配水管网中浊度影响因素分析及建模

Analysis of influencing factors on turbidity in water distribution network and model establishment

为了更有效降低配水管网中浊度,定量评估其安全性,优化配置水质在线监测器,以某市J区供水管网为研究对象,对其中的13个取样点进行水质监测,分析了配水管网中影响浊度的主要因素。结果表明:浊度沿配水管线呈现总体上升的趋势,小幅度趋于稳定,甚至有所降低。引起管网水浊度增加的主要因素有管道属性、水力工况条件、有机物含量、水力停留时间等。基于层次分析法建立了数学模型以研究各因素的重要程度,其中管道属性、水力工况条件对浊度影响明显,有机物含量、水力停留时间影响较小。通过建模,可对配水管道内的浊度变化做出科学、准确的预判,为供水企业制定相应的浊度管理策略提供支持,保障供水水质安全。

In order to effectively reduce turbidity in water distribution network,quantitatively evaluate the water safety,and optimize location of on-line monitor,taking the water distribution network in the J district of one city as a case,the water quality of 13 sampling points in the network was monitored and main influencing factors on turbidity were analyzed. The results showed that the change of turbidity along the water distribution line presented an overall trend of rise,but it could be kept stable,and even decrement in some parts. The main factors which could increase the turbidity included pipeline property,hydraulic condition,content of organic matters,hydraulic retention time and so on. Through the analysis of the influencing factors,a mathematical model based on the analytic hierarchy process(AHP） was established to understand the importance of the factors,and it indicated that pipeline property and hydraulic condition had obvious influence,while the content of organic matter and the hydraulic retention time had less influence. A scientific and accurate prediction on the possible change of turbidity caused by water distribution pipeline could be obtained through modeling,which could provide support for water supply enterprises to develop corresponding turbidity management strategy and ensure the safety of water quality.