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(Article of periodic en Anglais - 2012)

Document title

High resolution sensors in space and time for determination saltation and creep intensity

Authors(s) and Affiliation(s)

SCHÖNFELDT H.-J. (1) ;
(1) Inst. für Meteorologie, Univ., Leipzig, ALLEMAGNE

Abstract

This paper reports the development and field testing of two sand transport sensors. The first one, a webcam commonly used with personal computers, is a new device in aeolian research. The devices are tested under field conditions. The second sensor is a small-sized "saltiphone"-type device made of simple loud speakers with a diameter of 15 mm as used in MP3 players. Both signals and the sum of microphone impacts over 15 minutes are compared to data gathered using a Guelph sand trap, and very good agreement is found. Measurements in a wind tunnel using sieved natural sand indicate that the webcam can be used to infer additional information about the grain size. As an application, the fluid and impact thresholds for aeolian sand transport are investigated in field measurements by analysing the onset and breakdown of saltation in gust and lull intervals of rising and falling wind speeds, respectively. In this way, constitutive equations for sand transport in terms of the wind speed can be tested

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. 1065-1073]

Bibliographic references : 41 ref.

Collation : 10 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.3228

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