Abstract：To obtain the distribution characteristics of land subsidence in Beijing, we use the small baseline subset (SBAS) InSAR technology to analyze the sentinel-1 data stacks covering the period from June 2017 to June 2020. The results show that there are five subsidence areas in Beijing, and the maximum annual deformation rate is -111.3 mm/a. We compare time series InSAR measurements and GPS measurements. Comparing the annual rates of 2018 and 2019, the paper also determines that the settlement area is decreasing in each settlement range, and the area of slow settlement is much larger than that of accelerated settlement. The investigation of local subsidence indicates that subsidence in one of the five subsidence areas is still accelerating while the speed of subsidence in the other four subsidence areas is decreasing.
ZHANG Shuangcheng,XU Qiang,LUO Yong et al. Temporal and Spatial Variation of Land Subsidence in Beijing from 2017 to 2020 Interpreted by Time Series InSAR[J]. jgg, 2022, 42(1): 48-53.
