Prediction models for sewer infrastructure utilizing rule-based simulation

Janaka Ruwanpura, Samuel Ariaratnam, Ashraf El-Assaly

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Management of infrastructure projects is becoming increasingly challenging due to inherent uncertainties. The most effective way to deal with uncertainty is to collect supplementary information and knowledge. When expensive or infeasible, quantification of uncertainty may be performed using analytical or simulation techniques. The City of Edmonton, Canada has approximately 4600 km of sewer pipes in the combined, sanitary, and storm sewer local systems with uncertainty issues related to deterioration. The City has taken a proactive approach with respect to sewer rehabilitation, as it is more cost-effective to repair a defective pipe prior to failure rather than after a collapse. This article demonstrates an approach for predicting the condition of a sewer pipe and the related cost of rehabilitation, given the limited data. Three models are described in this article that are developed to assist the City of Edmonton to effectively plan maintenance expenditure. Each model uses a combination of rule-based simulation and probability analysis to assist in the planning of future expenditures for sewer maintenance, thereby producing an invaluable planning tool.

Original languageEnglish (US)
Pages (from-to)169-185
Number of pages17
JournalCivil Engineering and Environmental Systems
Issue number3
StatePublished - Sep 2004


  • Civil systems
  • Infrastructure
  • Modeling
  • Sewer rehabilitation
  • Simulation

ASJC Scopus subject areas

  • Civil and Structural Engineering


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