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Relations sédimentaires récentes et actuelles entre un fleuve et son delta en milieu microtidal : Exemple de l'embouchure du Rhône

Abstract : In order to explain the current degradation of the delta-coasts, we undertook a study on the modalities of the distribution of the river solid discharge on the littoral. Two approaches have been coupled: (1) the study of the secular evolution of the coastline and climatic and human impacts, based on the study of historical documents, and (2) the detailed study of the sedimentary mechanisms during floods, in the key zone of the river mouth.
The main results show that the delta-coast is currently disconnected from the river, because the river inputs remain stored near the mouth. The floods do not contribute either to feed the littoral, because this is primarily fine particles that are brought into the sea. For as much, the river banks are more responsible than hydraulic dams in the beaches erosion, because of the important role of avulsion mechanism in the delta-plain progradation.
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https://tel.archives-ouvertes.fr/tel-00011967
Contributor : Grégoire Maillet <>
Submitted on : Friday, March 17, 2006 - 7:19:49 AM
Last modification on : Friday, October 23, 2020 - 4:41:21 PM
Long-term archiving on: : Friday, November 25, 2016 - 10:18:20 AM

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  • HAL Id : tel-00011967, version 1

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Grégoire Maillet. Relations sédimentaires récentes et actuelles entre un fleuve et son delta en milieu microtidal : Exemple de l'embouchure du Rhône. Géomorphologie. Université de Provence - Aix-Marseille I, 2005. Français. ⟨tel-00011967⟩

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