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- Publisher Website: 10.1002/2015WR017917
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Article: Physical complexity to model morphological changes at a natural channel bend
Title | Physical complexity to model morphological changes at a natural channel bend |
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Authors | |
Keywords | depth-integrated model channel bend sediment transport secondary flow |
Issue Date | 2016 |
Citation | Water Resources Research, 2016, v. 52, n. 8, p. 6348-6364 How to Cite? |
Abstract | © 2016. American Geophysical Union. All Rights Reserved. This study developed a two-dimensional (2-D) depth-averaged model for morphological changes at natural bends by including a secondary flow correction. The model was tested in two laboratory-scale events. A field study was further adopted to demonstrate the capability of the model in predicting bed deformation at natural bends. Further, a series of scenarios with different setups of sediment-related parameters were tested to explore the possibility of a 2-D model to simulate morphological changes at a natural bend, and to investigate how much physical complexity is needed for reliable modeling. The results suggest that a 2-D depth-averaged model can reconstruct the hydrodynamic and morphological features at a bend reasonably provided that the model addresses a secondary flow correction, and reasonably parameterize grain-sizes within a channel in a pragmatic way. The factors, such as sediment transport formula and roughness height, have relatively less significance on the bed change pattern at a bend. The study reveals that the secondary flow effect and grain-size parameterization should be given a first priority among other parameters when modeling bed deformation at a natural bend using a 2-D model. |
Persistent Identifier | http://hdl.handle.net/10722/264979 |
ISSN | 2023 Impact Factor: 4.6 2023 SCImago Journal Rankings: 1.574 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Guan, M. | - |
dc.contributor.author | Wright, N. G. | - |
dc.contributor.author | Sleigh, P. A. | - |
dc.contributor.author | Ahilan, S. | - |
dc.contributor.author | Lamb, R. | - |
dc.date.accessioned | 2018-11-08T01:35:29Z | - |
dc.date.available | 2018-11-08T01:35:29Z | - |
dc.date.issued | 2016 | - |
dc.identifier.citation | Water Resources Research, 2016, v. 52, n. 8, p. 6348-6364 | - |
dc.identifier.issn | 0043-1397 | - |
dc.identifier.uri | http://hdl.handle.net/10722/264979 | - |
dc.description.abstract | © 2016. American Geophysical Union. All Rights Reserved. This study developed a two-dimensional (2-D) depth-averaged model for morphological changes at natural bends by including a secondary flow correction. The model was tested in two laboratory-scale events. A field study was further adopted to demonstrate the capability of the model in predicting bed deformation at natural bends. Further, a series of scenarios with different setups of sediment-related parameters were tested to explore the possibility of a 2-D model to simulate morphological changes at a natural bend, and to investigate how much physical complexity is needed for reliable modeling. The results suggest that a 2-D depth-averaged model can reconstruct the hydrodynamic and morphological features at a bend reasonably provided that the model addresses a secondary flow correction, and reasonably parameterize grain-sizes within a channel in a pragmatic way. The factors, such as sediment transport formula and roughness height, have relatively less significance on the bed change pattern at a bend. The study reveals that the secondary flow effect and grain-size parameterization should be given a first priority among other parameters when modeling bed deformation at a natural bend using a 2-D model. | - |
dc.language | eng | - |
dc.relation.ispartof | Water Resources Research | - |
dc.subject | depth-integrated model | - |
dc.subject | channel bend | - |
dc.subject | sediment transport | - |
dc.subject | secondary flow | - |
dc.title | Physical complexity to model morphological changes at a natural channel bend | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1002/2015WR017917 | - |
dc.identifier.scopus | eid_2-s2.0-84982224483 | - |
dc.identifier.volume | 52 | - |
dc.identifier.issue | 8 | - |
dc.identifier.spage | 6348 | - |
dc.identifier.epage | 6364 | - |
dc.identifier.eissn | 1944-7973 | - |
dc.identifier.isi | WOS:000383684400036 | - |
dc.identifier.issnl | 0043-1397 | - |