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- Title
An experimental test of whether bar instability contributes to the formation, periodicity and maintenance of pool—riffle sequences.
- Authors
Wilkinson, Scott N.; Rutherfurd, Ian D.; Keller, Robert J.
- Abstract
The article presents a physical scale model study that evaluates whether bar instability forming bars contributes to a prototype pool-riffle sequences (PRSs) formation, periodicity and maintenance. It uses a mobile-bed physical model experiment to assess whether bar instability leads to the formation of the periodic PRSs in upland rivers of gravel/cobble sediment and low width-to-depth ratio. It also evaluates the relative contributions to the maintenance of PRS bar height of channel variations associated with bar instability. It suggests that periodic PRSs are formed and maintained by the interaction between bar instability and flow deflections associated with the variation in channel geometry.
- Subjects
PROTOTYPES; GEOLOGICAL cycles; MOVABLE bed models (Hydraulic engineering); STREAMFLOW; RIVER sediments; GRAVEL; EXPERIMENTAL design
- Publication
Earth Surface Processes & Landforms, 2008, Vol 33, Issue 11, p1742
- ISSN
0197-9337
- Publication type
Article
- DOI
10.1002/esp.1645