Consulta: subjectFacets:"Shoreline"
Registros recuperados: 3
Data/hora: 05/06/2024 12:44:24

Bilan des tempêtes de l’hiver 2013-2014 sur la dynamique de recul du trait de côte en Bretagne
Provedor de dados: 5
Autores: 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

Shoreline Extraction from WorldView2 Satellite Data in the Presence of Foam Pixels Using Multispectral Classification Method
Provedor de dados: 5
Autores: Minghelli, Audrey; Spagnoli, Jérôme; Lei, Manchun; Chami, Malik; Charmasson, Sabine.
Foam is often present in satellite images of coastal areas and can lead to serious errors in the detection of shorelines especially when processing high spatial resolution images (&lt;20 m). This study focuses on shoreline extraction and shoreline evolution using high spatial resolution satellite images in the presence of foam. A multispectral supervised classification technique is selected, namely the Support Vector Machine (SVM) and applied with three classes which are land, foam and water. The merging of water and foam classes followed by a segmentation procedure enables the separation of land and ocean pixels. The performance of the method is evaluated using a validation dataset acquired on two study areas (south and north of the bay of Sendaï—Japan)....
Tipo: Text
Palavras-chave: Shoreline; Foam; Classification; WorldView-2; Multispectral; High resolution satellite images.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00649/76116/77079.pdf

Esquisse d'un bilan écologique provisoire de l'impact de la marée noire de l"Amoco-Cadiz" sur le littoral
Provedor de dados: 5
Autores: Chasse, C.
The wreckage of the tanker "AMOCO CADIZ" on the reefs of PORTSALL was the fourth oil spill in ten years on the coast of Brittany : it also is the largest known oil spill in the world. The patches at sea were driven eastward by westerly winds from March 17 to March 23. 140 Km of coast line was polluted. The oil spreaded more slowly towards the north west, south and north west where it spoiled some 375 Km of touristic sea coast and important fishing grounds. The coastline is six kilometers wide ; it includes islands and large reefs. The local tidal currents are very strong and reach more than three knots, during spring tides which may rise up to nine meters in a rough sea conditions. The turbulence of the water soon disper­sed the slicks and mixed the oil...
Tipo: Text
Palavras-chave: Marée noire; AMOCO CADIZ; Bretagne; Bilan écologique; Littoral; Oil spill; AMOCO CADIZ; Brittany; Ecological assessment; Shoreline.
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00306/41722/40933.pdf