Abstract
Evolutionary algorithms (EAs) have been used extensively for the optimal design of water distribution networks (WDNs). There is evidence in the literature that search space reduction is highly effective. However, practical methods that do not introduce extra computational requirements are lacking. A dynamic search space reduction methodology is proposed to search the entire solution space without eliminating any part of the search space beforehand. The proposed methodology works on the information explored during the execution of the algorithm. Further, a self-adaptive penalty is suggested which is based on both flow and pressure deficits instead of only pressure deficit and is obtained using pressure dependent analysis. In this study, the methodology is demonstrated using a Genetic Algorithm (GA). The effectiveness of the methodology is demonstrated on the Ramnagar Network of Nagpur City, India and two benchmark problems from the literature. The proposed methodology resulted in a substantial reduction in the computational efforts and provided nine improved solutions as compared to the best solution available in the literature for one of the networks. The techniques proposed are generic and can be incorporated in other EAs.
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All relevant data are included in the paper or its supplementary material. EPANET input files for the example network is available with the first author and can be shared on request.
Change history
01 February 2024
A Correction to this paper has been published: https://doi.org/10.1007/s11269-024-03767-2
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LRG, SD and RG conceptualised the study and developed the methodology, MAHAS helped in developing the computer code, LRG prepared first draft of the manuscript; RG, SD and TTT contributed in the analysis and manuscript preparation. All authors read and approved the final manuscript.
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Highlights
• A novel dynamic search space reduction methodology increases the efficiency of GA.
• New superior solutions achieved for a benchmark network.
• The proposed methodology is generic and can be used with other EAs.
The original online version of this article was revised: In this article ref. Palod et al. 2021 was incorrect and should have been ’Palod N, Prasad V, Khare R (2021) Redefining the application of an evolutionary algorithm for the optimal pipe sizing problem. J Water and Clim Change 12(6):2299–2313
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Gangwani, L., Dongre, S., Gupta, R. et al. Design Optimization of Water Distribution Networks with Dynamic Search Space Reduction GA. Water Resour Manage 38, 63–79 (2024). https://doi.org/10.1007/s11269-023-03648-0
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DOI: https://doi.org/10.1007/s11269-023-03648-0