Building And Applying Research Of Water Supply Networks Residual Chlorine Decay Modeling Base On Hydraulic Modeling In T City

Dringking water quality is related to people's health.People's requirements of water supply systems has been increased from the water pressure supplied to the water quality.After treatment the water quality meet the national drinking water standards.But due to the large,complex pipe network,water product physical,chemical,microbiological and electrochemical reaction.Water quality decline when it reaches the user.Therefore,for large-scale urban water supply network,monitoring water quality and doing scientific management is very important.The rapid development of computer technology provide provides a convenient conditions to network modeling.Use network model to solve operational problemsand achieve optimal scheduling will be the future direction of development of water supply companies.This paper does research on establishment and verification of hydraulic model,chlorine decay model and the applyment of chlorine decay.Firstly,this paper do research on pipe network modeling basic theory.Including the basic equation and the equation of hydraulic pipe network modeling method for solving,dynamic simulation mechanism and method of water quality changes in water quality modeling and Genetic Algorithms widely used in the verification process.In plenty of research on the basic theory,take T city network for example,describes the data and data processing methods in the modeling process to be collected.For T city features,developed a distribution node traffic toll system based on business methods.By manually checking and automatic check,contrast the detected values and simulated values of pressure and flow monitoring points,all the deviations of pressure points are ?± 3m,96.2%of pressure points'deviation are ?±2m,76.2%of pressure points‘deviation are ?±1m,meet the pressure needs.At the same time,all the flow deviation are within the accuracy range,meeting the flow needs of the hydraulic model of the water supply network,laying the foundation for the subsequent water quality models.Once again,this paper do research for the mechanism of chlorine decay.The key to constructing chlorine decay model is to determine the main wall of water and chlorine attenuation coefficient.Through experiments and engineering experience determine residual chlorine decay coefficient and the wall Chlorine attenuation coefficient.Based on the hydraulic model,build residual chlorine decay modeling.Realization of the Water Quality of 168 hours delay simulation.According to the diameter and the laying of pipe network's network group,use genetic algorithms to find the optimal solution chlorine wall attenuation coefficient of each group.Contrast monitoring and modeled water quality monitoring points,the simulation error of the city all water quality monitoring points were less than 30%,to meet the water quality model accuracy.Finally,using chlorine decay model,do research to network chlorine equivalent attenuation coefficient,evaluate the health status of the pipe section,and then to measure the daily maintenance of the city's water supply network will be discussed.