Multistate Reliability of Water-Distribution Systems: Comparison of Surrogate Measures
Publication: Journal of Water Resources Planning and Management
Volume 141, Issue 10
Abstract
Reliability of a water-distribution system (WDS) can address mechanical, hydraulics, and water quality failure in the system. The research reported in this paper focused on mechanical reliability (subsequently referred to simply as reliability) assessment of a WDS. Existing techniques are restricted to lower states of reliability (one pipe failure at a time) and very little attention has been paid to higher states (simultaneous failure of several pipes). This is due to large computational workload associated with higher-states reliability assessment. Studying various reliability measures, the research reported in this paper revealed statistical flow entropy had stronger correlation with higher states of reliability and was a better surrogate measure. A multicriteria decision analysis (MCDA) was applied to rank a set of WDS layouts (alternatives) using various states of reliabilities (criteria). The MCDA considered the relative importance of each state of reliability in the process of finding the most reliable system (decision making). The MCDA revealed the higher-state reliabilities should have more contribution in the decision-making process.
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Acknowledgments
The Natural Sciences and Engineering Research Council (NSERC) of Canada, Okanagan Basin Water Board (OBWB), and the University of British Columbia are thanked for their financial support. Cost, Time, and Quality (CTQ) Consultants Ltd. are also appreciated for their support.
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Information & Authors
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Published In
Journal of Water Resources Planning and Management
Volume 141 • Issue 10 • October 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jun 12, 2014
Accepted: Jan 30, 2015
Published online: Mar 23, 2015
Discussion open until: Aug 23, 2015
Published in print: Oct 1, 2015
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