1 优化方法动态规划是解决多阶段决策过程的最优化问题的一种数学方法。应用到水库是将径流过程视为确定性的,将水库蓄水量进行离散作为状态变量,把放水量作为决策变量,把发电、防洪和灌溉综合效益作为目标函数。把每一时段的放水量使整个周期内的目标函数值达到最大的决策组成的策略就是最优调度方案。2 数学建模 1 Optimization Method Dynamic programming is a mathematical method to solve the optimization problem of multi-stage decision-making process. Applied to reservoirs, the runoff process is regarded as a certainty. The reservoir water storage capacity is discretized as the state variable, and the discharge capacity is taken as the decision variable. The overall efficiency of power generation, flood control and irrigation is taken as the objective function. The strategy of making the objective function value which maximizes the whole function of the quantity of water discharged during each period is the optimal scheduling solution. 2 Mathematical Modeling