Monitoring land subsidence of Hebei section of Beijing-Xiong'an intercity railway by time-series InSAR

doi:10.13474/j.cnki.11-2246.2022.0205

Abstract

Abstract: In this paper, the spatial and temporal distribution of land subsidence along the Beijing-Xiong'an intercity railway (Hebei section), from Gu'an station to Xiong'an station, is obtained by using 34 Sentinel-1B images from 2018 to 2020 based on SBAS-InSAR technology. Then, the spatial autocorrelation analysis is used to understand the spatial distribution characteristics of land subsidence in the study area. Finally, the causes of subsidence are analyzed combined with the hydrological data. The results show that, the development of land subsidence along Hebei section of Beijing-Xiong'an intercity railway is different from north to south. The average annual settlement rate in the north is less than 10 mm/a, and the maximum annual settlement rate in the south is -105.6 mm/a, and the average annual settlement rate in the west is higher than that in the east. By analyzing the influencing factors, it can be concluded that there is a correlation between ground subsidence and groundwater depth, and the area with high groundwater depth has a higher ground subsidence. At the same time, combined with the results of land use change in the study area, it is found that the static load caused by urbanization has a certain impact on the land subsidence along the Beijing-Xiong'an intercity railway.

Key words: Beijing-Xiong'an intercity railway, land subsidence, SBAS-InSAR, Moran's index

CLC Number:

P208

GE Pengfei, LIU Hui, CHEN Mi, LI Yu, DING Ruili, LIU Fei. Monitoring land subsidence of Hebei section of Beijing-Xiong'an intercity railway by time-series InSAR[J]. Bulletin of Surveying and Mapping, 2022, 0(7): 64-70.

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