Abstract We constructed models for changes in atmospheric and terrestrial water mass in the Three Gorges region. Then, using GNSS, GRACE-FO, and environmental mass change models, we calculate and analyze the vertical crustal deformation caused by environmental load from 2019 to 2022 in the region. At last, we discuss the differences in calculating environmental load vertical deformation using the spherical harmonic method based on GRACE-FO data and Green’s function method combined with the mass change model. The research reveals the vertical deformation of terrestrial water load of the two methods exhibits a certain consistency in spatiotemporal distribution, but the mass change model shows higher accuracy and spatial resolution. We calculate the environmental total load vertical deformation at CQWZ and HBZG stations, based on the quality change model. The correlation coefficients between deformation and GNSS measured results reached 0.88 and 0.83, respectively. The vertical deformation rates of the crust in the Three Gorges reservoir area and Dongting lake basin from 2019 to 2022 are 0.5 to 0.7 mm/a and 0.6 to 1.5 mm/a, respectively. We attribute this to the decrease in water level in the region in 2022, leading to crustal rebound. The crust near the Three Gorges reservoir exhibits a pattern of rising in summer and sinking in winter, with vertical deformation amplitudes ranging from -5 to 18 mm, primarily driven by reservoir water storage and atmospheric load.
DUAN Hurong,ZHANG Chenghao,LIANG Wenkang et al. Research on Vertical Crustal Deformation Caused by Environmental Load in the Three Gorges Region Based on Multi-Source Data[J]. jgg, 2024, 44(6): 624-629.
DUAN Hurong,ZHANG Chenghao,LIANG Wenkang et al. Research on Vertical Crustal Deformation Caused by Environmental Load in the Three Gorges Region Based on Multi-Source Data[J]. jgg, 2024, 44(6): 624-629.