- Title
- Variation of bed grain size distribution under unsteady flow and its effect on the long-term stability of pool-riffle sequences
- Creator
- Bayat, Esmaeel; Rodríguez, José F.; De Almeida, Gustavo A. M.; Saco, Patricia M.
- Relation
- International Conference on Fluvial Hydraulics River Flow 2016. Proceedings of the International Conference on Fluvial Hydraulics River Flow 2016 (Iowa City, IA 11-15 July, 2016) p. 1232-1237
- Publisher Link
- http://dx.doi.org/10.1201/9781315644479-194
- Publisher
- Taylor & Francis
- Resource Type
- conference paper
- Date
- 2016
- Description
- Pool-riffle morphology plays an important role in creating a diverse aquatic ecosystem. Therefore, it is of interest to study the long term stability of pool-riffle sequences, and the processes that contribute to the observed self-maintenance mechanisms. Continuous simulations supported by field data are used to track the sand fraction evolution in pools and riffles during a one-year period in order to relate it to self-maintenance. Analysis of several hydrographs indicate that not only unsteadiness can affect the self-maintenance, but also the bed grain size distribution history. The results emphasize the role of sediment size distribution before a potential reversal episode occurs. The larger amount of sand fraction in the pools promotes conditions for self-maintenance as the material will be easier to move by the next flood.
- Subject
- pool-riffle; hydrographs; pool maintenance
- Identifier
- http://hdl.handle.net/1959.13/1349369
- Identifier
- uon:30391
- Identifier
- ISBN:9781317289128
- Language
- eng
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