摘要
为研究多源降水数据产品的地区适用性,对比不同产品的水文模拟效果,选取淮河上游紫罗山、中游黄泥庄两个流域,对比分析CHIRPS、CMORPH、ERA5、IMERG 4种产品模拟流域平均降水的误差特征,利用集总式FLEX模型对产品模拟结果进行比较,探讨了产品在淮河流域不同位置对径流模拟效果的影响。结果表明:①两个流域CHIRPS降水误差最大,CMORPH次之,ERA5和IMERG的精度较高,上游紫罗山流域多源数据集整体高估;②不同降水数据产品径流模拟性能不一,模拟效果与产品精度评估结果基本一致,总体ERA5和IMERG模拟径流与实测吻合较好;③总体而言,4种数据集有效反映了流域的空间水文特性,上游紫罗山流域径流模拟效果优于中游黄泥庄流域。
To study the regional applicability and compare the hydrological simulation effects of different multi-source precipitation data products,the error characteristics between 4 typical watershed-average precipitation of CHIRPS,CMORPH,ERA5 and IMERG data were comparatively analyzed in Ziluoshan watershed and Huangnizhuang watershed,correspondly located at the upper and middle reaches of Huaihe River Basin.Furthermore,the modelling results were compared by using the lumped FLEX model,and the influences of using different data on runoff simulations at different location were investigated.The results showed that:①The precipitation data error of CHIRPS in both watersheds was the largest,followed by CMORPH,ERA5 and IMERG have higher accuracy than others.The multi-source data overestimated the actual precipitation in the upstream region in general.②The runoff simulation of different precipitation data performed differently.The simulation performances were basically consistent with the evaluation results of product accuracy.The simulation runoff of ERA5 and IMERG fit the observed stream flow well.③In overall,the four products can reflect spatial hydrological characteristics of the two watersheds effectively.The effect of runoff simulation in the upper reaches of Ziluoshan watershed was better than that in the middle reaches of Huangnizhuang watershed.This research can provide a scientific basis for the optimal selection of precipitation data products in hydrological applications.
作者
渠畅
魏玲娜
董建志
徐士惠
宁玮
QU Chang;WEI Lingna;DONG Jianzhi;XU Shihui;NING Wei(Key Laboratory of Hydrometeorological Disaster Mechanism and Warning of Ministry of Water Resources,Nanjing University of Information Science and Technology,Nanjing 210044,China;School of Hydrology and Water Resources,Nanjing University of Information Science&Technology,Nanjing 210044,China;School of Earth System Science,Tianjin University,Tianjin 300072,China;Institute of Surface-Earth System Science,Tianjin University,Tianjin 300072,China;Chinese Academy of Meteorological Sciences Zhejiang Branch,Hangzhou 310000,China;Fuhe River Hydrology and Water Resources Monitoring Center,Fuzhou 344000,China;Jiangxi Province Key Laboratory of Poyang Lake Hydrology and Ecology Monitoring and Research,Nanchang 330002,China)
出处
《人民长江》
北大核心
2023年第8期109-117,130,共10页
Yangtze River
基金
国家自然科学基金项目(51909121,52179021)。
关键词
径流模拟
FLEX模型
卫星降水产品
淮河流域
runoff simulation
FLEX model
multi-source precipitation data products
Huaihe River basin
