摘要
为探索估算缺资料地区可能最大降水量的新途径,以遂川江夏溪水位站以上流域为研究区域,基于CMORPH、CHIRPS、MSWEP和TRMM 3B42V7四种卫星降水产品和流域雨量站降水资料,对卫星降水数据进行了精度评估。选用精度较好的MSWEP和TRMM 3B42V7数据,采用改进的统计估算法推求流域面平均可能最大1 d降水量,所得结果分别为311.9和321.7 mm。作为参照,同时还依托较丰富的水文气象测站资料,采用水汽效率放大法求得可能最大1 d降水量为338.3 mm。比较两种途径的可能最大1 d降水量估算成果,相对偏差在8%以内,表明在缺资料的情况下,基于卫星降水产品估算可能最大降水量有着良好的应用前景。
To explore the new way to estimate the probable maximum precipitation in ungauged areas,the basin upstream of the Xiaxi Water Level Station in the Suichuan River is selected as the research area.According to satellite precipitation products including CMORPH,CHIRPS,MSWEP and TRMM 3B42V7 and daily precipitation data of rainfall stations in the basin,the accuracy of satellite precipitation data is evaluated.MSWEP and TRMM 3B42V7 data are used with better precision,1 d PMP in the basin is calculated by the improved statistical method.The results are 311.9 and 321.7 mm,respectively.For reference,1d PMP is also estimated through the water vapor efficiency amplification method,based on abundant hydrometeorological data,and the result is 338.3 mm.Comparing 1 d PMP estimation results of two approaches,the relative deviation is within 8%.It indicates that satellite precipitation products have a good application prospect in the PMP estimation when lack of data.
作者
朱丽虹
李国芳
刘守财
ZHU Li-hong;LI Guo-fang;LIU Shou-cai(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;Basin Management Center of Longgang River and Pingshan River in Shenzhen,Shenzhen 510800,Guangdong Province, China)
出处
《中国农村水利水电》
北大核心
2020年第10期60-65,共6页
China Rural Water and Hydropower
基金
国家重点研发计划课题(2018YFC1508001)
中国电力建设股份有限公司重大科技专项(DJ-ZDZX-2016-02-02)。
关键词
卫星降水产品
可能最大降水
缺资料地区
改进的统计估算法
水汽效率放大法
satellite precipitation products
probable maximum precipitation(PMP)
ungauged region
improved statistical estimation method
water vapor efficiency amplification method
