配水管网中水质变化规律及主要影响因素分析

安全输配是饮用水水质保障的关键。在对中国南方 S 市配水管网水质大量调查的基础上，分析了余氯、浊度、铁、三卤甲烷、卤乙酸、AOC 等主要水质指标在管网中的变化规律，发现余氯沿管线逐渐降低，浊度和铁基本沿管线逐渐增加，其主要影响因素有管道属性、温度及水力条件等；三卤甲烷在管网中表现出增加的趋势，而卤乙酸则在管网中表现出降低的趋势，其主要影响因素有余氯浓度、水质条件、温度条件及水力条件等；供水系统中 AOC 以 AOC-P17为主要组分，沿供水系统有逐渐增加的趋势，其浓度、组成以及在管网中的变化规律呈现明显的季节性。

Study on water quality fluctuation and influencing factors in water distribution network

In-pipe water quality investigation was done at a city in south China and the obtaineddata on residual chlorine,turbidity,iron,THMs,HAAs and AOC was discussed.It was observed thatthe residual chlorine level was descending and the turbidity and iron were ascending alone with theprolongation of the pipeline respectively.The main influencing factors might be the properties of thepipe,the temperature and the hydraulic characteristics.Similarly the THMs ascending and HAAsdescending from the waterworks to the sampling points were observed,and the influencing factors werethe residual chlorine level,water quality,temperature and hydraulic condition.AOC-17 was theprimary component of AOC in water distribution networks.AOC gradually increased from upstream todownstream,and the concentration,components and variation of AOC were impacted by seasonalfactor.