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A comprehensive hydro-geomorphic study of cliff-top storm deposits on Banneg Island during winter 2013–2014 ArchiMer
Autret, Ronan; Dodet, Guillaume; Fichaut, Bernard; Suanez, Serge; David, Laurence; Leckler, Fabien; Ardhuin, Fabrice; Ammann, Jerome; Grandjean, Philippe; Allemand, Pascal; Filipot, Jean-francois.
Large clastic cliff-top storm deposits (called CTSDs) are one of the most remarkable signatures that characterizes extreme storm wave events on coastal cliffs. Hence, the study of CTSDs is of key importance for understanding and predicting the impacts of extreme storm wave events on rocky coasts or establishing proxies for storm intensity. The present study uses new data including hydrodynamic measurements in both deep and intertidal waters, and records of CTSDs displacement and deposition across Banneg Island during the stormy winter 2013–2014. Two drone-based surveys were carried out in January 2013 (pre-storms) and in April 2014 (post-storms). In addition, complementary field observations were carried out during the winter, providing a comprehensive and...
Tipo: Text Palavras-chave: Cliff-top storm deposit; Block transport; Extra-tropical cyclone; Run-up; Coastal erosion; Brittany.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00353/46411/46139.pdf
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Atlas de sensibilité du littoral aux pollutions marines. Dispositif opérationnel ORSEC départemental de La Réunion. Annexe technique du dispositif spécifique Polmar-Terre ArchiMer
Le Berre, Iwan; Louze, Julien; David, Laurence.
Cet atlas de sensibilité du littoral aux pollutions marines a été produit dans le cadre du projet "Elaboration des Atlas Polmar et DCE" confié par l'Etat (DEAL - La Réunion) au laboratoire universitaire LETG-Brest Géomer de Brest en lien avec la délégation IFREMER océan Indien. Le dispositif spécifique Polmar constitue un volet spécifique du dispositif opérationnel ORSEC départemental. Théoriquement révisé tous les cinq ans, il doit notamment fournir "un inventaire précis et hiérarchisé des zones à protéger en priorité". Etabli sous la forme d'un atlas de sensibilité des littoraux, annexe obligatoire du dispositif spécifique Polmar-Terre, cet inventaire est un document synthétique d'aide à la décision dans le contexte préparatoire et opérationnel de la...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00144/25479/23632.pdf
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Bilan des tempêtes de l’hiver 2013-2014 sur la dynamique de recul du trait de côte en Bretagne ArchiMer
Blaise, Emmanuel; Suanez, Serge; Stephan, Pierre; Fichaut, Bernard; David, Laurence; Cuq, Veronique; Autret, Ronan; Houron, Julien; Rouan, Mathias; Floc'H, France; Ardhuin, Fabrice; Cancouet, Romain; Davidson, Robert; Costa, Stephane; Delacourt, Christophe.
Between December 2013 and March 2014, a cluster of about 12 storm events hit the coast of Brittany with an exceptional frequency. It was in February that these storm events were the most frequent and particularly virulent. The significant wave heights measured off Finistere reached respectively 12.3 m and 12.4 m during Petra and Ulla storms on February 5 and 14. However, analysis of hydrodynamic conditions shows that only three episodes promoted extreme morphogenetic conditions because they were combined with high spring tide level. The first one occurred on January 1 to 4, it was followed by events from February 1 to 3, and March 2-3. During these three extreme events observed tide levels were above highest astronomical tide level (HAT). Maximum surge...
Tipo: Text Palavras-chave: Tempête; Érosion; Trait de côte; Marée de vive-eau; Bretagne; Surcote; Storm; High spring tide; Surge; Erosion; Shoreline; Brittany.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00310/42171/43029.pdf
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