Research On Early Warning Systems Of Water Quality For Urban Water Supply Network

With the quality of urban water supply problems have become increasingly prominent, People increasingly concerned about the security issues of city tap water. Urban water supply networks existing pipeline maintenance, pipeline corrosion, pipeline infiltration, disinfection by-products and terrorist attacks affected the quality of water supplies, and other issues. At the same time, networks have features such as the complex of distribution, wide range and hidden underground. It is difficult to find the accident has occurred and to identify sources of pollution and endanger the region then carry out effective treatment and rehabilitation when absence of water supply enterprises to establish an effective early warning monitoring system, resulting in a significant impact. For the protection of water quality in the network, this thesis put forward establish early warning systems of water quality for urban water supply network .By requirement analysis, proposed the frame of early warning systems of water quality for urban water supply network and subsystems functional framework, The system should take network quality monitoring system and network quality of management information systems as a basis for day-to-day operation and management, At the same time supporting the building of emergency system. Pointed out that enterprises should strengthen the supply capacity of on-line monitoring and emergency detection capabilities to improve the quality of the contingency plans for emergencies.The hydraulics and water quality dynamic simulate technology of water pipe network is an effective technical means to improve water management and service level. It is also a key basis to achieve the water supply network's early warning function. In the basis of exoatiate on the principle of the pipe network's hydraulics and water quality, depth analysis the hydraulics and water quality simulate technology in EPANET software, consider the arithmetic is advanced , high computational accuracy and perfect network modeling,in particular its second development tools provided by the EPANET TOOLKIT, It is feature-rich, easy to use and can be applied to a variety of network computing research. Using EPANET TOOLK example of a secondary development to solve simulation calculation work of network's residual chlorine. According to online water quality monitoring sites not only for the conventional monitor the situation of water supplies'quality, but also ensure monitoring the incident quickly and set the goal of pollution incidents after water quality sudden affair. Proposed the monitoring node optimal layout algorithm that based on the largest monitor water consumption. Use Lingo software to a larger network for example. The results for the proposed of monitoring large scope, monitoring important position and monitoring response fast.Finally, on Visual Basic as the development platform, use interactive data technology developed water quality monitoring data and early warning alarm management software. Software has feature such as historical data for monitoring, historical data trends show, real-time data monitoring and early warning alarm feature list. Historical data for statistical analysis operate, early-warning alarm feature can be used under certain alarm mechanism tips and information voice prompts warning information release form.