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(Article of periodic en Anglais - 2012)

Document title

The response of saltation to wind speed fluctuations

Authors(s) and Affiliation(s)

PFEIFER S. (1) ; SCHÖNFELDT H.-J. (2) ;
(1) Leibniz Inst. für Troposphärenforschung, Leipzig, ALLEMAGNE
(2) Inst. für Meteorologie, Univ., Leipzig, ALLEMAGNE

Abstract

The AA. present direct measurements of the response time obtained from several field experiments. The sand transport was studied using 6 small microphones arranged in a vertical profile and collocated with a sonic anemometer, a webcam and a cup anemometer tower. Sediment transport measurements were obtained over 4 periods. The Wiener filter, a signal processing technique, is used to obtain a discrete transfer function that relates the horizontal wind speed and the non-intermittent sand transport. The transfer function can be established using an exponential function with a time constant or characteristic response time without time shift. The response time fluctuated between zero and 1.5 seconds depending on the turbulence intensity, the saltation activity, the measuring height and sampling rates

Source

Article of periodic

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

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

Millesime : 2012, vol. 37, no10 [pp. 1056-1064]

Bibliographic references : 34 ref.

Collation : 7 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3227

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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