Rehabilitation of a water distribution system using sequential multiobjective optimization models

Rahmani, F, Behzadian, Kourosh and Ardeshir, Abdollah (2015) Rehabilitation of a water distribution system using sequential multiobjective optimization models. Journal of Water Resources Planning and Management. pp. 1-7. ISSN 0733-9496

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Abstract

Identification of the optimal rehabilitation plan for a large water distribution system (WDS) with a substantial number of decision
variables is a challenging task, especially when no supercomputer facilities are available. This paper presents an initiative methodology for the
rehabilitation of WDS based on three sequential stages of multiobjective optimization models for gradually identifying the best-known Pareto
front (PF). A two-objective optimization model is used in the first two stages where the objectives are to minimize rehabilitated infrastructure
costs and operational costs. The optimization model in the first stage applies to a skeletonized WDS. The PFs obtained in Stage 1 are further
improved in Stage 2 using the same two-objective optimization problem but for the full network. The third stage employs a three-objective
optimization model by minimizing the cost of additional pressure reducing valves (PRVs) as the third objective. The suggested methodology
was demonstrated through use of a real and large WDS from the literature. Results show the efficiency of the suggested methodology to
achieve the optimal solutions for a large WDS in a reasonable computational time. Results also suggest the minimum total costs that will be
obtained once maximum leakage reduction is achieved due to maximum possible pipeline rehabilitation without increasing the existing tanks.

Item Type: Article
Subjects: Construction and engineering > Civil and structural engineering
Construction and engineering
Depositing User: Kourosh Behzadian Moghadam
Date Deposited: 22 Mar 2016 17:02
Last Modified: 22 Dec 2016 08:55
URI: http://repository.uwl.ac.uk/id/eprint/1828

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