Abstract：We use the time-varying gravity field model, the GLDAS hydrological model and lake water volume change data to invert the changes in groundwater storage in the Three-River headwater region from 2003 to 2020. We extract the trend and periodic changes of groundwater storage through singular spectrum analysis. The result shows that from 2003 to 2012, the groundwater storage in the Three-River headwater region showed an overall increasing trend, with an annual growth rate of 0.7 cm/a; from 2013 to 2020 the groundwater storage in the Three-River headwater region showed a decreasing trend, with an annual growth rate of -0.3 cm/a. The annual variation of groundwater storage in the Three-River headwater region is mainly affected by rainfall replenishment, which lags behind the recharge of groundwater by rainfall by two months.
ZHANG Haozhe,CHANG Xiaotao,ZHU Guangbin et al. Analysis on the Variation of Groundwater Storage in Three-River Headwater Region from 2003 to 2020[J]. jgg, 2022, 42(3): 312-317.
