摘要
利用GRACE卫星数据反演华北平原2003~2015年地下水储量变化,并用监测井数据进行验证。基于EOF方法分解GRACE年际地下水储量变化,结合冬小麦年均WF_(blue)和TRMM降雨数据分析影响华北平原地下水储量年际变化的因素。结果表明,前2个特征向量方差贡献率为93.09%。其中,第1模态方差贡献率为80.04%,与华北平原2003~2009年冬小麦年均WF_(blue)空间变化的相关系数为-0.69,且空间分布一致;第2模态方差贡献率为13.05%,与同时段降水数据的空间分布的相关系数为0.93。说明农业灌溉,尤其是冬小麦的灌溉对华北平原地下水的消耗起着至关重要的作用。
Using GRACE satellite data,we inverse the changes of groundwater storage in North China plain from 2003 to 2015.The effectiveness of this method is verified by the groundwater level data of monitoring wells.The changes of GRACE interannual groundwater storage is decomposed based on EOF method,and we analyze the factors affecting the interannual changes of groundwater storage in North China plain combined with the annual average WF_(blue) of winter wheat and TRMM precipitation data.The results show that the variance contribution of the first two eigenvectors is 93.09%.The contribution rate of the first mode variance is 80.04%,and the correlation coefficient between the first mode variance and the annual average WF_(blue) spatial change of winter wheat in North China plain from 2003 to 2009 is-0.69,with consistent spatial distribution;the contribution rate of the second mode variance is 13.05%,and the correlation coefficient with the spatial distribution of precipitation data in the same period is 0.93.This research shows that the agricultural irrigation,especially for winter wheat,plays a vital role in the depletion of groundwater in the North China plain.
作者
张明刚
魏长寿
ZHANG Minggang;WEI Changshou(College of Geodesy and Geomatics,Shandong University of Science and Technology,579 Qianwangang Road,Qingdao 266590,China;School of Mining and Coal,Inner Mongolia University of Science and Technology,7 Alding Street,Baotou 014010,China)
出处
《大地测量与地球动力学》
CSCD
北大核心
2022年第5期505-509,共5页
Journal of Geodesy and Geodynamics
作者简介
第一作者:张明刚,硕士生,主要从事GRACE卫星重力方面的研究,E-mail:202082020056@sdust.edu.cn;通讯作者:魏长寿,博士,副教授,主要从事GNSS及卫星重力反演、水文遥感方面的研究,E-mail:652153513@qq.com。
