CONTRIBUTION DU SIG A LA RECONSTITUTION DES PROCESSUS DE PROGRADATION DE LA MAJERDA : quels enjeux pour le port d’Utique?

Abstract : The Majerda delta formation has been the subject of many studies since the late XIXe century. The reconstruction of the fluvial palaeo-environments of the lower Majerda valley is significant as it is critical to understand the decline of Utica following the siltation of the harbor, which is presently buried under sediments. The progression of the delta across the corridor separating the Southern and the Northern compartments of the ancient Utica bay is the cornerstone of our research on the delta. On the basis of a GIS we propose to identify hydro- and morpho-sedimentary processes of the deltaic progradation dynamics. They lead to innovative ways of considering the initial implantation site of Utica, the conditions of harbor siltation and the Majerda River itself across the Northern compartment. Observations and analysis from the GIS allowed highlighting a double system of alluvial fans over the whole delta. The first component which may be described as “torrential” is present throughout the delta fringe, while the second category of flat alluvial fans occurs at the Majerda defluviation sites, forming coalescing alluvial lobes. The ancient merging of these two morphological systems close to Utica could reflect a process of harbor silting more complex than previously considered, the Majerda River being considered as the unique factor of change so far.
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Communication dans un congrès
Première Rencontre pour l’Etude du Quaternaire en Tunisie (Qt1), 2012, Tunis – Cap Bon, Tunisie. 2015
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https://halshs.archives-ouvertes.fr/halshs-01099895
Contributeur : Hugo Delile <>
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Dernière modification le : dimanche 15 octobre 2017 - 22:44:10
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Hugo Delile, Jean-Philippe Goiran, Jean-Paul Bravard. CONTRIBUTION DU SIG A LA RECONSTITUTION DES PROCESSUS DE PROGRADATION DE LA MAJERDA : quels enjeux pour le port d’Utique?. Première Rencontre pour l’Etude du Quaternaire en Tunisie (Qt1), 2012, Tunis – Cap Bon, Tunisie. 2015. 〈halshs-01099895〉

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