A model of channel response in disturbed alluvial channels

Auteur :
SIMON, A.

Description :
The adjustment of channel geometry and phases of channel evolution are characterized by six process-oriented stages of morphologic development : premodified, constructed, degradation, threshold, aggradation, and restabilization. Downcutting and toe removal during the degradation stage causes bank failure by mass wasking when the critical height and angle of the bank material is exceeded (threshold stage). Channel widening continues through the aggradation stage as the slough line develops as an initial site of lower-bank stability. Alternate channel bars form during the restabilization stage and represent incipient meandering of the channel.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 1989, vol. 14, n°. 1, p. 11-26, Références bibliographiques : 29 réf.

Date :
1989

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