供水管网DMA分区在实际案例中的研究

Research on DMA partition of water supply pipe network in practical cases

通过实地考察选择独立封闭的供水区域,以单个DMA区域为最小研究单元,结合GIS、SCADA系统和水力模型,分析了统计学法、经验法、比值法和水力模型等漏损评估方法在DMA分区案例中的应用,以及基于DMA分区水力模型在优化调度、管网改造等方面的应用。结果表明:采用统计学法评估真实漏损并不适合于案例中的情景;采用经验法、比值法和水力模型均能对区域的新增漏损进行预警,且经验法还可以粗略评估区域的漏损程度,使用水力模型可仿真模拟供水管网的运行状态,为管网改造、优化调度等提供科学、安全的依据。

Through on-site inspections,an independent and closed water supply area was selected,with a single DMA area as the smallest research unit,combined with the GIS,SCADA system and hydraulic model,the application of leakage assessment methods such as statistical method,empirical method,ratio method and hydraulic model in the DMA partition case was analyzed. The application of hydraulic model based on the DMA partition in the dispatch optimization and pipe network reconstruction was also analyzed. The results showed that the statistical method was not suitable to evaluate the true leakage in this case. The empirical method,ratio method and hydraulic model could provide early warning of new regional leakage,and the empirical method could also roughly evaluate the extent of regional leakage. The hydraulic model could be used to simulate the operation status of the water supply network, and provide a scientific and safe basis for pipe network reconstruction and dispatch optimization.