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A two-parameter Weibull function to describe airborne dust particle size distributions by Ted M. Zobeck; Thomas E. Gill; Thomas W. Popham is a Environmental Science article available to read on EtoBox.

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A number of mathematical distributions have been proposed for the description of the particle size distribution of unconsolidated sediments. However, few studies have mathematically described aeolian dust particle size distributions. Recent work has shown mathematically how the sequential fragmentation of materials leads to a Weibull distribution. Since the breakage of aggregates by saltating grains is a primary mode of aeolian dust production, we test the hypothesis that the Weibull distribution may be used to describe airborne soil grains. Surface samples were collected from 52 sites including soils, dirt roads and roadside ditches in the Southern High Plains of west Texas. The samples were tumbled in the Lubbock dust generation, sampling and analysis system to generate a dust cloud. The particle size distribution of the dust was measured in situ by laser diffraction and PM 10 concentration was determined gravimetrically (PM 10 = airborne particulate matter with diameter 10 "m). This study demonstrated that the Weibull cumulative distribution function (c.d.f.) is an excellent choice to describe the particle size distribution of dust suspended from mineral sediment. A Weibull c.d.

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Author

Ted M. Zobeck; Thomas E. Gill; Thomas W. Popham

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0360-1269)

Published

1999

Language

EN

Field

Environmental Science (Physical Sciences)