Recalibrating aeolian sand transport models

Auteur(s) et Affiliation(s)

SHERMAN, D.J.

Dept. of Geography, Univ. of Alabama, Tuscaloosa, Etats-Unis

LI, B.

Dept. of Geography, Trent Univ., Peterborough, Canada

ELLIS, J.T.

Dept. of Geography and Marine Science Program, Univ. of South Carolina, Columbia, Etats-Unis

FARRELL, E.J.

Inst. of marine and Coastal Sciences, Rutgers Univ., New Brunswick, Etats-Unis

MAIA, L.P.

Inst. de Ciéncias do Mar, Univ. Federal do Ceará, Fortaleza, Bresil

GRANJA, H.

Dept. de Ciéncias da Terra, Univ. do Minho, Braga, Portugal

Description :
A quality-controlled data set comprising measurements of aeolian sand transport rates obtained at 3 disparate field sites is used to evaluate 6 commonly employed transport rate models (those of Bagnold, Kawamura, Zingg, Owen, Hsu, and Lettau and Lettau) and to recalibrate the empirical constants in those models. Shear velocity estimates were obtained using the von Kármán constant and an apparent von Kármán parameter. Models were recalibrated using non-linear regression and non-linear regression with least-squares lines forced through axes origins. Evaluation of the results suggests that the estimations of threshold shear velocity may be too slow, causing errors in predicted transport rates.

Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2013, vol. 38, n°. 2, p. 169-178, nombre de pages : 10, Références bibliographiques : 2 p.

Date :
2013

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais