淮河上游区域GPM IMERG卫星降水数据应用评价  

Applicability Evaluation of GPM IMERG Satellite Precipitation Products in the Upper Reaches of Huaihe River Basin

作　　者：王文种[1,2] 黄对[1,2] 刘宏伟[1,2] 马涛[1,2] 王欢[1,2] WANG Wen-zhong;HUANG Dui;LIU Hong-wei;MA Tao;WANG Huan(State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China;Hydrology and Water Resources Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京210029 [2]南京水利科学研究院水文水资源研究所,江苏南京210029

出　　处：《水电能源科学》2020年第8期1-4,共4页Water Resources and Power

基　　金：国家重点研发计划(2017YFC0405701)。

摘　　要：为系统评估GPM IMERG V05B卫星降水产品在淮河息县以上流域的应用,以流域内9个地面站实测雨量数据作为参考,应用统计指标、分类指标及极端降水指标,对2015~2017年GPM IMERG产品分别评价分析了日、月、年尺度上统计指标与分类指标,评估了不同雨强、极端降水探测性能。结果表明,GPM IMERG卫星降水产品与地面监测数据在日、月尺度的降水监测值表现出较好的相关性,总体呈高估现象,日尺度探测率高于0.8,但错报率、汉森和凯普斯得分不理想,月尺度上在8、9月份存在低估,年雨量误差10.0%~23.8%;GPM IMERG对小雨综合探测性能强,但错报率较高,对中雨探测精度较高;极端降水事件探测能力表现不稳定。In order to systematically evaluate the accuracy of GPM IMERG V05 Bsatellite precipitation products in the upper reaches of the Huaihe River basin,statistical indexes and classified indexes and extreme precipitation indexes were calculated based on the comparison of the nine gauged daily precipitation data in the basin and the GPM IMERG products from 2015 to 2017.Then the performance GPM IMERG products at three temporal scales(daily,monthly,annually)and the detection capacity of different rainfall intensities and extreme precipitation were assessed.The results show that GPM IMERG products and ground monitoring data has good correlation in the daily and monthly scale,and has an overall overestimation phenomenon.The daily scale PODis higher than 0.8,but the FARand HKSare not ideal.There is an underestimation in August and September at monthly scale,the annual rainfall error was 10%to 23.8%.GPM IMERG has strong comprehensive detection performance on light rain,but the FARis high,and the detection accuracy of moderate rain was high while the detection ability of extreme precipitation events was unstable.

关 键 词：GPM IMERG 卫星降水 统计指标 分类指标 极端降水指标 淮河 

分 类 号：TV125[水利工程—水文学及水资源]