Research on the Joint Flood Control Operation Method of Dongting Lake Reservoir Group and Three Gorges Reservoir

To fully tap into the flood control benefits of the Dongting Lake Reservoir Group, the conditions for the joint flood control operation of the Dongting Lake Reservoir Group in conjunction with the Three Gorges Reservoir in the Chenglingji area were analyzed; On this basis, different activation sequences and flood control scheduling methods for reserving flood control compensation storage capacity in reservoir groups are proposed. Research has shown that Dongting Lake Reservoir can prioritize the use of Zhexi and Zaoshi Reservoirs, and cooperate with the Three Gorges Reservoir to carry out flood control operations on Chenglingji; Under typical flood conditions, the scheduling method proposed in this article can reduce the utilization of flood control capacity in the Three Gorges by 505 million m3 to 2.585 billion m3, lower the maximum flood control water level of the Three Gorges by 0.97 m to 3.6 m. While ensuring flood control safety in the Chenglingji area, it can also reduce the consumption of flood control capacity in the Three Gorges Reservoir and enhance the overall flood control capacity of the reservoir group. The research results can provide reference control compensation for joint flood control and scheduling of reservoirs in the Yangtze River Basin.