Enhancing the Efficiency of the Automatic Design of Rural Drainage Networks
Publication: Journal of Irrigation and Drainage Engineering
Volume 140, Issue 6
Abstract
The discharges flowing through rural drainage networks depend not only on the local climatic and hydrologic characteristics, but also on the geometric characteristics of the channels constituting the network. For this reason, the evaluation of the design discharges should be accomplished during the search of the optimal network. This leads to time-consuming optimization procedures, and it is desirable to devise efficient numerical alternatives. Two novel models, EGA and EGA-f, are proposed in order to increase the numerical efficiency of genetic algorithms (GAs) for the solution of the optimal rural drainage network problem. Both EGA and EGA-f procedures are based on the use of the nodal excavation depths at the channel ends as decision variables. Moreover, the EGA-f procedure improves EGA by freezing temporarily the design discharges during the optimization process in the case where uniform flows through the channels can be assumed. The application of the two models is demonstrated by means of numerical experiments, confirming their superiority over existing GAs for the optimization of rural drainage networks.
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Acknowledgments
The authors want to thank the editor and the two anonymous reviewers for their observations, that contributed to improve the paper considerably.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 140 • Issue 6 • June 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Apr 13, 2013
Accepted: Dec 30, 2013
Published ahead of print: Mar 3, 2014
Published online: Mar 4, 2014
Published in print: Jun 1, 2014
Discussion open until: Aug 4, 2014
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