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Water Resources Management

, Volume 27, Issue 7, pp 2195–2216 | Cite as

Evaluating Water Quality Failure Potential in Water Distribution Systems: A Fuzzy-TOPSIS-OWA-based Methodology

  • M. Shafiqul Islam
  • Rehan Sadiq
  • Manuel J. Rodriguez
  • Homayoun Najjaran
  • Alex Francisque
  • Mina Hoorfar
Article

Abstract

The goal of a water distribution system (WDS) is to deliver safe water with desirable quality, quantity and continuity to the consumers. In some cases, a WDS fails to deliver safe water due to the compromise/ failure of water quality which may have devastating consequences. The frequency and consequence of a water quality failure (WQF) can be reduced if prognostic analysis and necessary remedial measures are taken on time. This study developed a prognostic model to predict WQF potential in a WDS. The study identifies important factors (parameters) which can directly and/or indirectly linked to WQFs. These factors are classified into two groups—the causes of WQF such as lack of free residual chlorine, or excess of total organic carbon, and the symptoms of WQF such as taste & odor, color which are in fact the effects of certain causes of WQF. The interrelationships among the symptoms and the causes have been established based on extensive literature review and elicited expert opinion. A fuzzy-TOPSIS-OWA-based model has been developed to identify the impacts of different influencing parameters on the overall WQF potential. The developed model has been implemented for a WDS in Quebec City (Canada). To study the impacts of uncertainties of the influencing factors, a Monte Carlo simulation-based sensitivity analysis has been carried out. It is anticipated that the developed model can help water utilities to understand the role of different factors on WQF.

Keywords

Water distribution system (WDS) Water quality failure (WQF) potential Fuzzy sets TOPSIS OWA and Monte Carlo simulations 

Notes

Acknowledgments

This research has been carried out as a part of NSERC-SPG (Strategic Project Grants) project funded by Natural Sciences and Engineering Research Council of Canada (NSERC). The authors would like to express sincere appreciation to the anonymous reviewers for their suggestion which helped to improve the quality of the article.

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • M. Shafiqul Islam
    • 1
  • Rehan Sadiq
    • 1
  • Manuel J. Rodriguez
    • 2
  • Homayoun Najjaran
    • 1
  • Alex Francisque
    • 1
    • 2
  • Mina Hoorfar
    • 1
  1. 1.Okanagan School of EngineeringUniversity of British ColumbiaKelownaCanada
  2. 2.École supérieure d’aménagement du territoireUniversité LavalQuébec CityCanada

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