Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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A Study on the Development of Optimal Renewal Planning Model in Water Supply Facilities Connected to Future Financial Plan of Water Providers

수도사업자의 장래 재정계획과 연계한 상수도시설의 최적 개량계획 수립 모델 개발 연구

  • Lim, Sanghyun (Department of Environmental Engineering, University of Seoul) ;
  • Shin, Hwisu (Department of Environmental Engineering, University of Seoul) ;
  • Seo, Jeewon (Department of Environmental Engineering, University of Seoul) ;
  • Kim, Kibum (Department of Environmental Engineering, University of Seoul) ;
  • Koo, Jayong (Department of Environmental Engineering, University of Seoul)
  • 임상현 (서울시립대학교 환경공학과) ;
  • 신휘수 (서울시립대학교 환경공학과) ;
  • 서지원 (서울시립대학교 환경공학과) ;
  • 김기범 (서울시립대학교 환경공학과) ;
  • 구자용 (서울시립대학교 환경공학과)
  • Received : 2017.02.16
  • Accepted : 2017.03.20
  • Published : 2017.04.20
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Abstract

It is considered necessary to renewal a considerable number of water supply facilities in Korea because they began to be intensively buried in the period of rapid economic growth. Accordingly, local water providers are required to take measures against this situation, but they have currently been caught in a vicious circle of the lack of budget spent in renewing water supply facilities because county-based small-scale local water supply cannot afford to cover annual expenditures with their revenues from water rates. Therefore, this study developed an optimal renewal planning model capable of achieving a balance of financial revenue and expenditure in local water supply using nonlinear programming and furthermore of minimizing the total cost incurred during the analysis. To this end, this study selected the water supply area located in County Y as a research area to build the financial revenue and expenditure and used Solver function provided by Microsoft Excel to use nonlinear programming. As a result, this study developed an optimal renewal planning model minimizing incurred costs in consideration of 6 items in the financial revenue and expenditure. The optimal renewal plan was modeled according to the available annual budget. As a result, this study proposed SICD, a scenario to minimize total costs from the perspective of water suppliers, and SITS, a scenario to minimize the increase in water rates from the perspective of consumers. It can be said that the method proposed in this study is the core of the optimal financial and renewal plans as a final stage of asset management for water supply facilities. Therefore, it is considered possible for local water providers to use the method proposed in this study according to circumstances for the asset management of water supply facilities.

Keywords

References

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