Optimal Design of Urban Sewer Networks Underlining the Execution Aspects (Case Study: Sewer Network of Urmia City)

Document Type : Technical Note (5 pages)

Authors

1 Assistant Professor, Faculty of Civil Engineering, Urmia University of Technology, Urmia

2 MSc. in Environmental Engineering, Expert of the Technical Office, West Azarbaijan Water and Wastewater Authority.

Abstract

In this paper, a genetic algorithm method is applied for the optimal design of sewer networks. By studying the list price, records and reports of contractors of sewer network construction, a cost function is derived. This function is based on the variables of pipe diameter and slope. Obtained results show the capability of the presented model in optimal design of sewer networks. Optimization of Urmia sewer network using the proposed model leads to 13% decrease in construction cost. One of the advantages of the proposed model is considering the execution aspects and prevention of drops at pipe joints. In this research, proposing a method for calculation of rainwater, impact of rainwater on design of sewer networks is examined. According to the obtained results for the case study of Urmia city, considerable discharge of rainwater (up to 10 times of sanitary sewer discharge) enters into the sewer network. Therefore, considering the rainwater in design of sewer networks would lead to considerable increases in pipe sizes and network costs.

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References

Monzavi MT (2004) Community wastewater- Wastewater collection. Tehran University Press, Tehran, Iran (In Persian)
Afshar MH, Sotoodeh MH (2008) Optimal design of the sewer networks with the genetic algorithm. Journal of Engineering Science, Iran University of Science and Technology 19(2):37-48 (In Persian)
Zeferino JA, Antunes AP, Cunha MC (2010) Multi-objective model for regional wastewater systems plane. Journal of Civil Engineering and Environmental Systems 27(2):95-106
Moeini R, Afshar MH (2014) Optimization of integrated design of wastewater treatment and sanitary sewer network using ant colony optimization algorithm. Journal of Water and Wastewater 25(89):14-24 (In Persian)
Afshar MH, Rohani M (2014) Optimal design of gravitational sewer networks with general cellular automata. Journal of Water and Wastewater 25(90):12-25 (In Persian)
Technical office of West Azarbaijan water and wastewater authority (2006) Report of Urmia sewer network project. (In Persian)
Mahdavi M (1999) Applied hydrology. Tehran University Press, Tehran, Iran (In Persian)
 
Iran-Water Resources Research
Volume 13, Issue 2
September 2017
Pages 215-220

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History

  • Receive Date: 28 June 2016
  • Revise Date: 27 August 2016
  • Accept Date: 27 August 2016

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