Channel incision, evolution and potential recovery in the Walla Walla and Tucannon River basins, northwestern USA

Auteurs :
BEECHIE, T.J.
POLLOCK, M.M.
BAKER, S.

Description :
The AA. evaluated controls on locations of channel incision, variation in channel evolution pathways and the time required to reconnect incised channels to their historical floodplains in the Walla Walla and Tucannon River basins. Controls on incision locations are hierarchically nested. The AA. show that published channel evolution models do not adequately describe the observed variation in channel form and evolution. Therefore, they propose a second evolution model. Finally, they estimate the time required for a channel to aggrade to the elevation of its former floodplain based on published aggradation rates, and examine the potential for decreasing recovery time through restoration actions.


Type de document :
Article de périodique

Source :
Earth surface processes and landforms, issn : 0197-9337, 2008, vol. 33, n°. 5, p. 784-800, nombre de pages : 17, Collation : Illustration, Références bibliographiques : 71 ref.

Date :
2008

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