Monitoring Surface Subsidence on the West Bank of the Pearl River with Sentinel-1
Geological disasters such as ground subsidence and collapse have occurred frequently on the west coast of the Pearl River in recent years,causing serious impacts on people's life safety and economic development.In order to accurately put the ground subsidence pat-tern in this region,the subsidence monitoring was carried out by Interferometrric Synthetic Aperture Radar(InSAR)technology,and the sur-face deformation information of the west bank of Pearl River from 2015-2022 was obtained by about 220 of Sentinel-1A/B satellite image.The results show that the overall deformation of the west bank of the Pearl River is small,but the local areas such as Jinwan District of Zhuhai City,Jianghai District and Xinhui District of Jiangmen City,and Ma'an Island of Zhongshan City have significant settlement deformation,with the maximum settlement deformation exceeding 350mm.In the paper,high-resolution historical archived optical image during 2012-2022 are used to reveal the land resource use changes in the local area of Hengqin New Area,Zhuhai.Finally,the distribution of soft soil layers and the combined effect of human activities are analyzed as the main causes of surface subsidence on the west bank of the Pearl River.
InSARground subsidencethe west bank of Pearl Rivercause analysis
NETL
NSTL
万方数据
