Optimal budget allocation model for rehabilitation of sewer system considering social and environmental changes

Yeonsoo Kim, Woosik Jang, Seung Heon Han

Research output: Contribution to journalConference articlepeer-review


Municipalities face to challenges related to urban infrastructure, mainly related to aging infrastructure. The metropolitan area of Seoul, Korea, reported that more than half of the entire sewer systems are over 30 years old. The deteriorated sewer systems caused serious safety disaster such as sink hole and other social problems. Furthermore, these phenomena continue to accelerate because the sewer systems are seriously affected by variability of rainfall which results from the climate change and human migration from the social change. Therefore, it is necessary to do proactive rehabilitation instead of overdue maintenance considering the social and environmental change. This research presents the conceptual framework for deciding the priority for investment in the borough of Seoul which is based on the extensive evaluation for identifying the sewer pipelines which need rehabilitation work. To address the comprehensive evaluation of priority for investment, Genetic Algorithm (GA), is adopted to find optimal budget allocation for each borough which is derived from considering the technical, economic, environmental, and social aspects. The result can be used as reference to budget allocation to improve the sustainability of the sewer systems.

Original languageEnglish
JournalProceedings of International Structural Engineering and Construction
Issue number1
Publication statusPublished - 2017
Event9th International Structural Engineering and Construction Conference, ISEC-9 2017 - Valencia, Spain
Duration: 2017 Jul 242017 Jul 29

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (No. NRF-2015R1A2A1A09007327).

Publisher Copyright:
© 2017 ISEC Press.

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Architecture
  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality


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