Groundwater overexploitation is the main cause of city surface deformation.In Siping City,groundwater level had decreased since 1980 due to large-scale exploitation of groundwater.Subsequently,the level began to rise ...Groundwater overexploitation is the main cause of city surface deformation.In Siping City,groundwater level had decreased since 1980 due to large-scale exploitation of groundwater.Subsequently,the level began to rise under governance while shown a declining trend in the whole Siping area.This paper obtained surface deformation of Siping City from 2017 to 2024 using 36 Sentinel-1B satellite images and 88 Sentinel-1A satellite images based on SBAS-InSAR and analysed the effect of groundwater on deformation.The results indicated that uplift occurs in the centre of the urban area with a maximum average velocity of about 5 mm/y and there were two main subsidence zones during these two time periods with average subsidence velocities of about 3 mm/y and 1.7 mm/y.Groundwater levels showed a high correlation with surface deformation,with rising the levels leading to surface uplift and falling the levels leading to surface subsidence..展开更多
文摘Groundwater overexploitation is the main cause of city surface deformation.In Siping City,groundwater level had decreased since 1980 due to large-scale exploitation of groundwater.Subsequently,the level began to rise under governance while shown a declining trend in the whole Siping area.This paper obtained surface deformation of Siping City from 2017 to 2024 using 36 Sentinel-1B satellite images and 88 Sentinel-1A satellite images based on SBAS-InSAR and analysed the effect of groundwater on deformation.The results indicated that uplift occurs in the centre of the urban area with a maximum average velocity of about 5 mm/y and there were two main subsidence zones during these two time periods with average subsidence velocities of about 3 mm/y and 1.7 mm/y.Groundwater levels showed a high correlation with surface deformation,with rising the levels leading to surface uplift and falling the levels leading to surface subsidence..
