北方某市供水管网对丹江口水适应性预测方法研究

Study on the prediction method on the adaptability of the water supply network on the raw water from Danjiangkou reservoir in a North China city

远距离调水是解决区域水资源不足的重要措施。为预测现役管网对新水源的适应性和输配过程中发生"黄水"的风险,对北方某市供水管网中18个监测点和丹江口水库原水进行水质分析,分别计算朗格利尔饱和指数、拉森指数和水质差异度指数,并在各监测点原位通入丹江口水进行静态浸泡试验,以判断管网是否发生"黄水"风险。结果表明,与原位通入丹江口水的静态浸泡试验结果相比,利用朗格利尔饱和指数和拉森指数判断是否发生"黄水"风险的准确率均为39%,水质差异度指数判断准确率达96%,水质差异度指数可以用于预测"黄水"发生风险。

Long-distance water transmission is a key measure to solve the problem of insufficient water resource in area.To predict the adaptability of current water supply network to the transmitted water resource and the risk of＂red water＂in transmission process,a water quality analysis on the raw water taken from 18 monitoring points in the water supply network in a North China city and from the Danjiangkou reservoir was carried out.Langelier Saturation Index,Larson Index and the Water Quality Diversity Index were calculated.Static immersion tests were made at the monitoring sites to determine if there were＂red water＂risks.The results showed that compared with the results of static immersion tests,the accuracies of Langelier Saturation Index,Larson Index and Water Quality Diversity Index in determining＂red water＂risk were 39%,39% and 96%,respectively.As a result,the Water Quality Diversity Index would be used to predict the＂red water＂risk.