TY  - JOUR
AU  - HE, Jingyuan
AU  - XIAO, Manhua
AU  - YOU, Jianfei
AU  - CHEN, Liyue
AU  - ZHU, Jian
AU  - LU, Chengpeng
PY  - 2025
TI  - Spatiotemporal evolution patterns of groundwater storage variations in hilly area of Jiangxi Province based on downscaling analysis of GRACE data
JO  - Journal of Hohai University (Natural Sciences)
SN  - 1000-1980
SP  - 21
EP  - 32
VL  - 53
IS  - 6
AB  - To study the spatiotemporal characteristics of groundwater storage changes in the hilly areas of Jiangxi Province, based on the gravity recovery and climate experiment (GRACE)/GRACE-FO satellite inversion data from 2003 to 2023, a spatiotemporal evolution analysis framework of groundwater integrating downscaling reconstruction and trend identification was constructed, revealing the pattern of changes in groundwater storage anomalies (GWSA). The high-resolution reconstruction of GWSA was carried out through a deep learning model. The long-term trend component was extracted using seasonal-trend decomposition using LOESS (STL). The groundwater change trend and its significance were identified by combining the Mann-Kendall test and the Theil-Sen slope estimation method. The results show that the reconstructed high-resolution GWSA data clearly reveal the spatiotemporal evolution characteristics of groundwater storage in the hilly areas of Jiangxi Province; after STL, the sequence shows a significant long-term trend and stable seasonal fluctuations. From 2003 to 2023, the groundwater level in the entire province has risen slowly, and the overall long-term trend shows an evolution pattern of “recovery in northeastern and central regions but continuous depletion in southern regions”. Notably, Ganzhou City in southern Jiangxi exhibits a significant decline in groundwater storage, making it a representative groundwater-deficit zone. Groundwater variations exhibit compound characteristics, including regional disparities, phased evolution, and intensified high-frequency anomalies, indicating that the system remains unstable and is in a critical state vulnerable to further depletion.
UR  - https://doi.org/10.3876/j.issn.1000-1980.2025.06.003
DO  - 10.3876/j.issn.1000-1980.2025.06.003