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Auteurs :
Lau, A.Y. Annie

Description :

Spécial 70 - Proceedings of the 13th International Coastal Symposium

International audience

The history of extreme wave events on the Tuamotu Archipelago of French Polynesia in the central South Pacific remains poorly understood, even though huge wave deposited coastal boulders were identified in the area decades ago. Numerous large coral boulders deposited on the reef flats of Makemo Atoll (16.56°S, 143.73°W) were investigated in this study in an attempt to understand the characteristics of extreme wave events in the region. The positions, dimensions and orientations of 286 boulders were measured along over 15 km of the northern coastline of the atoll. The biggest clast measures over 130 m 3 in size and it weighs more than 310 tonnes. The size-distribution of the Makemo boulders suggests that these huge clasts were transported by extreme storm waves. The long-axes of boulders are mostly aligned parallel to sub-parallel to the shoreline. However, a relationship between the boulder size and orientation was not found, suggesting the orientation of boulders is not representative of boulder transport mode.



Mots-clés :
tempête - cyclone tropical - rocher coralien - vague - récif coralien - atoll - Polynésie française - [SDU] Sciences of the Universe [physics] - [SDU.STU] Sciences of the Universe [physics]/Earth Sciences - [SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology - [SDU.STU.OC] Sciences of the Universe [physics]/Earth Sciences/Oceanography

Editeur :
HAL CCSD, Coastal Education and Research Foundation

Langue :
en

Type de document :
info:eu-repo/semantics/article, Journal articles

Source :
ISSN: 0749-0208; EISSN: 1551-5036; Journal of Coastal Research; https://hal.archives-ouvertes.fr/hal-01261413; Journal of Coastal Research, Coastal Education and Research Foundation, 2014, p .272-277. <10.2112/SI70-046.1>

Date :
2014-04

Contributeurs :
Department of Geography, National University of Singapore
Pôle de recherche pour l'organisation et la diffusion de l'information géographique (PRODIG) ; Université Panthéon-Sorbonne (UP1) - Institut de Recherche pour le Développement (IRD) - École pratique des hautes études (EPHE) - Université Paris-Sorbonne (UP4) - AgroParisTech - Université Paris Diderot - Paris 7 (UPD7) - Centre National de la Recherche Scientifique (CNRS)
Division of Earth Sciences [Singapore] ; Nanyang Technological University [Singapour]
Earth Observatory of Singapore ; Nanyang Technological University [Singapour]

Identifiants :
hal-01261413
https://hal.archives-ouvertes.fr/hal-01261413
DOI : 10.2112/SI70-046.1

Relations :

info:eu-repo/semantics/altIdentifier/doi/10.2112/SI70-046.1