학술논문
Channel incision, evolution and potential recovery in the Walla Walla and Tucannon River basins, northwestern USA.
Document Type
Article
Author
Source
Earth Surface Processes & Landforms; Apr2008, Vol. 33 Issue 5, p784-800, 7p, 2 Black and White Photographs, 5 Diagrams, 2 Charts, 3 Graphs, 2 Maps
Subject
Language
ISSN
01979337
Abstract
The article examines controls on locations of channel incision, variation in channel evolution pathways and the time it takes to reconnect incised channels to their historical floodplains in the Walla Walla and Tucannon River basins in Washington. It states that channels incline to incision are reaches with silt-dominated valley fills, which possess sediment source areas ruled by loess deposits. Moreover, it indicates that widening is limited by accumulation of bank failure deposits at the base of river banks, which lessens lateral channel migration. Lastly, it is estimated that recovery times for incised channels are between 60 and 275 years.