| Titre : | Improved 1-D modelling in compound meandering channels with vegetated floodplains |
| Titre original : | Modélisation unidimensionnelle améliorée des cours d'eau à méandres avec des plaines d'inondation couvertes de végétation |
| Auteurs : | Martin-Vide, J. P., Auteur ; P. J. M. Moreta, Auteur ; S. Lopez-Querol, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of hydraulic research (Vol. 46 N°2, 2008) |
| Article en page(s) : | p. 265-276 |
| Note générale : |
Hydraulique
Résumé en Français |
| Langues : | Anglais |
| Tags : | Compound channel Foodplain Meanders Vegetation 1D-modelling |
| Résumé : |
This paper shows that common open channel flow one-dimensional (1-D) numerical models behave poorly in terms of flow distribution across a section in a naturalized meandering channel with vegetated floodplains. We compared numerical models with new experiments carried out in a physical model on a reach of the Besòs river close to Barcelona that has been restored. The case examined has floodplains with thick vegetation, a low-flow meandering channel and high water depths over the main channel and floodplains. 1-D models overestimate velocities in the main channel but underestimate them on the floodplains. The paper gives a detailed description of an improved 1-D computation method based on the consideration of the total shear stress at the main channel-floodplain interface (the sum of turbulent friction plus lateral momentum transfer) on the one hand, and the influence of upstream velocity distribution with the help of two-dimensional numerical models on the other hand.
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| DEWEY : | 627 |
| ISSN : | 0022-1686 |
| En ligne : | http://www.journalhydraulicresearch.com |
