Data/hora: 11/06/2024 06:57:08

Provedor de dados: | 5
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.