基于GRACE 数据监测黄河流域陆地水储量变化

Exploreand Analysis Variation of the Terrestrial Water Storage in Yellow River Basin Based on GRACE Data

利用2003—2015年的GRACE重力卫星数据,结合降水量与蒸发量数据,研究黄河流域水储量的时空变化情况,分析其变化趋势与影响因素,并将GRACE数据与GLDAS水文模型的反演结果进行比较,验证GRACE反演结果的准确性。结果表明:研究时段内,黄河流域水储量呈下降趋势,水储量呈现季节性变化,夏秋季水储量较丰,春冬季较少,空间上由西向东递减;相比蒸发量,水储量与降水量相关性更好。

The GRACE gravity satellite data from 2003 to 2015,combined with precipitation and evaporation data were used to study the temporal and spatial changes of terrestrial water storage in the Yellow River basin in order to analyze its changing trend and influencing fac tors.The results of GRACE and the GLDAS hydrological model were compared to verify its accuracy.The results show that during the study period,the terrestrial water storage demonstrates a declining trend and decreases from west to east in space;the terrestrial water storage pres ents seasonal changes clearly,abundant in summer and autumn and less in spring and winter.Comparing with evaporation,the correlation of water storage and precipitation is better.