Data/hora: 05/06/2024 17:32:12

Provedor de dados: 	Institutional Archive of Ifreme (ArchiMer)	
País: 	France	
Título: 	Accounting for Rough Bed Friction Factors of Mud Beds as a Result of Biological Activity in Erosion Experiments	
Autores: 	Guizien, Katell; Orvain, Francis; Duchene, Jean-claude; Le Hir, Pierre.	
Data: 	2012-11	
Ano: 	2012	
Palavras-chave: 	Bed roughness; Friction factor; Mud beds; Biological activity; Erosion experiments.	
Resumo: 	The average bed shear stress and bed friction factor of samples with any roughness was derived from the head loss between upstream and downstream of a test section in an erosion tunnel. The method was validated in both hydraulically smooth (plexiglass; Reynolds number less than 25,000) and rough regimes (calibrated particles with known roughness). As a first step toward using this method on natural sediment, this method was tested with experimental mesocosms assembled from field collected materials (sieved sediments; diatoms). Bed shear stress measurement precision was high enough in the experiments to detect a positive significant relationship between bed friction factor and core roughness. The observed bed friction factor increase could be related to diatom growth but not to diatoms biomass. DOI: 10.1061/(ASCE)HY.1943-7900.0000627. (C) 2012 American Society of Civil Engineers.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/00117/22807/20617.pdf

DOI:10.1061/(ASCE)HY.1943-7900.0000627	
Editor: 	Asce-amer Soc Civil Engineers	
Relação: 	http://archimer.ifremer.fr/doc/00117/22807/	
Formato: 	application/pdf	
Fonte: 	Journal Of Hydraulic Engineering-asce (0733-9429) (Asce-amer Soc Civil Engineers), 2012-11 , Vol. 138 , N. 11 , P. 979-984	
Fonte: 	2012 American Society of Civil Engineers.