北京市二环内供水管网DMA分区方法及安全性分析

Division Method and Security Analysis of District Metering Area Applied to Water Distribution Network within Second Ring of Beijing

分区计量区域(District Metering Area,DMA)作为一种有效控制管网漏失的方法,越来越受到国内外供水企业的关注。根据我国城市环状供水管网的特点并结合国外DMA划分经验,对北京市二环内供水管网进行了DMA分区规划,共划分成120个DMA。在探讨北京市DMA划分方法的基础上,建立了两个DMA示范区进行应用实践,检验了DMA分区方法的安全性与合理性,为DMA的深入研究做准备。DMA安全性研究是检验分区后DMA内部的供水水压和水质变化。通过对示范区内水压和水质的监测,发现只要DMA规划合理,控制好DMA的用户数和管线长度,正确选择进水口,就完全可以保证DMA区域内的水压与水质满足用户需求和供水安全。

As an effective leakage control strategy for water distribution network, the district metering area （DMA） has attracted more and more attention from domestic and foreign water supply enterpri- ses. Taking major characteristics of the looped water distribution networks in Chinese cities and foreign DMA experiences into consideration, the water distribution network within the second ring of Beijing City was divided into 120 DMAs in total. Based on the discussion on the division method of DMA in Beijing, two pilot DMAs were established to verify the security and rationality of the division method and to prepare the further research on DMA. The security research involves examining the variation in water pres- sure and quality in DMA. Through monitoring the water quality and pressure, it is found that the water quality and pressure in DMA can be ensured to meet the consumer needs and the water distribution security, provided that the DMA plan is reasonable, that is to say effectively controlling the consumer number and pipeline length in DMA and correctly selecting the water inlet.