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Effect of selected parameters on the depositional behaviour of turbidity currents / Ehsan Khavasi in Journal of hydraulic research, Vol. 50 N° 1 (Janvier/Février 2012) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 50 N° 1 (Janvier/Février 2012) . - pp. 60-69 Titre : Effect of selected parameters on the depositional behaviour of turbidity currents Type de document : texte imprimé Auteurs : Ehsan Khavasi, Auteur ; Hossein Afshin, Auteur ; Bahar Firoozabadi, Auteur Année de publication : 2012 Article en page(s) : pp. 60-69 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Deposition  Inlet  Froude  number  Suspended  sediment  flux  Turbidity  current Résumé : Turbidity currents containing kaolin particles were studied experimentally in a channel and the velocity and concentration profiles were measured using an acoustic Doppler velocimeter. These experiments were performed to investigate the depositional behaviour of turbidity currents. The suspended sediment flux was evaluated by experimental and analytical methods and the results of these two methods were in a good agreement. To evaluate the suspended sediment flux, it was necessary to recognize the suspended sediment zone from the upper shear layer region and near the bed depositional area as well. The method of determination of these areas is discussed. The effects of important parameters including the inlet Froude number and bed slope were also studied. Based on these results, it can be concluded that the non-dimensional sediment flux decreases at the vicinity of the hydraulic jump with the inlet Froude number, whereas an increase in the bed slope reduces the non-dimensional sediment flux. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.641763 [article] Effect of selected parameters on the depositional behaviour of turbidity currents [texte imprimé] / Ehsan Khavasi, Auteur ; Hossein Afshin, Auteur ; Bahar Firoozabadi, Auteur . - 2012 . - pp. 60-69. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 50 N° 1 (Janvier/Février 2012) . - pp. 60-69 Mots-clés : Deposition  Inlet  Froude  number  Suspended  sediment  flux  Turbidity  current Résumé : Turbidity currents containing kaolin particles were studied experimentally in a channel and the velocity and concentration profiles were measured using an acoustic Doppler velocimeter. These experiments were performed to investigate the depositional behaviour of turbidity currents. The suspended sediment flux was evaluated by experimental and analytical methods and the results of these two methods were in a good agreement. To evaluate the suspended sediment flux, it was necessary to recognize the suspended sediment zone from the upper shear layer region and near the bed depositional area as well. The method of determination of these areas is discussed. The effects of important parameters including the inlet Froude number and bed slope were also studied. Based on these results, it can be concluded that the non-dimensional sediment flux decreases at the vicinity of the hydraulic jump with the inlet Froude number, whereas an increase in the bed slope reduces the non-dimensional sediment flux. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.641763