Monitoring coastal evolution and associated littoral hazards of French Guiana shoreline with radar images |
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| Authors: | Hervé Trebossen Benoît Deffontaines Nicolas Classeau Jacob Kouame Jean-Paul Rudant |
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| Institution: | 1. Laboratoire des géomatériaux et géologie de l''intérieur, université de Marne-la-Vallée, 5, bd Descartes, 77454 Marne-la-Vallée cedex, France;2. Section de géodésie géophysique, service hydrographique et océanographique de la Marine, 13, rue du Châtelier, BP 426, 29275 Brest cedex, France |
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| Abstract: | This paper aims at illustrating different case examples of monitoring active coastal evolutions using remote sensing synthetic aperture radar images (ERS 1–2 and Envisat) in humid tropical areas. Effectively, the radar satellite images may be acquired under most climate conditions, especially in cloudy tropical areas. As case examples, we studied herein French Guiana shoreline and its fast evolution under the combined influences of sea currents, sediments and swells. We focused on two aspects of French Guiana littoral evolution: (1) sedimentation and erosion processes linked to mud banks displacements around Kourou City, and (2) around Iracoubo village. Lastly, we compared this short-term sedimentation balance with long-term data showing the discrepancies of short- and long-term littoral evolutions on whole French Guiana. To conclude, this work demonstrates the importance of SAR imagery to provide high-quality and high-frequency update geographic information for coastal management and littoral hazards especially in such tropical humid and cloudy areas. To cite this article: H. Trebossen et al., C. R. Geoscience 337 (2005). |
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| Keywords: | SAR remote sensing Shoreline Coastal erosion Sedimentation Nautical chart French Guiana Scènes RSO Trait de côte Érosion côtière Sédimentation Cartes marines Guyane française |
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