Width variations and mid-channel bar inception in meanders: River Bollin (UK)
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| Title: | Width variations and mid-channel bar inception in meanders: River Bollin (UK) |
|---|---|
| Authors: | Luchi, R.1 rossella.luchi@ing.unitn.it, Hooke, J.M.2, Zolezzi, G.1, Bertoldi, W.1 |
| Source: | Geomorphology. Jun2010, Vol. 119 Issue 1/2, p1-8. 8p. |
| Subjects: | Meandering rivers, River channels, Wavelengths, Topographical surveying, Longitudinal method, Hydraulic models, Curvature, Geomorphology |
| Abstract: | Abstract: The extent and pattern of width variations along a meandering channel and its association with variation in bed topography and development of mid-channel bars have been examined through field survey evidence for a reach of the River Bollin in NW England. The wet width has been quantified along the reach by applying a hydraulic model to surveyed cross sections under a range of discharges between low flow and defined bankfull conditions. This approach allows an objective, modelling-based method to compute channel width. The high spatial resolution of the topographical survey allows capture of significant variations in the cross-sectional morphology at the meander wavelength scale. Results disclose some features of longitudinal and stage-dependent width variability in meanders. Width variation is shown to be highly correlated with curvature: at bankfull conditions width peaks in bend apex sections exceed those at inflection sections and can be up to twice greater. The width-curvature behavior is correlated with the pattern of bed and banks morphology, which is different in bend apices and in meander inflections. The survey shows that the bedform morphology can be characterized by a mid-channel bar pattern that is initiated at the inflection section and that the bedform dynamics can be closely associated with channel width variations. [Copyright &y& Elsevier] |
| Copyright of Geomorphology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 50390785 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Width variations and mid-channel bar inception in meanders: River Bollin (UK) – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Luchi%2C+R%2E%22">Luchi, R.</searchLink><relatesTo>1</relatesTo><i> rossella.luchi@ing.unitn.it</i><br /><searchLink fieldCode="AR" term="%22Hooke%2C+J%2EM%2E%22">Hooke, J.M.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Zolezzi%2C+G%2E%22">Zolezzi, G.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bertoldi%2C+W%2E%22">Bertoldi, W.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Geomorphology%22">Geomorphology</searchLink>. Jun2010, Vol. 119 Issue 1/2, p1-8. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Meandering+rivers%22">Meandering rivers</searchLink><br /><searchLink fieldCode="DE" term="%22River+channels%22">River channels</searchLink><br /><searchLink fieldCode="DE" term="%22Wavelengths%22">Wavelengths</searchLink><br /><searchLink fieldCode="DE" term="%22Topographical+surveying%22">Topographical surveying</searchLink><br /><searchLink fieldCode="DE" term="%22Longitudinal+method%22">Longitudinal method</searchLink><br /><searchLink fieldCode="DE" term="%22Hydraulic+models%22">Hydraulic models</searchLink><br /><searchLink fieldCode="DE" term="%22Curvature%22">Curvature</searchLink><br /><searchLink fieldCode="DE" term="%22Geomorphology%22">Geomorphology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Abstract: The extent and pattern of width variations along a meandering channel and its association with variation in bed topography and development of mid-channel bars have been examined through field survey evidence for a reach of the River Bollin in NW England. The wet width has been quantified along the reach by applying a hydraulic model to surveyed cross sections under a range of discharges between low flow and defined bankfull conditions. This approach allows an objective, modelling-based method to compute channel width. The high spatial resolution of the topographical survey allows capture of significant variations in the cross-sectional morphology at the meander wavelength scale. Results disclose some features of longitudinal and stage-dependent width variability in meanders. Width variation is shown to be highly correlated with curvature: at bankfull conditions width peaks in bend apex sections exceed those at inflection sections and can be up to twice greater. The width-curvature behavior is correlated with the pattern of bed and banks morphology, which is different in bend apices and in meander inflections. The survey shows that the bedform morphology can be characterized by a mid-channel bar pattern that is initiated at the inflection section and that the bedform dynamics can be closely associated with channel width variations. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Geomorphology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.geomorph.2010.01.010 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 1 Subjects: – SubjectFull: Meandering rivers Type: general – SubjectFull: River channels Type: general – SubjectFull: Wavelengths Type: general – SubjectFull: Topographical surveying Type: general – SubjectFull: Longitudinal method Type: general – SubjectFull: Hydraulic models Type: general – SubjectFull: Curvature Type: general – SubjectFull: Geomorphology Type: general Titles: – TitleFull: Width variations and mid-channel bar inception in meanders: River Bollin (UK) Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Luchi, R. – PersonEntity: Name: NameFull: Hooke, J.M. – PersonEntity: Name: NameFull: Zolezzi, G. – PersonEntity: Name: NameFull: Bertoldi, W. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 06 Text: Jun2010 Type: published Y: 2010 Identifiers: – Type: issn-print Value: 0169555X Numbering: – Type: volume Value: 119 – Type: issue Value: 1/2 Titles: – TitleFull: Geomorphology Type: main |
| ResultId | 1 |
