Mitigation of sedimentation problems in the lower reach of the River Klaralven / Bijan Darhahi in Journal of hydraulic research, Vol. 46 N°2 (2008)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 46 N°2 (2008) . - p. 224-236 Titre : Mitigation of sedimentation problems in the lower reach of the River Klaralven Titre original : Réduction des problèmes de sédimentation dans l'extension inférieure du fleuve Mitigation of sedimentation problems in the lower reach of the River Klaralven Type de document : texte imprimé Auteurs : Bijan Darhahi, Auteur Article en page(s) : p. 224-236 Note générale : Hydraulique Résumé en Français Langues : Anglais (eng) Mots-clés : Groynes River training Sedimentation Two-dimensional models Vanes 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 Résumé : The study focuses on the sedimentation problems found in the lower reach of the River Klarälven, where the river bifurcates into a west and an east channels at the city of Karlstad. During a period of thirty years, the sediment transport capacity of the west-channel has gradually diminished. This has caused a growing concern about the risk of flooding in the city. The study has aimed to find relevant methods for both increasing the hydraulic capacity of the west river channel, and mitigation of sedimentation problems.The main approach was numerical flow and sediment transport modelling. A two-dimensional depth-averaged modelwas used to study the influence of various river training measures. The modelwas found effective to address the sedimentation problem and the reduced hydraulic capacity in the river. To mitigate these problems, two effective engineering methods were controlling the water levels by partial gates and the use of groynes or vanes. The results suggested that a carefully calibrated and verified 2-D depth-averaged model can be used in supporting river restoration works and flood alleviation schemes. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Mitigation of sedimentation problems in the lower reach of the River Klaralven = Réduction des problèmes de sédimentation dans l'extension inférieure du fleuve Mitigation of sedimentation problems in the lower reach of the River Klaralven [texte imprimé] / Bijan Darhahi, Auteur . - p. 224-236. Hydraulique Résumé en Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 46 N°2 (2008) . - p. 224-236 Mots-clés : Groynes River training Sedimentation Two-dimensional models Vanes 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 Résumé : The study focuses on the sedimentation problems found in the lower reach of the River Klarälven, where the river bifurcates into a west and an east channels at the city of Karlstad. During a period of thirty years, the sediment transport capacity of the west-channel has gradually diminished. This has caused a growing concern about the risk of flooding in the city. The study has aimed to find relevant methods for both increasing the hydraulic capacity of the west river channel, and mitigation of sedimentation problems.The main approach was numerical flow and sediment transport modelling. A two-dimensional depth-averaged modelwas used to study the influence of various river training measures. The modelwas found effective to address the sedimentation problem and the reduced hydraulic capacity in the river. To mitigate these problems, two effective engineering methods were controlling the water levels by partial gates and the use of groynes or vanes. The results suggested that a carefully calibrated and verified 2-D depth-averaged model can be used in supporting river restoration works and flood alleviation schemes. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

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