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(Article of periodic en Anglais - 2013)

Document title

Aeolian dynamics over a coastal foredune, Prince Edward Island, Canada

Authors(s) and Affiliation(s)

HESP P.A. (1) ; WALKER I.J. (2) ; CHAPMAN C. (2) ; DAVIDSON-ARNOTT R. (3) ; BAUER B.O. (4) ;
(1) School of the Environment, Flinders Univ., Adelaide, AUSTRALIE
(2) Dept. of Geography, Univ., Victoria, CANADA
(3) Dept. of Geography, Univ., Guelph, CANADA
(4) Earth and Environmental Sciences & Geography, Univ. of British Columbia, Kelowna, CANADA

Abstract

Near-surface airflow over a morphologically simple, vegetated, 8 m high foredune with a small wave-cut scarp was measured for onshore to oblique-onshore conditions during a low-moderate wind event and a high velocity sand-transporting gale event. Flow across the foredune was characterized by significant flow compression and acceleration up and across the foredune during both events. During the gale, a pronounced jet (speed bulge) developed at the foredune crest, which increased in magnitude with increasing wind speed. The vertical (W) velocity component of the 3D flow field was positive (upwards) across the stoss slope under low wind conditions but negative (downwards) during gale wind conditions, with upslope acceleration. Sediment transport during the gale force event was substantial across the beach and foredune despite the moderate vegetation cover and minimum fetch. It is shown that strong storm winds are an effective mechanism for translating sediment landwards across a high vegetated foredune, contributing sediment to the stoss slope, crest and leeward slopes of the foredune and backing dunes

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2013, vol. 38, no13 [pp. 1566-1575]

Bibliographic references : 2 p.

Collation : 11 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3444

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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