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A Conceptual Model to Predict the Deflation Threshold Shear Velocity as Affected by Near-Surface Soil Water

I. Theory

Ghent University, Dep. Soil Management and Soil Care, International Centre for Eremology, Coupure links 653, B-9000 Gent, Belgium

View larger version (29K): [in a new window]   Fig. 1. Particle shape and water wedge according to the (a) isodiametrical sphere model of Fisher (1926), (b) the cone model of McKenna-Neuman and Nickling (free after McKenna-Neuman and Nickling, 1989), and (c) the model proposed in this study.

View larger version (24K): [in a new window]   Fig. 2. Observed water retention data of the 300- to 500-µm sized sandy loam aggregates, and the fitted Brooks and Corey model (1964; Eq. [16]), and the Rossi and Nimmo model (1994; Eq. [17]).