2002—2020年海河流域陆地水储量变化的时空变化特征

Temporal and spatial variation characteristics of terrestrial water storage change in the Haihe River Basin from 2002 to 2020

为了探究海河流域陆地水储量变化的时空变化特征,基于2002—2020年GRACE(gravity recovery and cli-mate experiment)卫星和GRACE-FO卫星数据,计算海河流域陆地水储量变化,并通过地下水储量变化估值与地下水位变化的相关性分析GRACE/GRACE-FO卫星数据的可靠性.结果表明:①地下水储量变化估值和地下水位变化之间的相关性较强,相关系数r=0.78.②海河流域陆地水储量变化大致呈现自南向北递减趋势;陆地水储量变化的变化速度为-9.80 mm/a.

In order to explore the temporal and spatial variation of terrestrial water storage change in the Haihe River Basin,the terrestrial water storage change in the Haihe River Basin was calculated based on GRACE(Gravity Recovery and Climate Experiment)satellite and GRACE-FO satellite data from 2002 to 2020.The reliability of GRACE/GRACE-FO satellite data was explored through the correlation between valuation of changes in groundwater storage and groundwater level variation.The re-sults showed that:①The correlation between the valuation of changes in groundwater storage and groundwater level variation was strong,and the correlation coefficient was 0.78.②The terrestrial water storage change in Haihe River Basin showed a de-creasing trend from south to north;the annual change rate of terrestrial water storage change reserves is-9.80 mm/a.