Efficiences of sediment samplers for wind erosion measurement

• Published in: Australian journal of soil research Vol. 31; no. 4
• Main Authors: Shao, Y, Raupach, M.R. (Commonwealth Scientific and Industrial Research Organisation, Canberra (Australia). Centre for Environmental Mechanics), McTainsh, G.H. (Griffith Univ., Nathan (Australia). Faculty of Environmental Sciences), Leys, J.F. (New South Wales Conservation and Land Management, Buronga (Australia))
• Format: Journal Article
• Language: English
• Published: 1993
• Subjects: ECHANTILLONNAGE; EROSION EOLICA; EROSION EOLIENNE; GROSSEUR DES PARTICULES; MUESTREO; SEDIMENT; SEDIMENTO; TAMANO DE LA PARTICULA
• ISSN: 0004-9573; 1446-568X

The efficiency of 3 sediment samplers used for studies of wind erosion were examined: a vertically integrating trap (an active, modified Bagnold trap for measuring vertically integrated streamwise sediment fluxes, designed for use in a portable wind tunnel); and 2 single-point, passive traps, the Leach trap (a small sampler of simple design, mainly for use in wind tunnels) and the Fryrear trap (a rugged sampler for field use). The results for overall efficiency E (for aeolian sand-sized particles) are: for the vertically integrating trap, 1.02; for the Leach trap, 0.85 with a slight tendency to increase with wind speed; and for the Fryrear trap, 0.90 (with or without a rain hood). Particle size analyses, carried out on the sediments collected by the traps under test and also the isokinetic sampler (E assumed to be 1 for all particle sizes), show that the particle size distributions of the trapped sediments feature of the soils used for the tests, for which clay particles are mainly transported as small aggregates or clay skins upon sand grains.