水资源与水工程学报2025，Vol.36Issue(6)：60-67,8.DOI:10.11705/j.issn.1672-643X.2025.06.08
基于GRACE数据的丘陵区地下水资源储量估算方法
Estimation method of groundwater storage in hilly areas based on GRACE
摘要
Abstract
To address the limitation that existing GRACE data inversion predominantly focuses on the as-sessment of groundwater variations,this study proposes a method for estimating the absolute storage of groundwater resources in hilly areas based on the integration of GRACE data and river baseflow data.Taking the hilly area of Hunan Province as a case study,we used GRACE data spanning from 2003 to 2022 to invert groundwater variations,and digital filtering method to calculate monthly baseflow at the outlet stations of the"Four Rivers"(referred to locally as"Sishui")during the same period.By estab-lishing a linear relationship between these two variables,the absolute groundwater storage was derived.The results indicate that,based on the measured water levels from 130 monitoring wells during 2018-2022,the correlation coefficient(r)between the inverted results and the measured values reaches 0.86,with a Nash-Sutcliffe efficiency(NSE)coefficientof0.65,andatimelagof1-2 months.Theaverage regional groundwater storage from 2003 to 2022 was 29 billion m3,exhibiting a trend of initial increase followed by subsequent decrease.This method provides a novel approach to the evaluation and manage-ment of groundwater resources in the hilly areas of southern China.关键词
地下水资源储量/估算方法/GRACE数据/基流/丘陵区/湖南省Key words
groundwater storage/estimation method/GRACE data/baseflow/hilly area/Hunan Prov-ince分类
建筑与水利引用本文复制引用
黄草,刘星宇,张鹏,周慧..基于GRACE数据的丘陵区地下水资源储量估算方法[J].水资源与水工程学报,2025,36(6):60-67,8.基金项目
国家自然科学基金面上项目(52179004) （52179004）
湖南省水利科技项目(XSKJ2022068-04) （XSKJ2022068-04）
