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Survival Rate Analyses of Watermains: A Comparison of Case Studies for Canada and Iran

Ahmad Asnaashari, Edward McBean, Bahram Gharabaghi, Reza Pourrajab and Isam Shahrour (2010)
University of Guelph; Abfa Ostan (Water & Wastewater Co.); Laboratorie de Mecanique de Lille Boulevard Paul Langevin
DOI: https://doi.org/10.14796/JWMM.R236-30
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Abstract

Frequent watermain failure is a major challenge for water utilities around the world. A quantitative picture of failure time, and the rate of failure for different types of watermains provide the opportunity for utilities to implement efficient proactive asset management strategies to minimize the overall cost of operations.

The Kaplan-Meier survival analysis is carried out for the time-to-failure in the watermains in two different case studies, one in Canada and one in Iran. At first, the time between failures for each material of watermains were estimated. Then, the rates of survival for the pre-dominant pipe materials, namely cast and ductile iron, are compared. In both data sets, cast iron pipes show fast deterioration rates relative to other types of pipe materials. The results demonstrate that cement mortar lined (CML) pipe and cathodic protection (CP) are generally promising for improving the life expectancy of metal watermains. From the engineering point of view, the results provide asset management information for rehabilitation scenarios based on a list of priority parameters.

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PAPER INFO

Identification

CHI ref #: R236-30 784
Volume: 18
DOI: https://doi.org/10.14796/JWMM.R236-30
Cite as: CHI JWMM 2010;R236-30

Publication History

Received: N/A
Accepted: N/A
Published: February 15, 2010

Status

# reviewers: 2
Version: Final published

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© 2010 CHI. Some rights reserved.

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Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

The Journal of Water Management Modeling is an open-access (OA) publication. Open access means that articles and papers are available without barriers to all who could benefit from them. Practically speaking, all published works will be available to a worldwide audience, free, immediately on publication. As such, JWMM can be considered a Diamond, Gratis OA journal.

All papers published in the JWMM are licensed under a Creative Commons Attribution 4.0 International License (CC BY).

JWMM content can be downloaded, printed, copied, distributed, and linked-to, when providing full attribution to both the author/s and JWMM.


AUTHORS

Ahmad Asnaashari

University of Guelph, Guelph, ON, Canada
ORCiD:

Edward McBean

University of Guelph, Guelph, ON, Canada
ORCiD:

Bahram Gharabaghi

University of Guelph, Guelph, ON, Canada
ORCiD:

Reza Pourrajab

Abfa Ostan (Water & Wastewater Co.), Tabriz, Azarbaijan-e-Sh, Iran
ORCiD:

Isam Shahrour

Laboratorie de Mecanique de Lille Boulevard Paul Langevin, Villeneuve d'Ascq, Lille, France
ORCiD:


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