The dominance of dispersion in the evolution of bed material waves in gravel-bed rivers

Sediment transport dynamics. Special issue

Auteurs :
LISLE, T.E.
CUI, Y.
PARKER, G.
PIZZUTO, J.E.
DODD, A.M.
CHURCH, M.

Description :
This paper summarizes recent theoretical models, experiments and field studies that have been designed specifically to measure relative rates of dispersion and translation of bed material waves. In considering uniform channels only, and also in disregarding exchanges of sediment between a channel and its floodplain, 2 factors influence wave behaviour : interactions between flow, wave topography and bed load transport; and relative particle sizes of input sediment and pre-existing bed material. The results indicate that dispersion dominates the evolution of bed material waves in gravel-bed channels.


Type de document :
Congrès

Source :
Conférence internationale. Drainage basin dynamics and morphology, Jérusalem, Israel, 1999-05, Earth surface processes and landforms, issn : 0197-9337, 2001, vol. 26, n°. 13, p. 1409-1420, nombre de pages : 12, Collation : Illustration, Références bibliographiques : 37 ref.

Date :
2001

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