Equivalent roughness height for plane bed under steady flow
(2006) In Journal of Hydraulic Engineering 132(11). p.1146-1158- Abstract
- This paper presents a new relationship between the roughness height and the main hydrodynamic and sediment parameters for plane beds under steady current conditions. In order to derive such a formula, a large data base involving plane-bed experiments was compiled from previous investigations and analyzed. Comparisons between the data and different existing predictive formulas for the bed roughness obtained from the literature were also made. A relationship with the Shields parameter only, which is commonly proposed, appeared to be insufficient. The roughness was also found to be a function of a Froude number and a dimensionless settling velocity. A critical Shields parameter was identified up to which the equivalent roughness ratio is... (More)
- This paper presents a new relationship between the roughness height and the main hydrodynamic and sediment parameters for plane beds under steady current conditions. In order to derive such a formula, a large data base involving plane-bed experiments was compiled from previous investigations and analyzed. Comparisons between the data and different existing predictive formulas for the bed roughness obtained from the literature were also made. A relationship with the Shields parameter only, which is commonly proposed, appeared to be insufficient. The roughness was also found to be a function of a Froude number and a dimensionless settling velocity. A critical Shields parameter was identified up to which the equivalent roughness ratio is proportional to the Shields parameter. The new empirical equation that was developed yields the best results for all conditions investigated, and should improve the understanding of the total shear stress. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/378811
- author
- Camenen, Benoit LU ; Bayram, Atilla and Larson, Magnus LU
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- steady flow, experimental data, sheet flow, roughness, shear stress
- in
- Journal of Hydraulic Engineering
- volume
- 132
- issue
- 11
- pages
- 1146 - 1158
- publisher
- American Society of Civil Engineers (ASCE)
- external identifiers
-
- wos:000241572400004
- scopus:33750112581
- ISSN
- 1943-7900
- DOI
- 10.1061/(ASCE)0733-9429(2006)132:11(1146)
- language
- English
- LU publication?
- yes
- id
- 51ca8e93-285f-4d7f-b935-bf673c603d41 (old id 378811)
- date added to LUP
- 2016-04-01 16:19:55
- date last changed
- 2022-04-22 21:19:30
@article{51ca8e93-285f-4d7f-b935-bf673c603d41,
abstract = {{This paper presents a new relationship between the roughness height and the main hydrodynamic and sediment parameters for plane beds under steady current conditions. In order to derive such a formula, a large data base involving plane-bed experiments was compiled from previous investigations and analyzed. Comparisons between the data and different existing predictive formulas for the bed roughness obtained from the literature were also made. A relationship with the Shields parameter only, which is commonly proposed, appeared to be insufficient. The roughness was also found to be a function of a Froude number and a dimensionless settling velocity. A critical Shields parameter was identified up to which the equivalent roughness ratio is proportional to the Shields parameter. The new empirical equation that was developed yields the best results for all conditions investigated, and should improve the understanding of the total shear stress.}},
author = {{Camenen, Benoit and Bayram, Atilla and Larson, Magnus}},
issn = {{1943-7900}},
keywords = {{steady flow; experimental data; sheet flow; roughness; shear stress}},
language = {{eng}},
number = {{11}},
pages = {{1146--1158}},
publisher = {{American Society of Civil Engineers (ASCE)}},
series = {{Journal of Hydraulic Engineering}},
title = {{Equivalent roughness height for plane bed under steady flow}},
url = {{http://dx.doi.org/10.1061/(ASCE)0733-9429(2006)132:11(1146)}},
doi = {{10.1061/(ASCE)0733-9429(2006)132:11(1146)}},
volume = {{132}},
year = {{2006}},
}