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(Article of periodic en Anglais - 2009)

Document title

Form-flow interactions of an aeolian saucer blowout

Authors(s) and Affiliation(s)

HUGENHOLTZ C.H. (1) ; WOLFE S.A. (2) ;
(1) Dep. of Geography, Univ., Lethbridge, CANADA
(2) Natural Resources Canada, Geological Survey of Canada, Ottawa, CANADA

Abstract

Airflow patterns through a saucer blowout are examined from wind speed and direction measurements made during a chinook wind event. Overall, a two-fold process is identified, where south-westerly flows have greater potential for eroding the deflation basin, while westerly flows have greater potential for evacuating sand from within the blowout. Visual observations indicate that sand eroded from the deflation basin during south-westerly flows is re-distributed to adjacent zones of low wind speed until axis-parallel winds evacuate the sand through the opening in the east rim. Morphometric changes since 1994 indicate that the blowout morphology has remained relatively constant, suggesting a persistent interplay between oblique and axis-parallel wind erosion events. Collectively, these findings indicate that the angle of approach winds is an important control on saucer blowout morphodynamics

Source

Article of periodic

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

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

Millesime : 2009, vol. 34, no7 [pp. 919-928]

Bibliographic references : 1 p.

Collation : 7 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.1776

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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