The Optimal Operation of Multi-reservoir Floodwater Resources Control Based on GA-PSO

Abstract:

Floodwater resources control operation has an important role to reduce flood disaster, ease the contradiction between water supply and demand and improve flood resource utilization. Based on the basin safety and floodwater resources utilization with the maximum benefit for floodwater optimal scheduling, the optimal operation of multi-reservoir floodwater resources control model is established. There are two objectives of floodwater resources control operation in multi-reservoir system. The first one is floodwater control safety, the other one is floodwater resource utilization with the maximum benefit. For the floodwater control safety target, the maximal flood peak reduction criterion is selected as the objective function. The maximal flood peak reduction criterion means that choosing reducing most peak flow as the judgment standard of the flood control operations optimal solution. For the floodwater resource utilization, maximum benefit of floodwater utilization refers to make full use of multi-reservoir capacity, accumulate transit flood as much as possible. In the other word, it refers to take releasing water as least as possible as the target in the case of determining the flood process. The model is solved by the coupling optimal method of genetic algorithm and particle swarm optimization (GA-PSO). GA-PSO uses the mutation for reference and takes PSO as a template, introduces the crossover and mutation into the search process of PSO in order to improve the search capabilities of particles. In order to make the particles have the characteristics of the current global best solution, crossover and mutation are used in the updated particles. Taking Shilianghe reservoir and Anfengshan reservoir in Jiangsu Province, China, for an case study, the results show that the optimal operation will reduce the floodwater resources control pressure, as well as keep nearly 81.11 million cubic meters floodwater resources accumulating in Longlianghe river and Anfengshan reservoir. The maximum discharging flow of Xinshuhe will reduce obviously, which will greatly relief the flood pressure of the downstream. The study of will provide effective protection for the safe floodwater utilization of Lianyungang City and provide a few of references for other cities.