近日，武汉大学Qusen Chen团队在研究黄淮海盆地陆地蓄水变化引起的垂直变形中取得新进展。这一研究成果于2024年5月25日发表在《大地测量与地球动力学》上。

据悉，陆地蓄水量(TWS)变化与水团运动有关，水团运动可能导致全球导航卫星系统(GNSS)站的变形位移。

本研究聚焦于探讨黄淮海盆地TWS的时空变化规律及其与当地水文特征的关系。结果显示：TWS变化对GNSS站点垂直速度的影响相对较小，陆地储水量变化的影响主要体现在季节特征的变化上；2011-2022年期间，尽管在大部分黄淮海盆地(HHHRB)区域的TWS呈下降趋势，但重力恢复与气候实验(GRACE)和GRACE后续实验(GFO)与GNSS的垂直位移速度，均反映出HHHRB正在经历隆升过程，而GRACE/GFO的推导速度幅度远小于GNSS。

根据GRACE/GFO和GNSS测量预估的常见水文变形显示，TWS导出的位移可以解释54.5%的GNSS季节变化，相对于GNSS常见信号相位，陆地储水相位提前了约一个月。此外，自2008年以来，HHHRB地下水储量的减少一直在加速。在2020年年中左右达到最低水平后，开始快速上升，这可能与南水北调中线工程的实施密切相关。

附：英文原文

Title: Study on the vertical deformations induced by terrestrial water storage changes in Huang-Huai-Hai river basin

Author: Liangsheng Deng, Yugang Xiao, Qusen Chen, Feifei Liao, Zhao Li

Issue&Volume: 2024/05/25

Abstract: Terrestrial water storage (TWS) variations are associated with water mass movements, which may cause the deformation displacements of the Global Navigation Satellite System (GNSS) stations. This study investigates the spatio-temporal TWS variations and addresses the relationship between deformation variations observed in the Huang-Huai-Hai River Basin (HHHRB) and local hydrological features. Results indicate that the vertical velocities at the GNSS stations induced by TWS changes are relatively small, and the impacts of the terrestrial water storage changes are mainly reflected in the changes of seasonal characteristics. Although there is a downward TWS trend from 2011 to 2022 in most HHHRB areas, velocities from the vertical displacements of both Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-On (GFO) and the GNSS reflect that the HHHRB is undergoing an uplift process, while the magnitude of the GRACE/GFO derived velocities is much smaller than that of the GNSS solutions. Common hydrological deformations estimated from GRACE/GFO and GNSS measurements reveal that the TWS-derived displacements can explain 54.5% of the GNSS seasonal variations, with the phases of terrestrial water storage advancing by about one month relative to GNSS common signal phases. Moreover, the decrease of the groundwater storage in the HHHRB has been accelerating since 2008. After reaching its lowest level around mid-2020, it began to rise rapidly, which might be closely related to the implementation of the South-North Water Transfer Central Project.

DOI: 10.1016/j.geog.2024.04.009

Source: https://www.sciencedirect.com/science/article/pii/S1674984724000429