The Time-Series InSAR Monitoring and Analysis of Land Subsidence in Decheng District,Dezhou City,Shandong Province
We take Decheng District,Dezhou City,Shandong Province as the study area,and use the 33-view Sentinel-1A ascending orbit and 38-view Sentinel-1B descending orbit im-ages acquired from 2019 to 2021 to extract the spatial and tem-poral distribution information of ground subsidence in the study area based on small baseline subsets InSAR (SBAS-In-SAR) technology. The land settlement monitoring results ob-tained from the ascending and descending track SAR data are cross-validated to verify the reliability of the time-series In-SAR monitoring results. The data of groundwater,precipita-tion and DEM were also combined to quantify and analyze the influencing factors of ground subsidence in the Dezhou area us-ing geographic probes. The results of this paper show that,the land subsidence in the Decheng area shows the characteris-tics of uneven distribution,the range of land subsidence has a tendency of slow expanding,and the center of land subsidence shows a trend of moving eastward and southward year by year. The main factor affecting land subsidence in Decheng District is groundwater level change,followed by annual pre-cipitation. Most of the influencing factors are nonlinear en-hancement effects,and few of them are double factor enhance-ment effects.
Dezhou city Decheng districtSBAS-InSARland subsidencegeographic probesDEM
NETL
NSTL
万方数据
