Life-cycle cost based rehabilitation plan for water mains

Khaled Shahata, Tarek Zayed

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

4 Citations (Scopus)

Abstract

According to the Canadian National Research Council reports, the renewal and rehabilitation of infrastructure across Canada is estimated to be at least $15 billion. Life cycle cost is an essential approach to distinguish alternative rehabilitation strategies for water main rehabilitation. Therefore, Life-cycle cost is used to compare different alternative strategies among water main rehabilitation techniques. Current research identifies several rehabilitation methods for water mains, which are classified into three main categories: (1) repair (e.g. open trench, sleeves); (2) renovation (e.g. slip lining, cement lining, epoxy lining, CIPP); and (3) replacement (e.g. pipe bursting, micro-tunneling, directional drilling, auger boring, open cut). Stochastic life cycle cost (SLCC), using Monte Carlo simulation approach, is used to compare different rehabilitation scenarios within the same alternative. Data, related to the cash flow of each scenario, are collected from contractors and municipalities in Canada. Results show that using "Open Trench" and "Slip-Lining" are the best methods for "repair" and "renovation" categories, respectively. However, the best method for "replacement" category is pipe bursting for small pipe diameters (<30″) and open cut for large pipe diameters (>30″). Accordingly, a rehabilitation plan, based on SLCC, favors repairing with "Open Trench" until the breakage rate reaches 0.5 breaks/ km/year then replaces the main.
Original languageEnglish
Title of host publicationWorld Environmental and Water Resources Congress 2008
Subtitle of host publicationAhupua'a - Proceedings of the World Environmental and Water Resources Congress 2008
Volume316
DOIs
Publication statusPublished - 1 Dec 2008
Externally publishedYes
EventWorld Environmental and Water Resources Congress 2008: Ahupua'a - Honolulu, HI, United States
Duration: 12 May 200816 May 2008

Conference

ConferenceWorld Environmental and Water Resources Congress 2008: Ahupua'a
Country/TerritoryUnited States
CityHonolulu, HI
Period12/05/0816/05/08

Keywords

  • Life cycles
  • Rehabilitation
  • Water distribution systems

ASJC Scopus subject areas

  • Management, Monitoring, Policy and Law
  • Pollution
  • Water Science and Technology

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