枯水年引汉济渭并联水库多目标调度及决策

Multi-objective operation and decision making of parallel reservoirs for Hanjiang-to-Weihe water diversion project in dry years

为探明枯水年引汉济渭工程调水能力与发电能力,建立了并联水库多目标优化调度模型,采用非支配排序遗传算法(NSGA-Ⅱ)进行求解;构建四维评价指标,采用基于k阶p级有效概念的备选方案逐次淘汰法(SEABODE)对Pareto解集优选最终方案。结果表明:三个枯水典型年中,偏枯水年总调水量13.62亿m3,有3个月调水不足;特枯水年平均调水量10.06亿m3,有8～10个月调水破坏,且缺水深度随来水的减小而加深,最大月缺水量为0.74亿m3。研究成果量化了调水不足损失程度,为指导枯水年引汉济渭工程的水资源高效利用提供了理论依据。

This paper describes a multi-objective optimization model constructed for operation of parallel reservoirs to verify the capability of water diversion and power generation of the Hanjiang-to-Weihe water diversion project in dry years.It is solved with a non-dominated sorting genetic algorithmⅡ(NSGA-Ⅱ),and optimal schemes are obtained using a system of four-dimensional evaluation indexes and an approach of successive elimination of alternative schemes based on the order and degree of efficiency(SEABODE).The results show that during three typical dry years,only 1.36 billion cubic metres of water needs to be transferred in the low water year and water shortage will occur in three months.In an extraordinary dry year,1.01 billion cubic metres of water on average can be transferred,and in this case water shortage will occur in 8-10 months with the maximum one month shortage of 74 million cubic metres.The results are useful for operation and decision making of the water diversion project in dry years.