Research on urban water supply pipe network accident locating based on network modeling

Improve the response capacity of the pipe network, the incident timely and effective organization of the human and material resources, a really good job in the repair work is all the more urgent and important. Pipe network system topology complex, large-scale, random changes, it is difficult to determine the current situation of the accident site, the basic work of the study accident locating-network modeling. Network modeling is the process of creating a mathematical model which simulate the water supply system, core technology´s state equation, this paper research continuity equation, energy equation, water head loss equation and so on. Static information and dynamic information used in state equation solving, the operational status of each node and pipe sections, and through a graphical network modeling process. Get the operating state of each node and the pipe´s operating status, and give network modeling process by graphical. The content of this study is of great significance for protection of urban water supply security, the level of information to improve urban management, improve emergency management capabilities.