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EVALUATION DES RESSOURCES EN EAU DANS LE BASSIN AMONT DE L'OUM ER RBIA (MAROC) SUR LA PERIODE 1975-2015 ET PROSPECTIVE

Abstract : The upstream Oum Er Rbia watershed represents a major challenge in terms of water resources on the Moroccan scale since it largely supplies the largest irrigated agricultural area in Morocco. However, in a logic of flow management by large scale hydraulics, the volumes of water produced in the basin are stored in the reservoir of Ahmed El Hansali dam without any real knowledge in the organization of the flows (base flows, flood flows) either from a spatial or temporal point of view. The application of analytical hydrology methods on the hydrographs (1975-2015) produced at the 5 hydrometric stations located upstream of the water reservoir made it possible to calculate flood volumes and base volumes on an annual scale. The relation of these volumes with the precipitations allows to specify the differentiated hydrological behavior of each of the 5 basins which is a function of the geological nature of the grounds and the hydrogeological context. On the other hand, the correlation coefficients R² more or less strong between runoff and precipitation show that it is possible, to a certain extent, to forecast the volumes of the future water resource on the basis of projections of rainfall values in this sector of the Middle Atlas.
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Contributor : Tarik El Orfi Connect in order to contact the contributor
Submitted on : Saturday, April 9, 2022 - 1:47:01 PM
Last modification on : Wednesday, April 27, 2022 - 3:28:17 AM

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Tarik El Orfi, Mohamed El Ghachi, Sébastien Lebaut, Emmanuel Gille. EVALUATION DES RESSOURCES EN EAU DANS LE BASSIN AMONT DE L'OUM ER RBIA (MAROC) SUR LA PERIODE 1975-2015 ET PROSPECTIVE. Actes du XXXIV ème Colloque international de l’AIC : Changement climatique, Pénurie des ressources en eau, nexus eau/énergie et formes d’adaptation, Jul 2021, Mohammedia, Maroc. pp.164-169. ⟨hal-03636180⟩

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