Method for efficiently screening leakage region of water supply pipe network

Abstract

The invention discloses a method for efficiently screening a leakage region of a water supply pipe network. The method comprises the steps of: dividing the water supply pipe network into virtual DMA districts; determining a leakage index of an urban pipe network; establishing a subjectively decentralized first hierarchy judgment matrix; establishing an objectively decentralized second hierarchy judgment matrix; constructing a visual AHP model by utilizing thermal map cluster; and performing overall hierarchical ranking on the virtual DMA districts from the No.1 to the No.n, verifying consistency of the overall hierarchical ranking, and screening the high leakage region of the water supply pipe network and acquiring specific problems existing in the virtual DMA districts by adopting the visual AHP model obtained in the last step if the consistency verification passes. The method solves the problems that a flow meter or a value needs to be installed on a pipeline of the DMA districts in the prior art and the screening result is inaccurate since the subjective influence in the screening of the leakage region of the water supply pipe network by utilizing the classical analytic hierarchy process is great.

Description

technical field [0001] The invention belongs to the technical field of water supply pipe networks and relates to a method for efficiently screening leakage areas of water supply pipe networks. Background technique [0002] Leakage of water supply pipes is inevitable due to aging, corrosion, fracture and other reasons. The survey shows that the average leakage rate of my country's water supply pipe network is above 20%, which is higher than the national standard of within 12%. Leakage in the water supply network not only affects the normal water supply, but also brings water quality problems. The city water department establishes metering divisions (DMA) mainly to assess leakage, production-sales difference, and pressure conditions, quickly find signs of water leakage through flow changes, and guide relevant departments to conduct purposeful inspections; according to the principles of DMA design, DMA should be For closed metering, the number of users is generally divided in...

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Problems solved by technology

[0004] In order to achieve the above purpose, the present invention provides a method for efficiently screening the leakage area of ​​the water supply pipe network, which is simple, efficient, and highly applicable, and solves the problem of installing flow meters or valves on the pipelines in the DMA partition in the prior art, and the valves are easy to cause local leakage. Insufficient pressure reduces water quality; the use of classical analytic hierarchy process to screen the leakage area of ​​the water supply pipe network has a large subjective influence, resulting in inaccurate screening results

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