Estimation of flow resistance in gravel-bedded rivers : a physical explanation of the multiplier of roughness length

Auteurs :
CLIFFORD, N. J.
ROBERT, A.
RICHARDS, K. S.

Description :
In this paper, two contrasting approaches are used to suggest that the multiplier of characteristic grain size is attribuable to the effect of small-scale form resistance, reflecting the occurrence of microtopographic bedforms in gravel-bedded environments. Apart from improving the capacity to determine friction factors for velocity and discharge estimation, the findings have implications in general for the initial motion of gravelly bed material.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1992, vol. 17, n°. 2, p. 111-126, Collation : Illustration, Références bibliographiques : 65 réf.

Date :
1992

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