuanyuan,ZHANG Pengfei et al. Monitoring Land Subsidence and Fault Activity in Hefei City Based on MT-InSAR[J]. jgg, 2021, 41(4): 398-402.