Sediment size variation in a braided reach of the Sunwapta River, Alberta, Canada

Auteur :
DAWSON, M.

Description :
The downstream diminution in sediment size in a braided reach of the proglacial Sunwapta River, was examined statistically to identify the sources of the observed variation about an expected exponential relationship between clast size and distance. Major deviations from this hypothetical relationship, such as a relative increase in grain-size, may be attributed to the effects of tributary sediment inputs and downstream changes in channel behaviour, whilst local variation is associated with complex patterns of sediment deposition observed at a bar scale. The relatively high values for the calculated diminution coefficients indicate that processes of differential transport are the main cause of the grain size decrease.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1988, vol. 13, n°. 7, p. 599-618, Références bibliographiques : 56 réf.

Date :
1988

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