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Impact des crues sur les bilans sédimentaires de chenaux secondaires de la Loire moyenne (France) |
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| Authors: | Stéphane Rodrigues Jean-Gabriel Bréhéret Florentina Moatar Jean-Jacques Macaire |
| Institution: | Laboratoire de géologie des environnements aquatiques continentaux (GéEAC), UPRES EA 2100, université François-Rabelais, UFR des sciences et techniques, parc de Grandmont, 37200 Tours, France |
| Abstract: | Volumes of sediments eroded and deposited during floods were quantified in a vegetated secondary channel of the Loire River at the study site of Bréhémont (France). The topographic survey highlights the temporal variability in filling of secondary channels. Upstream riffle of secondary channels governs sedimentary supply. In these channels, sediments show a by-passing in the lower parts and an accretion in the higher vegetated areas. The asymmetrical morphology is reinforced during both intense and moderate floods. Sedimentary accretion in the vegetated areas leads progressively to channel narrowing. To cite this article: S. Rodrigues et al., C. R. Geoscience 337 (2005). |
| Keywords: | Chenaux Loire Suivi topographique Zones végétalisées Transit Archivage Érosion Sédimentation France Channels Loire River Topographic survey Vegetated areas By-passing Accretion Erosion Sedimentation France |
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