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Fall velocities of natural sediment particles: a simple mathematical presentation of the fall velocity / K. She in Journal of hydraulic research, Vol. 46 extra issue (2008) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 46 extra issue (2008) . - p. 168-174 Titre : Fall velocities of natural sediment particles: a simple mathematical presentation of the fall velocity Type de document : texte imprimé Auteurs : K. She, Auteur ; L. Trim, Auteur ; D. Pope, Auteur Article en page(s) : p. 168-174 Note générale : Hydraulique Discussion Langues : Anglais (eng) Mots-clés : Fall  velocities  Sediment  particles 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 fall velocity of coastal or river sediment is usually calculated by literature formulas. Many authors have highlighted that this procedure is not really suitable for evaluating the average fall velocity of the natural sediment as a whole. A direct measurement of the sediment samples is recommended. A large number of tests with different sands setting tube diameters, fallings heights and sand concentration have been investigated. Suggestions for a correct use of the settlings tube are made. Measurements on 23 sands (three of them shingles), improved the Eq. (3) proposed by She et al. (2005), showwing that it could be a promising formula to calculate the average fall velocity of natural sands. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Fall velocities of natural sediment particles: a simple mathematical presentation of the fall velocity [texte imprimé] / K. She, Auteur ; L. Trim, Auteur ; D. Pope, Auteur . - p. 168-174. Hydraulique Discussion Langues : Anglais (eng) in Journal of hydraulic research > Vol. 46 extra issue (2008) . - p. 168-174 Mots-clés : Fall  velocities  Sediment  particles 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 fall velocity of coastal or river sediment is usually calculated by literature formulas. Many authors have highlighted that this procedure is not really suitable for evaluating the average fall velocity of the natural sediment as a whole. A direct measurement of the sediment samples is recommended. A large number of tests with different sands setting tube diameters, fallings heights and sand concentration have been investigated. Suggestions for a correct use of the settlings tube are made. Measurements on 23 sands (three of them shingles), improved the Eq. (3) proposed by She et al. (2005), showwing that it could be a promising formula to calculate the average fall velocity of natural sands. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com