Optimal operation of multireservoir flood control systems is a nonlinear and high-dimensional problem. For a parallel multireservoir system, the impact of joint compensation flood control operation for each reservoir on reducing the peak flow downstream should be considered. This study proposed an optimization method called the stagewise compensation method (SWCM) for flood control operation of a parallel multireservoir system based on the concept of three-stage flood control operation and compensation flood control operation. The dynamic programming-progressive optimality algorithm (DP-POA) was also implemented to verify the solutions of SWCM. The Ji’an parallel multireservoir system was selected as a case study. The results show that SWCM can decompose a parallel multireservoir system into a single-reservoir system and consider the impact of the joint compensation operation for each reservoir on reducing peak flow in the downstream area. When applying SWCM, the reduction rate of typical and 10-year, 20-year, 30-year, 50-year and 100-year designed flood peaks at Ji’an hydrological station can reach over 12% on average, which is great progress compared with conventional flood control operation rules and DP-POA.

多水库防洪系统的最优运行是一个非线性的高维问题。对于并联的多水库系统，应考虑联合补偿洪水控制操作对每个水库的影响，以减少下游的峰值流量。本研究基于三级防洪调度和补偿式防洪调度的概念，提出了一种并行多水库系统防洪调度的优化方法，称为阶段性补偿法（SWCM）。还采用了动态规划-渐进最优算法（DP-POA）来验证SWCM的解。以吉安平行多水库系统为例。结果表明，SWCM可以将并行多储层系统分解为单储层系统，并考虑每个储层联合补偿操作对减少下游地区峰值流量的影响。应用SWCM，吉安水文站典型，10年，20年，30年，50年和100年设计洪峰的减少率平均可达到12％以上，这是一个很大的进步与传统的防洪作业规则和DP-POA相比。