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Istituto Agronomico Mediterraneo di Bari (IAMB) - Centre international de hautes études agronomiques méditerranéennes (CIHEAM) 2019

Modernization of on-demand pressurized irrigation systems in Tunisia : Assessment of the flexibility impact on the cost effectiveness

Mastouri, Amel

Titre : Modernization of on-demand pressurized irrigation systems in Tunisia : Assessment of the flexibility impact on the cost effectiveness

Auteur : Mastouri, Amel

Etablissement de soutenance : Istituto Agronomico Mediterraneo di Bari (IAMB) - Centre international de hautes études agronomiques méditerranéennes (CIHEAM)

Grade : Master of science : Land and water resource management : irrigated agriculture 2019

Résumé
The Tunisian government embarked in the modernization of the irrigation schemes in the lower basin of Medjerda, foreseeing their on-demand operation. The modernized scheme of Manouba is facing the challenge of the inadequacy of the service provided. This situation implied the refusal of the users to comply with the terms of the agreement signed with the Government, and is threatening the continuity of the program. SidiThabet’s irrigation scheme, which is the subject of this research, will not be exempted from these disagreements. A thorough study of the design criteria and an analysis of performance of the designed network showed an incorrect understanding of the sensitive parameters of Clément’s first formula used to compute the discharges. The main objective of this study is to assess the correlation between these parameters and their impact on the network performance and cost, in order to develop a guideline that provides a firm technical foundation aiming to sustain and guarantee the continuity of the modernization approach. The results demonstrate that assigning higher flexibility at hydrant level insures a higher performance level, with a minor impact on the cost. It is recommended to expand the application of the developed methodology to further validate the results and to assess the impact on the pumping station and on the operation and cost of the whole system, thus mainstreaming the findings into the modernization process.

Présentation (IAMB Library)

Page publiée le 27 avril 2021