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Multi-Objective Optimization Model Based on Localized Loops for the Rehabilitation of Gravity-fed Pressurized Irrigation Networks

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Abstract

Nowadays, some of the existing irrigation distribution networks (IDNs) are facing hydraulic performance problems, due partly to the ageing of pipe networks, initial design flaws, improper management or/and the increase in water demand. Rehabilitation of these networks may become an inevitable need to provide the best services to farmers. To this end, a comprehensive computer model was developed to assist planners and decision makers in the determination of the most cost-effective strategy for the rehabilitation of irrigation networks. This model incorporates an innovative algorithm for the automatic search of the best looping positions in the network. Two multi-objective optimizations were applied for the rehabilitation of a real medium-size network operating on-demand and by gravity, one included the looping option while the other excluded this option. The two Pareto fronts, associated with each optimization, clearly indicated that it is imperative to consider the localized loops option during the rehabilitation process as it provided superior cost-effective solutions. The comparison between two selected cases from each front showed that even though the two solutions offered the same magnitude of improvement to the network, a cost saving of about 77% is obtained by choosing the case with the looping option. The model developed in the framework of this work represents a powerful optimization tool for cost-effective rehabilitation of irrigation networks.

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Authors and Affiliations

  1. Department of Land and Water Resources Management, Mediterranean Agronomic Institute of Bari, Via Ceglie 9, 70010, Valenzano, Italy

    Abdelouahid Fouial & Nicola Lamaddalena

  2. Department of Civil, Chemical, Environmental, and Materials Engineering, University of Bologna, Viale Risorgimento 2, 40136, Bologna, Italy

    Abdelouahid Fouial & Cristiana Bragalli

  3. Department of Agronomy, University of Cordoba, Campus Rabanales, Edif. da Vinci, 14071, Cordoba, Spain

    Irene Fernández García & Juan Antonio Rodríguez Diaz

Authors
  1. Abdelouahid Fouial
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  2. Irene Fernández García
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  3. Cristiana Bragalli
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  4. Nicola Lamaddalena
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  5. Juan Antonio Rodríguez Diaz
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Correspondence to Abdelouahid Fouial.

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Fouial, A., García, I.F., Bragalli, C. et al. Multi-Objective Optimization Model Based on Localized Loops for the Rehabilitation of Gravity-fed Pressurized Irrigation Networks. Water Resour Manage 32, 465–480 (2018). https://doi.org/10.1007/s11269-017-1821-4

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  • DOI: https://doi.org/10.1007/s11269-017-1821-4

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