| Titre : | Local scour at a trapezoidal abutment: sediment motion pattern (2009) |
| Titre original : | Affouillement local au droit d'une butée trapézoïdale: comportement du sédiment |
| Auteurs : | Alessio Radice, Auteur ; Francesco Ballio, Auteur ; Giovanni Porta, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of hydraulic research (Vol. 47 N° 2+ Supplément, Mars/Avril 2009) |
| Article en page(s) : | pp. 250-262 |
| Note générale : |
Hydraulique
Résumé en Français |
| Langues : | Anglais |
| Index. décimale : | 627 (Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques) |
| Tags : | Laboratory model Local scour Scour development Sediment concentration velocity Solid discharge Trapezoidal abutment Vortical structures |
| Résumé : |
Results for a local scour experiment are presented where the sediment motion was measured around a trapezoidal abutment. The experiment was performed in clear-water conditions. The sediment fluxes were evaluated by measuring the concentration and the velocity of the moving particles. Various evolution stages were considered, from the start of the experiment to a scour depth of almost twice the abutment length, with particular focus on the temporal and spatial evolution of the sediment kinematics. The results are then compared systematically with literature studies on the vertical flow field around trapezoidal abutments, to verify the consistency between the observed liquid and solid phase motion fields in a local scour process. The findings may support phenomenological analysis of the erosion process and numerical modeling of the temporal development of the scour depth at a trapezoidal abutment.
|
| DEWEY : | 627 |
| ISSN : | 0022-1686 |
| En ligne : | http://www.journalhydraulicresearch.com |
