洪水预报是汛期水库调度决策的重要支持,其不确定性将直接影响到水库调度运行。传统的模型参数优选方法未考虑不确定性,得到的最优参数在一些场次洪水预报中精度不高,难以满足汛期水库调度要求,需要研究洪水过程预报的不确定性辅助水库调度决策。本文基于常用的水文预报模型和水文不确定性GLUE分析方法,对洪水预报的不确定性进行分析,并将其引入水库调度决策中,建立了应用不确定性分析进行水库调度的决策模型。结果表明,考虑洪水预报不确定性,将能在期望意义上提高洪水预报水平,更好地为水库调度提供决策支持,发挥水库综合效益。
A key technique of reservoir operation during flood periods is the flood forecasting in which the effect of flood uncertainty is considered. The traditional parameter optimization method however ignores such an uncertainty, and thus the accuracy of optimized parameters and the forecast for some floods is not good enough. Based on the uncertainty analysis of flood forecasting in the GLUE framework, this paper proposes a decision-making system for reservoir operation. Results show an improvement on forecast accuracy in terms of the expected values.