Data/hora: 06/06/2024 05:25:08

Provedor de dados: | 5
País: | France
Título: | Dynamiques et évolutions morpho-sédimentaires de l’avant-plage du secteur littoral de Combrit – Île-Tudy entre le XIXe et le XXIe siècle
Autores: | Jabbar, Marie; Henaff, Alain; Deschamps, Anne.
Data: | 2015-01
Ano: | 2015
Palavras-chave: | Avant-plage; Morphologie sous-marine; Dynamique morpho-sédimentaire; Levés bathymétriques multi-temporels; Bretagne; Nearshore; Submarine morphology; Dynamic morphosedimentary; Multitemporal bathymetric surveys; Brittany.
Resumo: | Nearshore is an integrated part of the coastal zone, as well as beaches and coastal dunes. However, they remain poorly studied compared to the emerged part of the system, because of the limited access for scientific monitoring. The nearshore of Combrit - Ile-Tudy (south Brittany, France), addressed in this paper, is a good example. The first aim of this study is to present a methodology for the interpretation of old bathymetric surveys (supplied by the French naval hydrographic and oceanographic service SHOM) which considers all the inaccuracies related to this type of data. Then, this method is implemented in order to depict the morphological evolution of the nearshore by comparing the ancient bathymetric surveys (19th and 20th centuries) and the recent ones of the nearshore (2012). Our results indicate different trends of evolution depending upon the period considered: between 1818 and 1903 the nearshore is considerably eroding; between 1903 and 1971 the situation has reversed; the recent period 1971-2012 is submitted to erosion. These results let us to consider the origins of such variability and formulate several hypothesis implying natural factors such as wave climate modification, extreme meteorological events and also anthropogenic factors such as sand extraction and polder establishment.
Tipo: | Text
Idioma: | Francês

Identificador:

https://archimer.ifremer.fr/doc/00591/70263/68853.pdf

DOI:10.4000/geomorphologie.10849

https://archimer.ifremer.fr/doc/00591/70263/

Editor: | Groupe Francais Geomorphologie
Formato: | application/pdf
Fonte: | Geomorphologie- Relief Processus Environnement (1266-5304) (Groupe Francais Geomorphologie), 2015-01 , Vol. 21 , N. 1 , P. 45-56

Fonte:

info:eu-repo/semantics/openAccess

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