Spatio-Temporal Characteristics and Influencing Factors Analysis of Groundwater Storage Variations in the Yellow River Basin
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.
GRACEgroundwater storagecoupling algorithmclimate changevegetationYellow River Basin
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