Development of a fuzzy-function-based performance indicator for water distribution system's emergency condition

Hwandon Jun, Arin Gim, Sueyeun Oak, Donghwi Jung

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Emergency interconnected operation (EIO) between adjacent blocks in a water distribution system (WDS) is one of the most effective countermeasures of a water utility when abnormal conditions (e.g., suspended water supply, pipe burst) occur at a certain location. For improved WDS operation and management, calculating a reliable performance indicator that accurately represents the states of consumers under both normal and abnormal conditions is essential. In this study, a water supply performance indicator (WSPI) was developed for assessing the hydraulic performance of a WDS in terms of consumer usability and satisfaction. A fuzzy function is used to represent the consumer satisfaction with the water supply level, and the satisfaction of different consumers can be adjusted by setting the variables of the fuzzy function. The WSPI can be applied to a hydraulic analysis model based on data from an actual WDS to assess the water supply capacity for each node and the entire network. It can also be used in an advanced pressure-driven analysis model to assess the WDS performance under various abnormal conditions. The proposed WSPI was applied to six suspended water supply scenarios of an actual WDS with and without EIO to assess the effectiveness of this countermeasure.

Original languageEnglish
Article number2296
JournalWater (Switzerland)
Issue number8
Publication statusPublished - 2020 Aug


  • Consumer satisfaction
  • Emergency condition
  • Fuzzy function
  • Performance indicator
  • Water distribution system

ASJC Scopus subject areas

  • Biochemistry
  • Geography, Planning and Development
  • Aquatic Science
  • Water Science and Technology


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