城市供水管网DMA的建立方法与工程实例

Establishment approaches and application cases of DMA in municipal water supply network

在地理信息系统(GIS)基础上对某城市供水管网进行独立计量区域(DMA)规划后,通过三个DMA示范区的工程实施,总结了DMA建立过程中的经验教训,形成了对国内大中型城市供水管网具有普遍指导意义的DMA建立方法。该方法共包含现场调查、安装新阀门和新管段、零压测试、试压、流量计选择与安装、检漏修漏与确定最小夜间流量的基准值等几个步骤,并提出了DMA建立方法的优化与改进措施。

After having built the district metered areas（DMA） based on the geographic information system（GIS） of an urban water supply network,the engineering practice of three demonstration zones was carried out.The appropriate approaches for DMA establishment,which would provide general guidance to all water supply networks of large and medium-sized Chinese cities,were proposed by summarizing the experiences and lessons learned from the engineering practice.These approaches normally consisted of a series of sequential steps such as on-site investigation,new valve and pipe installation,zero-pressure test,operating pressure test,flowmeter selection and installation,leakage detection and reparation,and minimum night flow benchmark value determination.Besides,the further optimization and improvement measures for DMA establishment were proposed.