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Pipe Networks Risk Assessment Based on Survival Analysis

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Abstract

Integrated management of pipe networks should include methods for monitoring, repairing and replacing deteriorating components (usually pipes), but also methods and everyday operating practices towards a proactive risk assessment approach in order to give a solid answer to the unavoidable “repair or replace” dilemma. The present paper attempts to check whether the Discriminant Analysis and Classification (DAC) method can be used to achieve the above mentioned goals and predict the future behaviour of network pipes. Three pipe networks carrying different types of fluids (oil; gas; and water) are used as case studies. For each case study network, the DAC method is used to classify the pipes into two groups (failures/successes), based on simple variables (pipe/network characteristics) and dimensionless joint ones. Several scenarios are being analysed for each case. The results for the two cases of oil and gas networks are very satisfying. The implementation of the DAC method to water pipe networks needs to overcome serious problems related to the quality, reliability and compatibility of the data records provided by the Water Utilities. In this paper, these shortcomings are faced combining field data with theoretical one. Also the distinction between what “failure” and “success” actually mean in a water pipe network has to be determined. The present study uses the total water volume being lost as a definition criterion.

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Authors and Affiliations

  1. Civil Engineering Department, University of Thessaly, Pedion Areos., GR 38334, Volos, Greece

    Stavroula Tsitsifli & Vasilis Kanakoudis

  2. Mechanical Engineering Department, University of Western Macedonia, Bakola and Sialvera str., GR 50100, Kozani, Greece

    Ioannis Bakouros

Authors
  1. Stavroula Tsitsifli
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  2. Vasilis Kanakoudis
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  3. Ioannis Bakouros
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Correspondence to Stavroula Tsitsifli.

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Tsitsifli, S., Kanakoudis, V. & Bakouros, I. Pipe Networks Risk Assessment Based on Survival Analysis. Water Resour Manage 25, 3729–3746 (2011). https://doi.org/10.1007/s11269-011-9881-3

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  • DOI: https://doi.org/10.1007/s11269-011-9881-3

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