黄河流域地下水储量时空演变特征及影响因素分析  

Spatio⁃Temporal Characteristics and Influencing Factors Analysis of GroundwaterStorage Variations in the Yellow River Basin

作　　者：刘家宏[1,2] 周美林 邵薇薇 LIU Jiahong;ZHOU Meilin;SHAO Weiwei(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Key Laboratory of River Basin Digital Twinning of Ministry of Water Resources,Beijing 100038,China)

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [2]水利部数字孪生流域重点实验室,北京100038

出　　处：《人民黄河》2024年第9期67-73,共7页Yellow River

基　　金：国家自然科学基金重大项目(52192671);青海省重点研发与转化计划项目(2022-SF-143)。

摘　　要：基于GRACE和GRACE Follow-On卫星及GLADS数据,考虑气候、植被等影响,构建了时间序列分解和随机森林算法耦合模型,揭示了2003—2022年黄河流域地下水储量时空变化特征及主要驱动过程。结果表明:近20 a黄河流域地下水储量显著减小,减小变率为-3.3 mm/a,其中汾河盆地和关中平原地区减小速度最快,变率为-15~-30 mm/a;气候呈暖干化趋势,植被绿度提高,蒸散发量显著增加;地下水储量的减小是植被覆盖增加、气温升高和蒸散发量增加共同作用导致地下水消耗量增加的结果;地下水储量空间变化主导因素差异显著,不同区域主导过程均由植被状况和气温的相互作用驱动。Based on GRACE and GRACE Follow⁃On satellite,as well as the data of GLDAS,considering the impacts of climate and vegeta⁃tion,a coupled model of time series decomposition and random forest algorithms was built to reveal the spatial⁃temporal variations and driving processes of groundwater storage in the Yellow River Basin from 2003 to 2022.The results indicate that a)over the past 20 years,groundwa⁃ter storage in the basin has significantly decreased,with a rate of-3.3 mm/year,especially in the Fenhe River basin and Guanzhong Plain where the rates are the fastest,ranging from-15 mm/year to-30 mm/year.b)The climate of the basin shows a trend towards warmer and drier,with increased vegetation greenness and evapotranspiration.c)The reduction in groundwater storage is a result of increased groundwa⁃ter consumption caused by a combination of increased vegetation cover,rising temperatures and increased evapotranspiration.d)The domi⁃nant factors for spatial variations in groundwater storage differ significantly,with temperature and vegetation interactions driving the processes in different regions.

关 键 词：GRACE 地下水储量 耦合算法 气候变化 植被 黄河流域 

分 类 号：P641.7[天文地球—地质矿产勘探] TV882.1[天文地球—地质学]