@article{Zhou2026, 
author = {Zheng Zhou and Jie Meng and Jiyuan Hu and Deng Pan and Menglei Xie and Jiayao Wang and Jiabei Wang and Chenxiang Wang},
title = {Spatiotemporal dynamics of groundwater storage inferred from MT-InSAR and hydraulic head data in Anyang–Puyang Plain},
year = {2026},
journal = {Geodesy and Geodynamics},
volume = {17},
number = {3},
pages = {406-421},
keywords = {MT-InSAR, Groundwater storage, Skeletal storage coefficient, Land subsidence},
url = {https://www.sciopen.com/article/10.1016/j.geog.2025.09.004},
doi = {10.1016/j.geog.2025.09.004},
abstract = {Groundwater overexploitation in northern Henan Province has led to significant land subsidence and aquifer degradation. This methodologically driven study proposes a physically consistent framework that integrates Sentinel-1A-based Multi-Temporal Interferometric Synthetic Aperture Radar (MT-InSAR) data (2017–2022) with long-term groundwater head observations to invert elastic and inelastic skeletal storage coefficients and assess total groundwater storage (TGWS) changes. The framework is applied to the Anyang–Puyang Plain as a representative case study. MT-InSAR deformation time series were combined with Multi-channel Singular Spectrum Analysis (MSSA) decomposition and polynomial fitting to extract seasonal and long-term trends, enabling spatially distributed inversion of aquifer parameters. Results show strong spatial coupling between land subsidence and hydraulic head decline (maximum Pearson r is 0.993), with deformation dominated by inelastic compaction. The elastic storativity ranges from 0.00093 to 0.01596, whereas the inelastic storativity, ranging from 0.0362 to 0.0457 indicates irreversible compaction processes associated with a cumulative groundwater loss of approximately 3.01 × 108 m3. Based on the long-term groundwater level observations collected in this study and the inferred assumption of preconsolidation head, the TGWS loss reached −12.27 × 109 m3, with a mean annual rate of −2.19 × 109 m3/yr and pronounced depletion in northern areas. Standard deviational ellipse (SDE) analysis revealed a north-westward shift of the depletion centre and enhanced spatial clustering. These findings provide critical hydromechanical insights and quantitative constraints for future groundwater regulation and aquifer recovery strategies in overdrawn regions.}
}