国土资源遥感2018，Vol.30Issue(2)：132-137,6.DOI:10.6046/gtzyyg.2018.02.18
基于GRACE的华北平原地下水储量时空变化分析
Spatiotemporal analysis of GRACE-based groundwater storage variation in North China Plain
摘要
Abstract
GWSA(groundwater storage anomaly) data of North China Plain from 2003 to 2015 were estimated from terrestrial water storage change (TWSC) data retrieved by monthly GRACE (gravity recovery and climate experiment). The EOF (empirical orthogonal function) method was applied to analyzing the GWSA, and it is shown that cumulative contribution rate of the first three EOF modes reached up to 96.35%. The explanation rate of the total variance of first mode reached about 80%. It is shown that GWSA in the North China Plain behaved consistently descending in the whole region with obvious seasonal fluctuations, caused by groundwater exploitation and precipitation. The second and third mode,with an explanation rate of about 12% and 5%,showed that spatial pattern in northeast - southwest direction and that in northwest - southeast direction were obviously opposite. However,no significant temporal diversification was found,presumably mainly controlled by water cycle under the coastal- inland, piedmont - plain and hydrogeological conditions. This study helps to further understand the spatiotemporal characteristics and drive mechanism of groundwater change in North China Plain.关键词
地下水储量变化/华北平原/GRACE/EOFKey words
ground water storage variations/North China Plain/GRACE/EOF分类
水利科学引用本文复制引用
束秋妍,潘云,宫辉力,黄志勇,郑龙群..基于GRACE的华北平原地下水储量时空变化分析[J].国土资源遥感,2018,30(2):132-137,6.基金项目
北京自然科学基金项目"变化环境下北京平原区降水入渗系数取值研究"(编号:8152012)、国家自然科学基金项目"不同植被覆盖条件下产生地下水净补给的年降水量阈值研究"(编号:41101033)和"北京地区地面沉降三维形变及演化机理研究"(编号:41130744)共同资助. （编号:8152012）
