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Wind direction and complex sediment transport response across a beach–dune system

Auteur(s) et Affiliation(s)

BAUER, B.O.
Earth and Environmental Sciences and Geography, Univ. of British Columbia, Kelowna, Canada
Dep. of Geography, Univ., Guelph, Canada
WALKER, I.J.
Dept. of Geography, Univ., Victoria, Canada
HESP, P.A.
Dept. of Geography and Anthropology, Louisiana State Univ., Baton Rouge, Etats-Unis
OLLERHEAD, J.
Dep. of Geography and Environment, Mount Allison Univ., Sackville, Canada


Description :
A field study was undertaken at the Greenwich Dunes, Price Edward Island, Canada. A conceptual model is proposed which shows how near-surface wind vectors are altered for 4 regional wind conditions : (a) onshore, detached; (b) onshore-oblique, attached and deflected; (c) offshore, detached; and (d) offshore-oblique, attached and deflected. High-frequency measurements of sediment transport intensity during these different events demonstrate that predictions of sediment flux using standard equations driven by regional wind statistics would by unreliable and misleading. It is recommended that field studies routinely implement experimental designs that treat the near-surface wind field as comprising true vector quantities (with speed and direction) in order that a more robust linkage between the regional (upper air) wind field and the sediment transport response across the beach-dune profile be established.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2012, vol. 37, n°. 15, p. 1661-1677, nombre de pages : 17, Références bibliographiques : 2 p.

Date :
2012

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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