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Copyright © IWA Publishing 2014. The definitive peer-reviewed and edited version of this article is published in Journal of Hydroinformatics Vol.16 (2), pp. 288–301 (2014), DOI: 10.2166/hydro.2013.218 and is available at www.iwapublishing.comThis paper describes the development of an adaptive locally constrained genetic algorithm (ALCO-GA) and its application to the problem of least cost water distribution network design. Genetic algorithms have been used widely for the optimisation of both theoretical and real-world nonlinear optimisation problems, including water system design and maintenance problems. In this work we propose a heuristic-based approach to the mutation of chromosomes with the algorithm employing an adaptive mutation operator which utilises hydraulic head information and an elementary heuristic to increase the efficiency of the algorithm's search into the feasible solution space. In almost all test instances ALCO-GA displays faster convergence and reaches the feasible solution space faster than the standard genetic algorithm. ALCO-GA also achieves high optimality when compared to solutions from the literature and often obtains better solutions than the standard genetic algorithm

Adaptive locally constrained genetic algorithm for least-cost water distribution network design