提出了一种描述水资源系统的数学方法 .系统网络图的数值化方法适用于很广泛的情况 ,而且不需修改主程序 ;调度运行规则概括了实际调度中出现的多种情况 ,并用一组参数进行描述 ,只需修改模型的输入数据文件 ,就可以建立不同的调度方案 .实际运用表明 ,本模型具有很强的功能 ,模拟效果良好 A mathematical method to describe water resources system is proposed.The numerical method of system network map is suitable for a very wide range of situations without modifying the main program.The scheduling rules summarize the various situations that occur in the actual scheduling and use a set of Parameters are described, only need to modify the input data file of the model, we can establish different scheduling schemes.The practical application shows that this model has a strong function, the simulation effect is good