Technological Research And Practice Of Urban Water Supply Security Platform

Water is the essential protection of social stability and development, which is lifeline ofdevelopment and existence of cities. There is an interaction and mutual complementary dialecticalrelationship between city system and water environment. On one hand, city system absorbsresources for production and living; On the other hand, it releases water pollutants to theenvironment. And then city ecosystem grows under the action of the relationship. With theinfluence of rapid development of production, explosion of population and environmentaldegradation, environment of the major of cities in China have had a deteriorating trend recently.Simultaneously, sudden severe pollution incidents frequently happened, which brought new threatto fragile water environment, and caused great losses to economic system, society and ecosystem.Currently, domestic cities have started water environment security research, analyzed of riskfactors, and developed response programs to achieve to minimize risk. However, due to differentlocation, climate and hydrological conditions, raw water conditions and purification process ofwater plants are different. And then, different economic characteristics causing differentcharacteristics of pollutants, naturally, pollution response measures are different. It is difficult tomake an adaptable and mature security system. Therefore, it is necessary to build security systemconsistent with its water environment characteristic. The article takes water supply system of acity and source water of another city in Huabei Area as examples to start water environment safetyevaluation research and trend early warning research in order to try to set up water environmentearly warning system based on safety evaluation model. And put it into practice to judge itsapplicability. The main contents of research are as follows:A new risk evaluation model will be set up for raw water. According to eutrophicationcondition of reservoir in case, utilize fuzzy comphrensive evaluation based on analytic hierarchyprocess to assess raw water eutrophication condition. After analyzing potential risks and negativefactors, eutrophication evaluation interface of reservoir will be set up in case. As is a result that theraw water quality in case is in a good condition, but low tide happens in every summer, which isbecause of temperatures rising and the total nitrogen rising induces bloom of alga in waterreservoir. And then, according to high nitrogen content’s potential risk, warning response should be proposed.Water quality safety evaluation system will be set up for urban water supply system. Byanalysis of characteristic of water supply system of city in case, index system is built and weightsof that is determined by analytic network process. Then, make use of fuzzy comprehensiveevaluation method to assess water supply system in case, which is shown that, although the resultsare passable, some potential risks do exist, such as aging pipe network, which lead to abnormalpressure and deterioration of water quality. According to the evaluation results, simulatedtransformation for water supply system in case is proposed and combining with optimizationtechnology. Furthermore, evaluate the transformation result, which will supply transformation forurban water supply system with theoretical basis and technological support. And set up safetyevaluation interface of urban water supply system based on analytic network process.By studying risk evaluation model for raw water and water quality safety evaluation systemfor urban water supply system, a water environment safety evaluation model is set up, which isapplicable for Regional water environment of northern region in China, on basis of which themature water environment safety evaluation system is built.Take water environment safety evaluation system as a core, supplemented by trend forecastfor water quality, combining with emergency plans, and set up water environment risks earlywarning system, which will be put into practice.