GRACE/GRACE-FO重力卫星揭示近20年河西走廊陆地水储量时空变化  

Spatio-temporal terrestrial water storage changes in the Hexi Corridor derived by GRACE/GRACE-FO gravity satellites over the past 20 years

作　　者：禤键豪 张兴福[2] 陈秋杰 XUAN JianHao;ZHANG XingFu;CHEN QiuJie(College of Surveying and Geo-informatics,Tongji University,Shanghai 200092,China;School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]同济大学测绘与地理信息学院,上海200092 [2]广东工业大学土木与交通工程学院,广州510006

出　　处：《地球物理学进展》2024年第1期100-110,共11页Progress in Geophysics

基　　金：国家自然科学基金(42074003)资助.

摘　　要：河西走廊由疏勒河流域、黑河流域和石羊河流域组成,水资源保护对河西走廊生态平衡和经济发展有着重要意义.本文利用JPL GRACE/GRACE-FO Mascon模型反演该区域陆地水储量的时空变化,结合GLDAS模型、实测地下水位和冰川水模型等数据对陆地水储量进行水平衡分析及时空特征变化分析,结果表明:(1)2002-04—2020-01间由于降水和冰川融水的补充,疏勒河流域南部和黑河大部分区域陆地水储量空间变化呈上升趋势,而蒸散消耗与农业扩张则导致疏勒河流域北部和石羊河流域陆地水储量下降;(2)通过水平衡研究发现人类耗水是疏勒河流域、黑河流域和石羊河流域陆地水储量变化的重要因素,平均贡献率分别为-24.49%、-47.20%和-43.29%;(3)河西走廊水资源治理政策的实施减少了农业灌溉耗水量、控制了耕地面积的扩张、抑制了地下水储量的消耗.The Hexi Corridor is composed of Shule River Basin,Heihe River Basin and Shiyang River Basin.Water resources protection is of great significance to the ecological balance and economic development of the Hexi Corridor.The JPL GRACE/GRACE-FO Mascon model was used to derive the spatio-temporal terrestrial water storage changes in this region.Analyzing the water balance and spatio-temporal characteristics of terrestrial water storage combined GLDAS model,measured groundwater level and glacier water model.The results show that:(1)Due to the replenishment of precipitation and glacial meltwater,the spatial variations of terrestrial water storage in the southern Shule River Basin and most of the Heihe River Basin shows an upward trend,while the evapotranspiration consumption and agricultural expansion lead to the decline of terrestrial water storage in the northern Shule River Basin and Shiyang River Basin from April 2002 to January 2020.(2)It was found that human water consumption is an important factor in terrestrial water storage changes in Shule River Basin,Heihe River Basin and Shiyang River Basin,with average contribution rates of-24.49%,-47.20%and-43.29%respectively through the study of water balance.(3)The implementation of water resources management policies in the Hexi Corridor has reduced agricultural irrigation water consumption,controlled the expansion of cultivated land area and restrained the consumption of groundwater storage.

关 键 词：河西走廊 GRACE/GRACE-FO 水储量变化 水平衡 

分 类 号：P228[天文地球—大地测量学与测量工程]