Morphology and flow structures in a large confluence-diffluence: Rio Paraná, Argentina

O. Orfeo, D. R. Parsons, J. L. Best, S. N. Lane, R. J. Hardy, R. Kostaschuk, R. N. Szupiany, M. L. Amsler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Confluence-diffluence units are key elements within many river systems and present a complex and linked pattern of flow and sediment transport between these two nodes. Past work has seen much progress in our modelling ofriver confluences, and increasing attention is being paid to bifurcations and the important role of bifurcation asymmetry. However, most of these studies have been conducted in laboratory flumes or within small rivers (depths less than 3 m and widths < 100 m). This paper presents a study of the bed morphology and 3D flow within a very large confluence-diffluence unit in the Rio Paraná, Argentina. The paper details the central scour within the reach and reveals that the flow within the confluence-diffluence is dominated largely by the bed roughness, and that the coherent secondary flow cells, that have been identified in smaller channels and assumed to be present within large rivers, are generally absent in this reach.

Original languageEnglish (US)
Title of host publicationProceedings of the International Conference on Fluvial Hydraulics - River Flow 2006
Pages1277-1282
Number of pages6
StatePublished - Dec 1 2006
Externally publishedYes
EventInternational Conference on Fluvial Hydraulics - River Flow 2006 - Lisbon, Portugal
Duration: Sep 6 2006Sep 8 2006

Publication series

NameProceedings of the International Conference on Fluvial Hydraulics - River Flow 2006
Volume2

Other

OtherInternational Conference on Fluvial Hydraulics - River Flow 2006
CountryPortugal
CityLisbon
Period9/6/069/8/06

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ASJC Scopus subject areas

  • Water Science and Technology

Cite this

Orfeo, O., Parsons, D. R., Best, J. L., Lane, S. N., Hardy, R. J., Kostaschuk, R., Szupiany, R. N., & Amsler, M. L. (2006). Morphology and flow structures in a large confluence-diffluence: Rio Paraná, Argentina. In Proceedings of the International Conference on Fluvial Hydraulics - River Flow 2006 (pp. 1277-1282). (Proceedings of the International Conference on Fluvial Hydraulics - River Flow 2006; Vol. 2).