Study On Operation Of Water Supply Network Of Beijing South-to-North Water Transfer Project

North Water Transfer Project is to solve the severe water shortage in northern China, the implementation of large infrastructure projects, the optimization of water resources allocation. Beijing at the end of North Water Transfer Project is built along the provinces in the first, the first city to play a benefit. Beijing to form a "26213" pattern of water, that is, from two arteries, six water, two hubs, one loop and three emergency water compose comp lex water supply system. The scheduling system put forward higher requirements, changes in traffic somewhere may cause adjustment across the board scheduling scheme. Therefore, for a variety of conditions to develop a reasonable scheduling scheme it is necessary and urgent. Beijing water diversion project along the structures and more complex projects, the model must be able to reflect changes in gate opening, piping water flow Outlet watershed change control operation operating under the response process. Therefore, the study on Beijing North Water Diversion Project must be researched, and built an appropriate model of unsteady flow mechanics. The main research contents and results are as follows:(1) To schedule the program for Beijing South-to-North Water Diversion Project normal operating conditions. Gate scheduling process to meet the constraints of scheduling rules while meeting the the minimum culvert pressure of adjacent water-supply box. Firstly, using non-dominated sorting and sharing NSGA-Ⅱ to optimize the scheduling problem for gate, and obtain a Pareto set that is more than viable option; Secondly,use the DiscoveryDV software to analyze for Pareto set,and get 11 relatively better solutions that is 11 relatively better solutions; Finally,11 programs were to be preferred,that is basing on variable fuzzy sets, and draw a set of optimal solutions as scheduling scheme.(2) Uncertainty of model parameters are analyzed.In this paper, the model assumes that the Institute for the deterministic model, but the modeling process pipe roughness coefficient of local loss coefficient gates, flooding factor and other parameters have significant uncertainty. To study the effect of uncertainty on these parameters the model simulation results, the first of the sensitivity parameter analysis to identify strong sensitivity parameters, and then analyze the impact of uncertainty on sensitive parameters of the model results.(3) According to the characteristics of Beijing South-to-North Water Diversion Project, one-dimensional hydrodynamic model was established. First, introduces a variety of solution of the model, due to the high precision characteristic line method, considerations comprehensive and complex piping systems, so use the characteristic line method to solve the model. And then, validate the rationality of the model.(4) One-dimensional hydrodynamic model was used to simulate the emergency maintenance conditions overhaul, for example, for hydraulic transition process caused by the shut valve water pipe network simulation. PCCP pipe repair emergency situation by closing valves to cause fluctuations in the pipe head of view, the shorter the time off valve (faster), the greater the likelihood of the occurrence of pipeline damage; more than head off valve after a range of changes in the fluctuation amplitude is not Great. Finally, according to the pipe under pressure range, choose the best time to close the valve, simulation results can provide a reference for engineering dispatch emergency conditions.Finally, this paper summarizes the research content and achievements, and to be studied and solved in the future.