摘要
卫星降水产品作为雨量计布设稀疏区域的重要数据补充,其时空精度对水文模拟、预测至关重要。位于高寒区的雅鲁藏布江流域是典型的缺资料区域,通过定量指标与分类指标结合的方式评估GSMap和GPM-IMERG两种卫星降水产品在这一地区的适用性。结果表明:两种卫星降水产品均能准确探测到降水事件的发生情况,相比于其上一代TRMM卫星降水数据,两种卫星降水数据与实测地面降水数据相比,精确度更高(Bias<0.579)、相关性更显著(CC>0.902)。两种卫星降水数据与地面实测数据相关性的空间分布规律一致,均为在流域中游相关性强,而上游、下游较弱。对于雅鲁藏布江流域,GPM卫星降水产品相比与TRMM卫星降水产品具有较好的适用性,更能满足水资源开发利用对数据的需求,未来可与地面观测数据融合生成更为可靠的降水数据系列。
Satellite precipitation products serve as an important data supplement to ungauged or data-deficient region,whose temporal and spatial accuracy is crucial to hydrological simulation and prediction.The Yarlung Zangbo River Basin is a typical data-deficient region due to the high-cold mountainous location and extremely difficult for local observation.The applicability of the two satellite precipitation products,GSMap and GPM-IMERG,in this area is evaluated through the combination of quantitative indicators and classification indicators.The results show that both satellite precipitation products can accurately detect the occurrence of precipitation events.Compared with their previous generation TRMM satellite precipitation data,the two satellite precipitation data present higher accuracy(Bias<0.579),the correlation is more significant(CC>0.902),in contrast with the measured ground precipitation data.It is consistent for the spatial distribution of the correlation between the two types of satellite precipitation data and the ground-measured data,a strong correlation in the middle reaches of the river,and weak in the upstream and downstream.For the Yarlung Zangbo River Basin,GPM satellite precipitation products undertake better applicability than TRMM precipitation products,and could better meet the precipitation data requirements of water resources development and utilization.In the future,they can be integrated and assimilated with ground-based observation data to generate more reliable precipitation data products.
作者
姜曦
刘艳丽
吴永祥
王高旭
吴巍
金君良
贺瑞敏
刘翠善
JIANG Xi;LIU Yan-li;WU Yong-xiang;WANG Gao-xu;WU Wei;JIN Jun-liang;HE Rui-min;LIU Cui-shan(State Key Laboratory of Hydrology Water Resources and Hydraulic Engineering,Nanjing Institute of Hydraulic Research,Nanjing 210029,China;College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Yangtze Institute for Conservation and Development,Nanjing 210098,China;Research Center for Climate Change,Ministry of Water Resources,Nanjing 210029,China)
出处
《中国农村水利水电》
北大核心
2021年第6期91-97,共7页
China Rural Water and Hydropower
基金
国家自然科学基金项目(91847301,91747103,51679145)
国家重点研发计划(2016YFA0601602)。
