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陆地水资源储量变化对研究我国水文循环规律变化具有重要意义。利用重力卫星(GRACE)观测数据研究了我国陆地总水量时空变化特征,分析了六大江河流域水资源总量变化趋势,并与全球陆面数据同化系统(GLDAS)模拟结果进行对比。结果表明,珠江、长江、淮河流域陆地水储量均存在增加趋势,黄河、海河、松辽河流域总水量均呈递减趋势,验证了GRACE可有效监测陆地总水量的季节性及空间变化规律,对研究气候变化条件下区域及全球水文循环规律具有重要价值。
The change of terrestrial water resources reserves is of great significance for studying the changes of the laws of hydrological cycle in our country. The temporal and spatial variations of total land water in China were studied by using GRACE observations. The trend of total water resources in the six major river basins was analyzed and compared with that of global land surface data assimilation system (GLDAS). The results show that there is an increasing trend of land water reserves in the Pearl River, the Yangtze River and the Huaihe River basin. The total water volume in the Yellow River, Haihe River and Songliao River valleys shows a decreasing trend. The seasonal and spatial variation of GRACE can be effectively monitored. Regional and global hydrological cycles under climate change are of great value.