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Lateral Momentum Fluxes at the Confluence of the Negro and Solimoes Rivers
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| Title: | Lateral Momentum Fluxes at the Confluence of the Negro and Solimoes Rivers |
| Authors: | de Lima, Adriano Coutinho Browse this author |
| Keywords: | river confluence | | turbulence | | momentum flux | | field data |
| Issue Date: | Jan-2019 |
| Publisher: | MDPI |
| Journal Title: | Geosciences |
| Volume: | 9 |
| Issue: | 1 |
| Start Page: | UNSP 7 |
| Publisher DOI: | 10.3390/geosciences9010007 |
| Abstract: | Hydrodynamic zones of river confluences are remarkable not only for the turbulent mixing induced by the shear layer at the center of the mixing interface but also for the lateral momentum fluxes associated with channel topography. Detailed characterizations of lateral momentum transfers in river confluences, however, are few. In this study, contributions to the lateral momentum fluxes in the confluence of the Negro and Solimoes rivers in Brazil were calculated based on a comprehensive set of field data. Results show that the lateral fluxes by the mean flow exceed the turbulent fluxes by two orders of magnitude. Furthermore, the Reynolds stress along the far field of the Solimoes side of the Amazon channel scales with or surpasses the Reynolds stress at the interface with the Negro side. The importance of the shear layer in the lateral mixing is thus overshadowed by the competing hydrodynamic processes. This configuration partially explains the long distance required to complete the mixing of the waters of the two tributary rivers. |
| Rights: | © 2019 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/2115/73631 |
| 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: Adriano Coutinho De Lima
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