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Coupled Model of Bank Erosion and Meander Evolution for Cohesive Riverbanks
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| Title: | Coupled Model of Bank Erosion and Meander Evolution for Cohesive Riverbanks |
| Authors: | Arnez Ferrel, Kattia Rubi Browse this author | | Patsinghasanee, Supapap Browse this author | | Kimura, Ichiro Browse this author | | Shimizu, Yasuyuki Browse this author →KAKEN DB |
| Keywords: | bank erosion | | meander evolution | | cantilever failure | | slump block | | cohesive river bank |
| Issue Date: | Oct-2018 |
| Publisher: | MDPI |
| Journal Title: | Geosciences |
| Volume: | 8 |
| Issue: | 10 |
| Start Page: | UNSP 359 |
| Publisher DOI: | 10.3390/geosciences8100359 |
| Abstract: | In this paper, a physics-based model that couples a bank erosion model with a meander evolution model is developed and evaluated. The physics-based bank erosion model considers the cantilever failure mechanism with slump blocks and decomposition effects. Moreover, bank accretion was considered using critical values of time required for landing, shear stresses and water depths. Two cases were tested. The first case consists of a hypothetical small-scale channel with cohesive riverbanks. Cross sections in the straight and curved part of the channel were compared to evaluate the curvature effect. Furthermore, the effect of the bank strength in the plan shape of the channel was tested in this case. The results show that the curvature increases the erosion rate in the outer bank and changes the cross-sectional profile by narrowing and widening the channel width. The plan shape of the channel changed as the bank strength was increased. In the second case, the model is compared with the River meander migration software (RVR meander) and the advantages and limitations of the model are discussed in terms of meander migration plan form and bank erosion processes. The results showed that the presented model is capable of simulating asymmetric bends. |
| Rights: | © 2018 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/). | | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/72150 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 清水 康行
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