- Title
- River restoration using pools and riffles: flow-sediment effects on bedform formation and maintenance
- Creator
- Rodríguez, José F.; De Almeida, GAM
- Relation
- 34th Hydrology and Water Resources Symposium. Proceedings of the 2012 Hydrology and Water Resources Symposium (Sydney, N.S.W. 19-22 November, 2012) p. 152-159
- Relation
- http://www.hwrs2012.org.au
- Publisher
- Engineers Australia
- Resource Type
- conference paper
- Date
- 2012
- Description
- Pools and riffles are sedimentary bed features found in many natural streams. Their rhythmic spacing along the stream length generates flow and substrate variability, which provides a variety of habitat conditions required for different aquatic species and for the same specie at different stages of its life. Pools and riffles can be degraded by physical removal or by flow regulation, which has made addition and conservation of pools and riffles a major focus of many restoration projects. In this paper we examine different flow-sediment mechanisms that contribute to the formation and maintenance of pools and riffles. These mechanisms include differential sediment mobility, variable riffle elevation control, fast sediment sorting and riffle armouring during floods, all of which are incorporated in a simple unsteady 1D flow and sediment transport model. With the help of the model we investigate conditions under which pools and riffles will be sustainable or degrade, which constitutes vital information for either restoring or maintaining pool and riffle habitats.
- Subject
- river restoration; pools and riffles; natural streams; flow-sediment mechanisms
- Identifier
- http://hdl.handle.net/1959.13/1056540
- Identifier
- uon:16059
- Identifier
- ISBN:9781922107626
- Language
- eng
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