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PORTAIL D'INFORMATION GÉOGRAPHIQUE

Channel avulsion on alluvial fans in southern Arizona

Auteur :
FIELD, J.

Description :
Historical aerial photographs and field observations on 5 fluvially dominated alluvial fans in southern Arizona demonstrate that channel avulsion invariably occurs where bank heights are low and often at channel bends. 5 distinct channel morphologies observed on the fans are related to different stages of the avulsion process and can be used to identify areas on a fan surface that are prone to avulsion. A descriptive model of channel avulsion illustrates how the morphology of a single channel reach will evolve through time as it captures the main flow path and is itself eventually abandoned.


Type de document :
Article de périodique

Source :
Geomorphology (Amsterdam), issn : 0169-555X, 2001, vol. 37, n°. 1-2, p. 93-104, Collation : Illustration, Références bibliographiques : 42 ref.

Date :
2001

Editeur :
Pays édition : Pays-Bas, Amsterdam, Elsevier

Langue :
Anglais
Droits :
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