水库群联合优化调度函数的传统求解方法难以表示出水库调度决策变量与影响因子间的非线性关系 ,也不能很好地反映水库之间的相互关系 .用改进 BP网络可弥补这方面的缺陷 .将该方法用于寻求西安市城市水源供水的三个水库的联合优化调度函数 ,结果表明 ,该方法行之有效 ,且应用简便 The traditional solution method for reservoir group combined optimization scheduling function is difficult to show the nonlinear relationship between reservoir scheduling decision variables and impact factors, and can not well reflect the interrelationship between reservoirs.With improved BP network can make up for the shortcomings. The method is applied to the joint optimization of three reservoirs in Xi’an urban water supply. The results show that this method is effective and easy to use