摘要
本文在分析传统径流预报精度评定方法的基础上,给出了预报难度的概念和定义,并考虑有无降雨、不同预见期及不同预报流量级别等不同预报情景,提出了两种基于预报误差分布的预报难度计算方法,可实现不同预报情景及不同预报水平标准下的预报难度计算。将其与预报员预报水平评估相结合,建立了考虑预报难度的预报人员综合预报水平评定方法。实例研究结果发现,相比于传统方法,所提综合预报水平评定方法能有效考虑不同预报情景的预报难度,能够充分体现出大难度预报情形(例如长预见期预报)在预报精度提升时对于综合预报水平的贡献量,使所得结果更加科学、合理,可有效促进预报人员预报水平的自我提升。
This paper describes a concept of forecast difficulty and its definition based on analysis of traditional evaluation methods of river runoff forecast levels,and develops two methods for its calculation using forecast error distributions and considering various forecast situations such as different rainfalls,forecast lead times and inflows.These methods can achieve effective calculations of forecast difficulty in various forecast situations under different standards of the forecast levels;and by combining them with evaluation of the forecasters’levels of runoff forecasting,we work out a comprehensive method for evaluating the forecasters’levels that takes into account of the forecast difficulty factor.A case study shows that compared with traditional methods,our comprehensive evaluation method is effective in considering various forecast difficulties in different forecast situations.And it can fully reflect the contribution of difficult forecast situations(such as long lead time)to the comprehensive forecast level;and provides more accurate,scientific and reasonable evaluation of runoff forecast levels,thus effectively promoting the forecasters’self-improvement of forecast levels.
作者
蒋志强
陈育赟
徐杨
张海荣
刘懿
冯仲恺
JIANG Zhiqiang;CHEN Yuyun;XU Yang;ZHANG Hairong;LIU Yi;FENG Zhongkai(School of Hydropower&Information Engineering,Huazhong University of Science and Technology,Wuhan 430074;Department of Water Resources Management,China Yangtze Power Company Limited,Yichang,Hubei 443133)
出处
《水力发电学报》
EI
CSCD
北大核心
2020年第2期81-93,共13页
Journal of Hydroelectric Engineering
基金
国家自然科学基金资助项目(51809098,51809097)
国家重点研发计划项目(2017YFC0405900).
关键词
径流预报
误差
预报难度
预报水平
综合评定
Runoff forecasting
error
forecast difficulty
forecast level
comprehensive evaluation
