Investigating the Water Losses Cost and the Effects of Pipe Grouping on Optimum Pipe Replacement Schedule in Water Distribution Networks

Document Type : Technical Note (5 pages)

Authors

1 Professor, Center of Excellence for Engineering and Management of Infrastructures, School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran

2 PhD Candidate, School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran

3 MSc graduate, School of Civil Engineering, College of Engineering, University of Tehran, Tehran, Iran.

Abstract

Aging in urban water distribution networks would lead to an increased number of bursts. Beside leakage control and pressure management, the last solution in this regard is rehabilitation and replacement of main pipes in the networks. In this research the optimum time for pipe replacement in water distribution networks is obtained by an optimization model applying genetic algorithm, which minimizes the present value of the total costs. According to the obtained results, the economic constraint increases the total costs of replacement while the hydraulic constraint would decrease it. Additionally, considering the cost of water losses and grouping replacement would increase the total costs. 

Keywords

References

Dandy, G.C., and Engelhardt, M. (2001), “Optimal scheduling of water pipe replacement using genetic algorithms,” Water Resources Planning and Management, 127(4), pp. 214–223.
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Luong, H. T., and Nagarur, N. N. (2001), “Optimal replacement policy for single pipes in water distribution networks,” Water Resources Research, 37(12), pp. 3285–3293.
Ramos, W.L. (1985). “Benefit / cost analysis procedure for determining water main replacement.” Proceedings of the National Conference of American Water Works Association. Denver. Colorado. pp. 1–13.
Shamir, U., and Howard, C.D.D. (1979), “An analytical approach to scheduling pipe replacement,” American Water Works Association, 71, pp. 248–258.
Tabesh, M., and Saber, H. (2012), “A prioritization model for rehabilitation of water distribution networks using GIS,” Water Resources Management, 26, pp. 225-241.
Iran-Water Resources Research
Volume 8, Issue 3
July 2013
Pages 83-87

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History

  • Receive Date: 23 July 2012
  • Accept Date: 31 October 2012

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