A Leakage Monitoring Method of Urban Water Supply System Based on Dynamic DMA Partition

Abstract

The invention discloses an urban water supply system leakage monitoring method based on dynamic district metering area (DMA) partitioning. The urban water supply system leakage monitoring method comprises the following steps: a water supply network hydraulic model is established, and flow and pressure parameters of the model are corrected; traditional static DMA partitioning is determined, M connecting pipelines are arranged between DMAs, flowmeters are mounted on two of the pipelines, and remote control valves are mounted on the remaining connecting pipelines; DMA dynamic partitioning is achieved by dispatching the remote control valves; leakage alarm threshold values of the dynamic DMAs are determined; and the night flow of the dynamic DMAs is analyzed, specifically, the night flow of the dynamic DMAs is composed of legal water consumption and leakage ullage, the inlet flow and the outlet flow of the dynamic DMAs are analyzed, and if the night flow of one certain dynamic DMA exceedsthe corresponding leakage alarm threshold value at the night low-peak water utilization period, it is explained that leakage exists in the dynamic DMA. According to the method, water utilization tailends in a water supply system are reduced, and the water supply quality is improved; and the higher water supply pressure can be provided during the water supply peak so as to guarantee the peak water-supply quantity safety.

Description

technical field [0001] The invention relates to the fields of municipal engineering and urban water supply pipe networks, in particular to a method for monitoring leakage of urban water supply systems based on dynamic DMA partitions. Background technique [0002] The current problems in the field of fresh water resources are: on the one hand, the fresh water resources are scarce, the water environment is seriously polluted, and the treatment is very difficult; Resource scarcity has only worsened. The problem of pipe network leakage not only leads to the waste of water resources, but also increases the cost of production, management and maintenance of enterprises, reduces the service life of water supply infrastructure, and even causes secondary disasters such as urban water supply crisis, traffic interruption and secondary pollution of pipe network . [0003] Independent Metering Area (DMA) management of the water supply network is one of the most effective ways to reduce ...

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Problems solved by technology

[0002] The current problems in the field of fresh water resources are: on the one hand, the fresh water resources are scarce, the water environment is seriously polluted, and the treatment is very difficult; Resource scarcity only gets worse

The problem of pipe network leakage not only leads to the waste of water resources, but also increases the cost of production, management and maintenance of enterprises, reduces the service life of water supply infrastructure, and even causes secondary disasters such as urban water supply crisis, traffic interruption and secondary pollution of pipe network.

[0003] Independent Metering Division (DMA) management of the water supply network is one of the most effective ways to reduce the leakage of the pipeline network. However, the closed system created by the traditional static DMA needs to cut off many water supply pipelines ( figure 2 a), or install a flow meter on the DMA boundary pipeline, long-term operation will lead to many water quality and water safety problems

These problems mainly include ① traditional static DMA usually causes many water supply terminals, leading to the deterioration of water quality in the region, ② traditional static DMA needs to cut off many water supply pipes, which greatly disturbs the hydraulic state of the system, and water quality pollution such as "yellow water" may occur Accidents, and there is insufficient water supply pressure during the peak water consumption period, and ③ traditional static DMA boundary pipes usually install multiple flowmeters, resulting in expensive DMA construction costs and difficult maintenance

These problems have seriously limited the application of DMA partition technology in my country's actual water supply system

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