Transport and storage of bed material in a gravel-bed channel during episodes of aggradation and degradation : a field and flume study

Auteur(s) et Affiliation(s)



Description :
The AA. examine transport-storage relations during cycles of aggradation and degradation by augmenting observations of 3 events of channel aggradation and degradation in Cuneo Creek, a steep gravel-bed channel in northern California, with measurements from a series of flume runs modeling those events. Variations in channel morphology, and surface bed texture during runs that modeled the 3 cycles of aggradation and degradation were similar to those observed in Cuneo Creek and provide confidence in interpretations of the history of change : Cuneo Creek aggraded rapidly as it widened, shallowed, and braided, then degraded rapidly before armoring stabilized the channel. Such morphology-driven changes in transport capacity may explain the formation of flood terraces in proximal channels.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2011, vol. 36, n°. 15, p. 2021-2048, nombre de pages : 28, Références bibliographiques : 42 ref.

Date :
2011

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