Protective spur dike for scour mitigation of existing spur dikes / Hojat Karamia in Journal of hydraulic research, Vol. 49 N° 6 (Novembre/Décembre 2011)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 809-813 Titre : Protective spur dike for scour mitigation of existing spur dikes Type de document : texte imprimé Auteurs : Hojat Karamia, Auteur ; Abdollah Ardeshir, Auteur ; Kourosh Behzadian, Auteur Année de publication : 2012 Article en page(s) : pp. 809-813 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Experimentation Flow pattern Open channel Protective spur dike Scour countermeasure 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 : To alleviate the scour depth around a series of existing spur dikes (SDs), a protective SD located upstream of the first was experimentally investigated. To determine the optimal design parameters, various values, lengths, angles and the spacing of a protective SDs were experimentally tested under different clear-water conditions in a straight river reach and a fixed flow depth. To investigate the behaviour of the flow field around the SDs, acoustic Doppler velocimeter was used to measure instantaneous velocity components on a rough rigid bed. The results indicate that a properly designed protective SD is able to decrease the average of the maximum scour depth around the main SDs. The optimum design parameters of a protective SD are recommended for each length for a particular experiment. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.625166 [article] Protective spur dike for scour mitigation of existing spur dikes [texte imprimé] / Hojat Karamia, Auteur ; Abdollah Ardeshir, Auteur ; Kourosh Behzadian, Auteur . - 2012 . - pp. 809-813. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 49 N° 6 (Novembre/Décembre 2011) . - pp. 809-813 Mots-clés : Experimentation Flow pattern Open channel Protective spur dike Scour countermeasure 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 : To alleviate the scour depth around a series of existing spur dikes (SDs), a protective SD located upstream of the first was experimentally investigated. To determine the optimal design parameters, various values, lengths, angles and the spacing of a protective SDs were experimentally tested under different clear-water conditions in a straight river reach and a fixed flow depth. To investigate the behaviour of the flow field around the SDs, acoustic Doppler velocimeter was used to measure instantaneous velocity components on a rough rigid bed. The results indicate that a properly designed protective SD is able to decrease the average of the maximum scour depth around the main SDs. The optimum design parameters of a protective SD are recommended for each length for a particular experiment. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.625166

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