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The paper deals with the problem of current assessment of emergency conditions and diagnostics of emergency pipelines location in water supply and distribution systems (WSDS) in conditions that allow maintaining the quality of water supply network functioning at a certain target level. The diagnostic process here consists of the following three stages: detection of the fact of the accident, assessment of the quality level of the system operation and search of the emergency area. To solve the problem, the researchers resort to the method of discriminative analysis. This method makes it possible to use information about the values of such controlled parameters as pressure at the network certain points and discharge in the network sections thus assessing if the technical condition under diagnosis belongs to one of the emergency subsets. The method also involves the decision procedure constructed in the multidimensional space of the observed indicators proving the emergency conditions.

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