地学前缘 ›› 2026, Vol. 33 ›› Issue (1): 470-482.DOI: 10.13745/j.esf.sf.2025.10.37

• 水文地质新技术新方法 • 上一篇    下一篇

基于重力卫星和基流分割方法的青藏高原东部地下水储量变化分析

刘苏仪1,2(), 韩宁3, 黄志勇4,5, 郑龙群6, 张翀1,2, 宫辉力1,2, 潘云1,2,*()   

  1. 1.首都师范大学 资源环境与旅游学院, 北京 100048
    2.首都师范大学 水资源安全北京实验室, 北京 100048
    3.浙江省钱塘江流域中心, 浙江 杭州 310000
    4.长沙理工大学 水利与海洋工程学院, 湖南 长沙 410114
    5.洞庭湖水环境治理与生态修复湖南省重点实验室, 湖南 长沙 410114
    6.湖州学院 电子信息学院, 浙江 湖州 313000
  • 收稿日期:2025-06-30 修回日期:2025-10-05 出版日期:2026-01-25 发布日期:2025-11-10
  • 通信作者: *潘 云(1980—),男,博士,教授,博士生导师,主要从事卫星重力与水文学研究。E-mail: pan@cnu.edu.cn
  • 作者简介:刘苏仪(2001—),女,硕士研究生,地图学与地理信息系统专业,主要从事卫星重力与水文学研究。E-mail: cnu.liusuyi@gmail.com
  • 基金资助:
    第二次青藏高原综合科学考察项目(2019QZKK0207)

Analyses of groundwater storage changes in the Eastern Tibetan Plateau based on gravimetric satellites and baseflow separation

LIU Suyi1,2(), HAN Ning3, HUANG Zhiyong4,5, ZHENG Longqun6, ZHANG Chong1,2, GONG Huili1,2, PAN Yun1,2,*()   

  1. 1. College of Resource Environment and Tourism, Capital Normal University, Beijing 100048, China
    2. Beijing Laboratory of Water Resources Security, Capital Normal University, Beijing 100048, China
    3. Qiantang River Basin Management Center of Zhejiang Province, Hangzhou 310000, China
    4. School of Hydraulic and Ocean Engineering, Changsha University of Science & Technology, Changsha 410114, China
    5. Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China
    6. School of Electronic Information, Huzhou College, Huzhou 313000, China
  • Received:2025-06-30 Revised:2025-10-05 Online:2026-01-25 Published:2025-11-10

摘要:

在全球变暖与人类活动加剧的背景下,定量解析青藏高原地下水储量时空演变是揭示“亚洲水塔”水循环变化机制的关键环节。联合重力卫星GRACE/GRACE-FO、全球陆面过程模型和全球水文模型反演青藏高原东部地下水储量变化,并将反演结果与基流分割所得结果进行对比验证。重力卫星数据反演结果表明,2003—2022年,青藏高原东部的陆地水储量变化以土壤水为主(贡献率为48.45%),其次是地下水(贡献率为32.69%),其中3个子流域(长江上游、雅砻江、大渡河,面积占比为52.7%)的陆地水储量变化以土壤水占主导,其余7个子流域(面积占比为47.3%)的陆地水储量变化以地下水占主导。青藏高原东部的地下水储量变化呈显著增加趋势((2.11±0.57) mm/a),青藏高原东部10个子流域中,7个子流域的基流分割所得地下水储量变化与重力卫星数据反演结果均呈增加趋势(相关系数r=0.78),但基流分割得到的地下水储量变化趋势明显偏小,其可能原因包括:基流退水过程中集水区面积的持续缩减;基于数值模拟的基流分割方法对研究区基流的系统性低估;重力卫星数据处理过程中的误差。多元回归分析结果显示,降水、气温和向下短波辐射共同驱动了研究区地下水储量增加趋势。

关键词: 重力卫星, GRACE/GRACE-FO, 基流分割, 地下水储量变化, 青藏高原, 气候变化

Abstract:

Under the background of global warming and intensifying human activities, quantitatively analyzing the spatiotemporal evolution of groundwater storage on the Tibetan Plateau is crucial for understanding the changing mechanisms of the “Asian Water Tower” water cycle. This study combines data from the Gravity Recovery and Climate Experiment (GRACE) and GRACE-Follow On (GRACE-FO) satellites, global land surface models, and a global hydrology model to estimate groundwater storage changes in the Eastern Tibetan Plateau. The results are compared and validated with those obtained from baseflow separation. For the period 2003-2022, GRACE/GRACE-FO inversion results indicate that terrestrial water storage (TWS) changes were dominated by soil moisture storage (SMS; 48.45%), followed by groundwater storage (GWS; 32.69%). Specifically, SMS was the dominant component of TWS change in three sub-basins (Upper Yangtze, Yalong River, and Dadu River, accounting for 52.7% of the area), whereas GWS was the major contributor in the remaining seven sub-basins (47.3% of the area). Over the eastern Tibetan Plateau, GWS exhibited a significant increasing trend ((2.11±0.57)mm/a). Among the 10 sub-basins, seven exhibited increasing trends in GWS changes derived from both baseflow separation and GRACE inversion, with a correlation coefficient of 0.78 between the two methods. However, the increasing trends derived from baseflow separation are significantly lower, possibly due to: (1) the continuously reducing catchment area during baseflow recession, (2) a systematic underestimation of baseflow by the separation algorithm, and (3) errors inherent in GRACE/GRACE-FO data processing. Multivariate regression analysis reveals that precipitation, air temperature, and downward shortwave radiation jointly drive the increasing trend in groundwater storage across the study area.

Key words: gravimetric satellites, GRACE/GRACE-FO, baseflow separation, groundwater storage anomalies, Tibetan Plateau, climate change

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