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Understanding failure rates in cast iron pipes using temporal stratification
journal contribution
posted on 2023-05-17, 19:31 authored by Silinis, P, Franks, SWThe need for proactive replacement schedules in the management of water supply infrastructure is highlighted by the ever-increasing cost of reactive repairs. Proactive replacement schedules require models of asset performance, and, in turn, these models require appropriate stratifications of the data in order to produce subgroups that are expected to behave uniformly over time. This paper outlines a new approach to determine relevant temporal stratifications through an examination of historical performance. This represents a novel alternative to current practice where stratification regimes are identified using a priori knowledge of criteria deemed relevant. A key advantage of using the actual break histories to identify appropriate stratifications lies in the ability to identify changes in behaviour that may not be reflected in a priori criteria. In an example using Hunter Water Corporation break data a significant change is discovered and found not to correlate with previously hypothesised partition criteria. A possible cause for the change in behaviour is suggested.
History
Publication title
Urban WaterVolume
4Pagination
1-7ISSN
1573-062XDepartment/School
School of EngineeringPublisher
Taylor and FrancisPlace of publication
UKRights statement
Copyright 2007 Taylor and FrancisRepository Status
- Restricted