Urban Water Supply Network Intelligent Optimization Technology Research And Practice

The paper first systematically collected and sorted out the research results on the expansion and optimization of water supply networks from domestic and foreign literature,network materials and other sources.It summarized and sorted out the research results on the expansion of water supply networks in developed countries such as the United States,Japan,and the United Kingdom,and summarized the intelligent technology and material aspects of water supply networks,providing important references and references for the expansion of the water supply network in Jihongtan area.Based on the actual needs of water supply network expansion,this study focuses on the prediction of urban water consumption,which is the basis for optimizing and expanding the water supply network.Firstly,several commonly used methods for predicting water consumption are analyzed and discussed.Then,the per capita comprehensive index method,the unit land use index method,and the population-land use comprehensive index method are used to study,analyze,and compare the water consumption of the project site,and to select an appropriate long-term water demand for planning purposes.According to the actual water resources situation in the Jihongtan area,water source planning for water supply is conducted.Furthermore,the water supply network model was briefly introduced,and an analysis of the current situation of the water supply industry in China was presented.Through an analysis of the current water supply situation in the Jihongtan area,it was found that there are problems such as hydraulic imbalance in the network,incomplete network systems,and unreasonable layout of raw water pipelines.To address the problems faced by the Jihongtan water supply system,a planning network system model for the Jihongtan area was established based on actual engineering,laying a solid foundation for the optimization design of the network system’s expansion and reconstruction.Finally,in order to obtain a reasonable water supply network design,both economic and reliability aspects need to be considered.In terms of economics,the "annualized total cost of the network" is taken as the objective function as needed.In terms of reliability,the "total sum of nodal excess heads" and "variance of nodal excess heads" are used as objective functions.A multi-objective mathematical model is established for the optimal design of the water supply network,and the traditional design method and multi-objective optimization model are respectively calculated using the NSGA-Ⅱ algorithm,and the effects of the two methods are compared.The research data show that the annualized total cost of the network was 35.783 million yuan before optimization,and the total construction cost of the network was 32.286 million yuan after optimization,saving 3.497 million yuan,or 9.7%.The improvement in both the total sum of nodal excess heads and the variance of nodal excess heads before and after optimization indicates that the operation of the network is more stable and reliable.Based on the NSGA-Ⅱ algorithm,the multi-objective optimization method for expansion and reconstruction saves costs significantly compared to the traditional design method,and the selected pipe diameter after optimization is more reasonable.Meanwhile,the multi-objective optimization method for expansion and reconstruction is more scientific,reliable,and economically rational while meeting the water demand of users.