Channel bifurcation in braided rivers: Equilibrium configurations and stability.
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| Title: | Channel bifurcation in braided rivers: Equilibrium configurations and stability. |
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| Authors: | Bolla Pittaluga, M.1, Repetto, R.2, Tubino, M.3 |
| Source: | Water Resources Research. 2003, Vol. 39 Issue 3, pn/a-n/a. 13p. |
| Abstract: | We investigate the equilibrium configurations and the stability of river bifurcations in gravel braided networks. Within the context of a one-dimensional approach, the nodal point conditions play a crucial rule, as pointed out by Wang et al. [1995] who propose an empirical relationship relating water and sediment flow rates into the downstream branches. In the present paper, an alternative formulation of nodal point conditions is proposed based on a quasi two-dimensional approach. The results show that, if the Shields parameter of the upstream channel is large enough, the system only admits of one solution with both branches open, which is invariably stable. As the Shields parameter of the upstream channel decreases, two further stable solutions appear characterized by a different partition of water discharge into the downstream branches: in this case, the previous solution becomes unstable. Theoretical findings are confirmed by the numerical solution of the nonlinear one-dimensional equations. [ABSTRACT FROM AUTHOR] |
| Copyright of Water Resources Research is the property of Wiley-Blackwell 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: 87143980 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Channel bifurcation in braided rivers: Equilibrium configurations and stability. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Bolla+Pittaluga%2C+M%2E%22">Bolla Pittaluga, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Repetto%2C+R%2E%22">Repetto, R.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Tubino%2C+M%2E%22">Tubino, M.</searchLink><relatesTo>3</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Water+Resources+Research%22">Water Resources Research</searchLink>. 2003, Vol. 39 Issue 3, pn/a-n/a. 13p. – Name: Abstract Label: Abstract Group: Ab Data: We investigate the equilibrium configurations and the stability of river bifurcations in gravel braided networks. Within the context of a one-dimensional approach, the nodal point conditions play a crucial rule, as pointed out by Wang et al. [1995] who propose an empirical relationship relating water and sediment flow rates into the downstream branches. In the present paper, an alternative formulation of nodal point conditions is proposed based on a quasi two-dimensional approach. The results show that, if the Shields parameter of the upstream channel is large enough, the system only admits of one solution with both branches open, which is invariably stable. As the Shields parameter of the upstream channel decreases, two further stable solutions appear characterized by a different partition of water discharge into the downstream branches: in this case, the previous solution becomes unstable. Theoretical findings are confirmed by the numerical solution of the nonlinear one-dimensional equations. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Water Resources Research is the property of Wiley-Blackwell 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: 10.1029/2001WR001112 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: n/a Titles: – TitleFull: Channel bifurcation in braided rivers: Equilibrium configurations and stability. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Bolla Pittaluga, M. – PersonEntity: Name: NameFull: Repetto, R. – PersonEntity: Name: NameFull: Tubino, M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: 2003 Type: published Y: 2003 Identifiers: – Type: issn-print Value: 00431397 Numbering: – Type: volume Value: 39 – Type: issue Value: 3 Titles: – TitleFull: Water Resources Research Type: main |
| ResultId | 1 |
