High-frequency sediment transport responses on a vegetated foredune

Auteur(s) et Affiliation(s)

DAVIDSON-ARNOTT, R.G.D.

Dep. of Geography, Univ., Guelph, Belgique

BAUER, B.O.

Earth and Environmental Sciences and Geography, Univ. of British Columbia, Kelowna, 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.

Dept. of Geography and Environment, Mount Allison Univ., Sackville, Canada

CHAPMAN, C.

Dept. of Geography, Univ., Victoria, Canada

Description :
The field experiment was undertaken at Greenwich Dunes, Prince Edward Island National Park, Canada. Wind flow and sand transport intensity were measured on the seaward slope of a vegetated foredune during a 16 h storm using an array of sonic anemometers and Wenglor laser particle counters. Sand transport was initially inhibited by a brief period of rain at the start of the event but as the surface dried and wind speed increased sand transport was initiated over the entire seaward slope. Transport intensity was quite variable both temporally and spatially on the upper slope as a result of fluctuating wind speed and direction, but overall magnitudes were similar over the whole length. Transport on the beach for onshore winds is decoupled from that on the seaward slope above the small scarp when the wind angle is highly oblique, but for wind angles <45° from shore perpendicular some sand is transported onto the lower slope.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2012, vol. 37, n°. 11, p. 1227-1241, nombre de pages : 15, Références bibliographiques : 2 p.

Date :
2012

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

Langue :
Anglais