Modelling confluence dynamics in large sand-bed braided rivers
- 1College of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, China
- 2Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China
- 1College of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, China
- 2Guangdong Provincial Key Laboratory of Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-sen University, Guangzhou 510275, China
Abstract. Confluences are key morphological nodes in braided rivers where flow converges, creating complex flow patterns and rapid bed deformation. Field survey and laboratory experimental studies have been carried out to investigate the morphodynamic features in individual confluences, but few have investigated the evolution process of confluences in large braided rivers. In the current study a physics-based numerical model was applied to simulate a large lowland braided river dominated by suspended sediment transport, and analyzed the morphologic changes at confluences and their controlling factors. It was found that the confluences in large braided rivers exhibit some dynamic processes and geometric characteristics that are similar to those observed in individual confluences arising from two tributaries. However, they also show some unique characteristics that are result from the influence of the overall braided pattern and especially of neighboring upstream channels.
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Preprint
(750 KB)
Haiyan Yang and Zhenhuan Liu
Interactive discussion


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RC1: 'Confluence dynamics in large sand-bed braided rivers', Anonymous Referee #1, 16 Jan 2019
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AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
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AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
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RC2: 'Manuscript review', Anonymous Referee #2, 04 Feb 2019
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AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
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AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
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RC3: 'comments on “Modelling confluence dynamics in large sand-bed braided rivers”', Anonymous Referee #3, 15 Feb 2019
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AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
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AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
Interactive discussion


-
RC1: 'Confluence dynamics in large sand-bed braided rivers', Anonymous Referee #1, 16 Jan 2019
-
AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
-
AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
-
RC2: 'Manuscript review', Anonymous Referee #2, 04 Feb 2019
-
AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
-
AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
-
RC3: 'comments on “Modelling confluence dynamics in large sand-bed braided rivers”', Anonymous Referee #3, 15 Feb 2019
-
AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
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AC1: 'Author's Responses to Reviewers’ Comments', HAIYAN YANG, 04 Mar 2019
Haiyan Yang and Zhenhuan Liu
Haiyan Yang and Zhenhuan Liu
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