Transitory distribution of the suspended sediment in a unidirectional non-uniform flow

Martin SANCHEZ

Résumé


A 1DH modeling is implemented to study a particular case of transport in suspension along a channel corresponding to a 2DV problem. In order to include the vertical dimension, a model named α-β is used. This latter was developed to describe the vertical distribution of suspended sediment in a flow corresponding to an unsteady and/or non-uniform state, and including deposition and resuspension phenomena (SANCHEZ, 2013). Results show that in some regions of the studied domain, the α-β model describing the vertical distribution of suspended sediment, can be simplified because its two parameters (α and β) remain constant.

Mots-clés


Suspended sediment, Vertical profile of the concentration, Non-uniform flow, Transitory state, Deposition, Erosion, Mud, Sand, Model α-β.

Texte intégral :

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Références


BERKHOFF J.C.W. (1972). Computation of combined refraction-diffraction. 13th Coastal Engineering Proceedings, ASCE, Vancouver, Canada, pp 471-490.

KRONE R.B. (1986). The significance of aggregate properties to transport processes. In A.J. Mehta (Ed.), Estuarine cohesive sediment dynamics, Coastal and estuarine studies n° 14, Springer, Berlin, pp 66–84. CrossRef

SAINT-VENANT A. (1871). Théorie du mouvement non permanent des eaux, avec application aux crues des rivières et à l’introduction de marées dans leurs lits. Comptes Rendus de l’Académie des Sciences, Tome 73, Paris, pp 147-154 & 237-240.

SANCHEZ M. (2013). Nonequilibrium description of the vertical distribution of the suspended sediment transported by open surface flows, considering erosion and deposition phenomena (translated version). Revue Paralia, Vol. 6, pp 9.61-9.90. CrossRef

SANCHEZ M. (2014). Distribution non stationnaire des matières en suspension dans une couche limite oscillant à haute fréquence. XIIIème Journées Nationales Génie Côtier – Génie Civil, Dunkerque, pp 495-504. CrossRef




DOI: http://dx.doi.org/10.5150/revue-paralia.2015.s02

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