Water quality failure in distribution networks : a framework for an aggregative risk analysis

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ConferenceAmerican Water Works Association (AWWA) - 2003 Annual Conference: 15 June 2003, Anaheim, California
Pages111; # of pages: 11
Subjectrisk, water quality failure, fuzzy, aggregation methods, uncertainty, analytic hierarchy process, distribution network; Water quality
AbstractThe pathways through which water quality can be compromized in the distribution system may be classified into five major categories: intrusion of contaminants into the distribution system, regrowth of bacteria in pipes and storage tanks, water treatment failure, leaching of chemicals or corrosion products from system components (pipes, storage tanks, liners, etc.) and permeation of organic compounds through plastic pipe and pipe components in the system. The characterization and quantification of these risk factors is complex and highly uncertain. The current inability to precisely quantify these risks may require the usage of a quantitative-qualitative framework. In this paper, a framework for aggregative risk analysis is proposed for water quality failure in the distribution system. Each basic risk item is expressed by a fuzzy numbers, which is derived from the product of the likelihood of a failure event and its consequence. The fuzzy numbers capture vagueness inherent in the qualitative (linguistic) definitions. A multi-stage hierarchical model for water quality failure is developed. An analytic hierarchy process is used for estimating the weighting scheme for grouping risk items. The framework is demonstrated with a simplified structure of risk hierarchies for water quality in distribution systems.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number46272
NPARC number20386328
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Record identifierbb72bf5f-eba0-4d0f-b942-6da5f50f9190
Record created2012-07-25
Record modified2016-05-09
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