Introducing more choices (flexibility) in the upgrading of water distribution networks: The New York city tunnel network example

Khu, ST and Keedwell, E (2005) Introducing more choices (flexibility) in the upgrading of water distribution networks: The New York city tunnel network example Engineering Optimization, 37 (3). pp. 291-305.

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Abstract

The New York city tunnel network problem is a classical case study for water distribution network rehabilitation or upgrading. However, standard problem formulations only offer single solutions based on fixed pressure head and demand requirements. This problem is re-examined through the use of multiple criteria optimization and a framework for interpreting these results is proposed. Results from previous studies were closely examined to highlight areas that can be improved. A 6-objective optimization problem was then formulated and results were compared with optimization using a single-objective genetic algorithm (GA) and 2-objectives optimization using a non-dominated sorted genetic algorithm-II. Although the initial runtime for the 6-objective optimization was long compared with single-objective GA, it provided solutions which span the whole spectrum of possibilities (in terms of pressure head requirements and cost). It is concluded that the proposed 6-objectives formulation can indeed offer more design choices, hence flexibility, for designers and decision makers. © 2005 Taylor & Francis Group Ltd.

Item Type:	Article
Divisions :	Surrey research (other units)
Authors :	Name Email ORCID Khu, ST s.khu@surrey.ac.uk Keedwell, E
Date :	1 April 2005
DOI :	10.1080/03052150512331303445
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 11:53
Last Modified :	24 Jan 2020 21:24
URI:	http://epubs.surrey.ac.uk/id/eprint/833123

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