Reliability assessment of water distribution systems with statistical entropy and other surrogate measures

Tiku T. Tanyimboh, Marika T. Tietavainen, Salah Saleh

Research output: Contribution to conferencePaper

Abstract

There is ever increasing commercial and regulatory pressure to minimise the cost of water distribution networks even as the demand for them keeps on growing. But cost minimizing is only one of the demands placed on network design. Satisfactory networks are required to operate above a minimum level even if they experience failure of components. Reliable hydraulic performance can be achieved if sufficient redundancy is built in the network. This has given rise to various water distribution system optimization methods including genetic algorithms and other evolutionary computing methods. Evolutionary computing approaches frequently assess the suitability of enormous numbers of potential solutions for which the calculation of accurate reliability measures could be computationally prohibitive. Therefore, surrogate reliability measures are frequently used to ease the computational burden. The aim of this paper is to assess the correlation of surrogate reliability measures in relation to more accurate measures. The surrogate measures studied are statistical entropy, network resilience, resilience index and modified resilience index. The networks were simulated with the prototype software PRAAWDS that produces more realistic results for pressure-deficient water distribution systems. Statistical entropy outperformed resilience index in this study. The results also demonstrate there is a strong correlation between entropy and failure tolerance.
Original languageEnglish
Number of pages8
Publication statusPublished - Sep 2010
EventIWA World Water Congress - Montreal, Canada
Duration: 19 Sep 201024 Sep 2010

Conference

ConferenceIWA World Water Congress
CountryCanada
CityMontreal
Period19/09/1024/09/10

Fingerprint

Water distribution systems
Entropy
Electric power distribution
Redundancy
Costs
Genetic algorithms
Hydraulics
Water

Keywords

  • redundancy
  • water distribution systems
  • statistical entropy
  • resilience index
  • reliability
  • failure tolerance
  • pressure-dependent modelling
  • pressure-deficient water distribution networks

Cite this

Tanyimboh, T. T., Tietavainen, M. T., & Saleh, S. (2010). Reliability assessment of water distribution systems with statistical entropy and other surrogate measures. Paper presented at IWA World Water Congress, Montreal, Canada.
Tanyimboh, Tiku T. ; Tietavainen, Marika T. ; Saleh, Salah . / Reliability assessment of water distribution systems with statistical entropy and other surrogate measures. Paper presented at IWA World Water Congress, Montreal, Canada.8 p.
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Tanyimboh, TT, Tietavainen, MT & Saleh, S 2010, 'Reliability assessment of water distribution systems with statistical entropy and other surrogate measures', Paper presented at IWA World Water Congress, Montreal, Canada, 19/09/10 - 24/09/10.

Reliability assessment of water distribution systems with statistical entropy and other surrogate measures. / Tanyimboh, Tiku T.; Tietavainen, Marika T.; Saleh, Salah .

2010. Paper presented at IWA World Water Congress, Montreal, Canada.

Research output: Contribution to conferencePaper

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AU - Saleh, Salah

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KW - resilience index

KW - reliability

KW - failure tolerance

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Tanyimboh TT, Tietavainen MT, Saleh S. Reliability assessment of water distribution systems with statistical entropy and other surrogate measures. 2010. Paper presented at IWA World Water Congress, Montreal, Canada.