Sewerage infrastructure: fuzzy techniques to model deterioration and manage failure risk

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TypeBook Chapter
ConferenceProceedings of the NATO Advanced Research Workshop on Water Reuse - Risk Assessment, Decision-Making and Environmental Security: 12 October 2006, Istanbul, Turkey
Pages241252; # of pages: 12
Subjectsewerage infrastructure, deterioration modelling, fuzzy sets, failure risk management, inspection; Sewers
AbstractAn approach is presented to model the deterioration of buried, infrequently inspected infrastructure, using scarce data. The robustness of the Markov process is combined with the flexibility of fuzzy mathematics to arrive at a decision framework that is tractable and realistic. In applying this approach to sewerage infrastructure we convert the scoring schemes used by current guidelines into fuzzy condition ratings. A rule-based fuzzy Markov model is used to replicate and predict the possibility of failure. The possibility of failure is combined with fuzzy failure consequences to obtain the fuzzy risk of failure throughout the life of the asset. The model can be used to plan the renewal of the asset subject to maximum risk tolerance. The concepts are demonstrated using data obtained from Canadian municipalities.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number49501
NPARC number20377666
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Record identifier09652068-a3c5-4d55-b02f-ea7fd94ce4f2
Record created2012-07-24
Record modified2016-05-09
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