Modelling granular sediment transport over water-worked gravels
Quantifying rates and timescales of geomorphic processes : part 1. Special issue
Auteurs :HARDY, R.J.
HEIMSATH, A.
Description :
This paper reports a numerical model that calculates the transport paths of individual granular particles over a natural water-worked gravel surface. Surface topography is measured using digital photogrammetry and incorporated into a computational fluid dynamics (CFD) scheme by the application of a porosity algorithm. The predicted hydraulics determine the forces acting on each particle enabling the particle trajectory to be solved by Langrangian transport equations. The methodology demonstrates the importance of including complex topography in the numerical scheme as topographically induced hydraulic acceleration and deceleration affect both the transport mechanism and subsequent trajectory of the particle.
Type de document :
Article de monographie
Source :
Earth surface processes and landforms, issn : 0197-9337, 2005, vol. 30, n°. 8, p. 1069-1076, nombre de pages : 8, Collation : Illustration, Références bibliographiques : 28 ref.
Date :
2005
Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley
Langue :
Anglais
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)