An integrated ANP and er condition assessment model for sewer pipelines

Alaa Hawari, Firas Alkadour, Tarek Zayed

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


As sewer networks age, the need for their maintenance arises. Simultaneously, inadequate rehabilitation of sewer pipelines might cause catastrophic failures. Thus, municipalities worldwide must have a detailed knowledge on their networks condition. New condition assessment models for gravity and pressurized sewer pipelines were developed using ANP, FST, and ER. Seventeen factors were considered for gravity network in addition to the operating pressure for pressurized network. The considered factors were grouped under physical, environmental and operational categories. Based on the obtained results, the three main categories were found to be almost equally important for gravity pipelines. On the other hand, the environmental category was found to have the highest impact with more than 50% effect on pressurized pipelines, while the operational category was found to have the lowest impact with a 5% effect. The sub-factors recorded importance weights varying within the range of 8% for gravity pipelines and 15% for pressurized pipelines. The "Ground Disturbance" factor was found to be the most influential factor followed by the "Location" factor. On the other hand, the least affecting factors were "Length" and "Diameter". The obtained results were validated with 15%, 85%, 0.12, 0.15, and 893 for AIP, AVP, MAE, RMSE and fi, respectively. The proposed condition assessment model can provide key personal and decision makers with a proper tool to plan their inspections, collect only necessary data and provide cost effective rehabilitation and maintenance action.
Original languageEnglish
Title of host publicationInternational No-Dig 2015 Istanbul Conference and Exhibition
PublisherInternational Society for Trenchless Technology
Publication statusPublished - 1 Jan 2015
Externally publishedYes
Event33rd Annual International No-Dig Istanbul Conference and Exhibition - WOW Istanbul Convention Center, Istanbul, Turkey
Duration: 28 Sep 201530 Sep 2015


Conference33rd Annual International No-Dig Istanbul Conference and Exhibition

ASJC Scopus subject areas

  • Geology
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Mechanical Engineering
  • Geophysics

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