Temporal and spatial distribution of land subsidence by time sequence InSAR
In order to breakthrough the limitation by the incoherence of space and time and the atmo-spheric effect from traditional D-InSAR observation method,this paper analyzes the principles of SBAS-InSAR technology and the feasibility and accuracy of land subsidence observation by taking technical process of Xiuwu County in Jiaozuo City as an example.The urban surface deformation images from 2020 to 2022 were extracted,and the data processing process was designed to obtain the temporal and spatial distribution of land subsidence in the study area.The results show that the land subsidence near the mountain and goaf area is more serious,and the average annual subsidence rate is up to 230 mm/a.Under the influence of mining,subsidence funnels appeared in the surrounding areas of the study area,and the maximum accumulated subsidence was 516 mm.Based on the monitoring of urban land sub-sidence,this paper further analyzes the urban type and surrounding geological environment,and discusses the causes of land subsidence.It is proved that this method has the advantages of high field work efficiency and low cost by comparing and analyzing with other commonly used observation methods.
analysis of time sequenceInSAR short baseline setground deformation monitoringmining geological environment
万方数据
维普
