Study On The Multi-objective Joint Optimal Water Regulation In The Complex Water Net

The distribution of water resources in China is characterized by more water in the South and less water in the north,Regional water shortage caused by the inhomogeneous distribution of water resources in time and space has become a bottleneck restricting the development of China's economy and society,the implementation of regional water transfer and inter-basin water transfer is an effective measure to alleviate the shortage of regional water resources.In order to effectively utilize the water diversion source,the water regulation should be carried out after water transfer.This paper taks Jiaodong water receiving area of East Route of South to North Water Transfer Project as the subject investigated,the multi objective joint optimal water regulation model of is established and the multi-objective optimal water regulation scheme in the complex water net is formed.The one dimensional hydrodynamic model of Jiaodong water receiving area is eatablished,the water quantity linkage variation of the regulated engineering groups and the interaction in the complex water transfer network system are discussed.(1)The study of the optimal water regulation in the large scale complex water transfer network.Based on the characteristics of the large scale complex water network system,the minimum amount of water and water supply cost of the water supply unit as the goal,a multi objective joint optimal water regulation model in the complex water net in Jiaodong water receiving area is established.The dynamic weight coefficient method and linear programming are used to transform and solve the regulating model,through the evaluation of water regulation results,the optimal weight coefficient of water shortage is 0.7,and the optimal weight coefficient of water supply cost is 0.3.According to the result of water regulation under this weight coefficient,the multi-objective joint optimal water regulation scheme in the complex water network is formed,that is the regulatory scheme for different water sources and the water supply scheme for each water gate of ten days.(2)The study of the water quantity linkage of the regulated engineering groups in the complex water transfer network system.Based on the multi-objective water optimal regulation scheme in the complex water net,taking the water supply scheme of each water gate as boundary condition,one dimensional hydrodynamic model of Jiaodong water receiving area is established,the variation of water quantity and water level in the complex water transfer network system under two kinds of upstream diversion flow is simulated,this paper analyzed the interaction and the water quantity linkage variation of the regulated engineering groups,and clarified the dynamic storage water level and storage capacity of each regulated engineering.The research shows that the water supply scheme for each water gate proposed by this paper which the maximum difference of water level of Jiaodong channel is 0.7 m in the early stage of water supply and 3.34 m in the later stage of water supply can be achieved in the complex water transfer network,and meet the operational limit requirements of each regulated engineering.The multi-objective water optimal regulation in the complex water net which this paper studied is of guiding significance to the operation and management of the Eastern Route of South-to-North Water Diversion Project.