Research on integrated analysis method of hydraulic and water quality impacts of burst pipes in water supply network
This paper presents an integrated impact analysis model for burst pipe incidents in water supply networks,offering a comprehensive evaluation of their effects.The model adjusts network parameters according to the changes in topology and nodal water demand following valve closures,and establishes a pressure-driven hydraulic model that accurately reflects variations in nodal flow rates during a burst event.A hybrid optimization algorithm that combines the Quasi-Newton method with Particle Swarm Optimization(PSO)is employed to solve the hydraulic model.Initially,PSO is utilized to identify a superior initial iteration value,after which the Quasi-Newton method is applied for a more refined local search to obtain the optimal solution.This approach effectively addresses the dependence of global gradient algorithms on initial values.Subsequently,a residual chlorine decay model is developed based on the hydraulic model,utilizing EPANET's water quality simulation engine,which employs the Lagrangian time-driven method for its solution.A case study simulates the impact of burst pipe incidents on major water transmission lines,analyzing their effects on both hydraulic and water quality parameters.The results indicate that following the incident and subsequent valve closure,there is a general decrease in both the overall residual chlorine levels and pressure within the network.Notably,the maximum reduction in pressure reaches 82％,while the maximum reduction in residual chlorine is 39％,with the impact on pressure being more pronounced.Furthermore,the downstream nodes within the valve closure area are most significantly impacted,experiencing an average pressure reduction of 77％and an average reduction in residual chlorine of 27％.Based on the simulation results,targeted measures are proposed to ensure the safe water supply of the network.These measures include the deployment of temporary water supply facilities,issuance of water outage notifications,and adjustments to chlorination points.The application of this model enhances the response efficiency of water supply enterprises to burst pipe incidents.
safety social engineeringwater supply networkpipe bursthydraulic modelhybrid Particle Swarm Optimization
万方数据
维普
