联合GRACE和水文数据探测松花江流域地下水时空变化  

Detect Songhua River Basin Groundwater Spatiotemporal Variation Characteristics by GRACE and Multi-source Hydrological Data

作　　者：许智铭 王正涛[1] XU Zhiming;WANG Zhengtao(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079

出　　处：《武汉大学学报（信息科学版）》2023年第9期1409-1415,共7页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金(41974007,42274003,41774019,41474018)。

摘　　要：松花江流域地处高纬度地区,是中国重要的粮食产地之一,开展该地区地下水变化的探测和分析工作对揭示区域地下水变化特征、保障社会经济可持续发展、保护区域生态环境有重要意义。采用美国德克萨斯大学空间研究中心发布的重力场恢复与气候实验卫星重力数据,联合全球陆地数据同化模型和全球降水测量计划卫星降水数据反演了松花江流域2002—2017年地下水时空变化,引入可持续性指数定量探测了该区域地下水时空可持续性,并与降水、温度数据及实测水井数据进行对比。研究表明:松花江流域在研究时段内地下水以0.34 cm/a的速率持续增加,空间上从南到北地下水恢复速率依次增大;研究时段内流域地下水系统呈现出严重不可持续性;地下水与降水、温度数据存在明显滞后关系,其变化受降水影响显著;卫星手段反演结果与测井数据在重合时段具有相同的地下水恢复趋势,并存在一定的滞后现象。Objectives:Songhua River Basin is located in high latitude area,as one of the most important food-producing areas in China.Exploring and analyzing groundwater storage changes in this region is of great significance to reveal the characteristics of regional groundwater change,to ensure the sustainable development of the social economy and to protect the regional ecological environment.Methods:We use gravity recovery and climate experiment satellite data released by Center for Space Research,combined with global land data assimilation system hydrological model and global precipitation measurement precipitation data to retrieve the groundwater change of Songhua River Basin in the period of 2002—2017.The sustainability index is also introduced to detect the spatial and temporal sustainability of groundwater quantitatively before being compared with precipitation,temperature and measured well data.Results and Conclusions:In the study period,groundwater of Songhua River Basin increases continuously with a rate of 0.34 cm/a,besides the recovery rate of groundwater increases from south to north;groundwater system of Songhua River Basin shows poor sustainability throughout the period;a significant time lag could be found when the groundwater is compared with precipitation and temperature data;satellite inverse result appears to show the same trend with the in-situ well data and appears to have a time lag between them.

关 键 词：重力场恢复与气候实验卫星 松花江流域 地下水储量 时空变化 

分 类 号：P228[天文地球—大地测量学与测量工程]