Multiobjective design of sewer networks

Document Type: Research Paper

Authors

1 Institute for Sanitary Engineering , Department of Water Quality and Solid Waste Management, University of Stuttgart, Stuttgart, Germany.

2 Department of Civil Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran

3 Institute for Sanitary Engineering, Department of Water Quality and Solid Waste Management, University of Stuttgart, Stuttgart, Germany.

Abstract

The sewer layout in flat areas significantly influences the construction and operational costs as well as reliability of the network performance. To find an optimum design of sewer networks for flat areas, this study presents a multi-objective optimization problem with the objective functions of 1- the cost and 2- the reliability. The reliability criterion is defined as the effect of a clogging in a sewer on its upstream population. To solve the problem, the NSGA-II Algorithm is coupled to two self-adaptive design algorithms for generating the layout and sizing of sewers. A case study is solved using the proposed model to demonstrate its application and advantages.

Keywords


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