| As people’s living standard and health awareness is increasing, the requirement to water quality become more strict.Water supply security has profound and lasting influence to the social order, it relates with residents’ health and property safety directly. And building a thorough water safety guarantee system of water supply network is the best way to realize the safety of drinking water. The article is aiming at building water safety guarantee system of water supply network,spreads the study around five aspects including secondary pollution analysis of water quality, correlation analysis of water quality parameters, water quality simulation and prediction, network online monitoring and forewarning forecast.The article starts with the study of water quality secondary pollution in City TC,by comparing the variation of main water quality parameters between product water and pipeline water,then analyze the cause of secondary pollution and put forward some control measures. This part of research indicates that the variation of main water quality parameters have correlation,residual chlorine has good negative correlation with the total bacteria court(TBC),turbidity and iron has a good positive correlation.Then complete the water quality simulation of one community pipeline network in City TC, the results show the low pressure area and the area where residual chlorine is substandard in the community network,which can guild the initial plan of network,and can improve water supply safety and reliability. Meanwhile establish the water quality on-line monitoring system of the community network,which can control the water quality dynamic in real time.Lastly,the article takes water quality pollution in a network as en example,making a preliminary research about the valve manage which is one of accident treatment manage system.When the pollution happen,it can analyze pollution category,confirm pollutant and pollution range,then set out the best valve manage scheme,so that the harm of the pollution will be minimized.By simulating the water quality pollution,can make many emergency scheduling plans about each node every time.After collecting all the scheme,the water quality safety plans database in water supply network will be established. |