摘要
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 characteristic of terrestrial water storage （TWS） changes is of great importance to assess hydrological cycle. This article presents the spatial-temporal variations of TWS in China mainland based on the gravity recovery and climate experiment （GRACE） satellite data. The total amount variation trend of water resources in six basins is analyzed. And then the trends of GRACE-based TWS changes are further compared with the simulation results obtained by the global land data assimilation system （GLDAS）. The results indicate that there is upward trend of TWS in the Pearl Riv- er, Yangtze River and Huaihe River basin; however, TWS in the Yellow River, Haihe River and Songliaohe basin ap- pears downward trend. So, our study shows that GRACE can monitor the spatial and seasonal characteristics of TWS changes effectively, which can be used to study the impacts of climate change on the regional and global hydrological cycle.
出处
《水电能源科学》
北大核心
2013年第7期20-23,共4页
Water Resources and Power
基金
国家自然科学基金资助项目(40901016
40830639)
水文水资源与水利工程科学国家重点实验室自主探索课题基金资助项目(2009586612
2009585512)
中央高校基本科研业务费基金资助项目(2010B00714)
