Joint Flood Control Operation of Reservoirs in Xiaoshui Basin Based on DP-PS Algorithm

Taking the reservoir group in the Xiaoshui Basin as the research object, this paper builds a model of joint flood control operation of the reservoir group in the Xiaoshui Basin under combined floods from main and tributary rivers of different frequencies. On this basis, the dynamic programming-pattern search algorithm (DP-PS) is introduced to solve the model, and the operation scheme under the most unfavorable flood scenario is obtained. The results show that, under combined floods of various scenarios, the maximum peak clipping rate of Centianhe Reservoir is above 70%, and that of the Shuangpai Reservoir is above 28%. After the optimized operation of the Centianhe Reservoir, the flood control risk rate of Jianghua County is zero (except for flood No. 7), and the flood control risk rate of Dao County is below 18%. After the optimized operation of Shuangpai Reservoir, the risk rate of flood control in Shuangpai County is below 22% (except for flood No. 7), and the risk rate of flood control in Lingling district is below 34%. In conclusion, after the optimized operation of joint flood control of reservoirs in Xiaoshui Basin, remarkable flood control effects can be seen in Jianghua County, Dao County, Shuangpai County, and Lingling District.