Variations in roughness predictions (flume experiments)

Daniëlle Noordam; Astrid Blom; H. van der Klis; Suzanne J.M.H. Hulscher

Variations in roughness predictions (flume experiments)

Daniëlle Noordam, Astrid Blom, H. van der Klis, Suzanne J.M.H. Hulscher

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

Data of flume experiments with bed forms are used to analyze and compare different roughness predictors. In this study, the hydraulic roughness consists of grain roughness and form roughness. We predict the grain roughness by means of the size of the sediment. The form roughness is predicted by three approaches: Van Rijn (1984), Vanoni & Hwang (1967) and Engelund (1966). The total roughness values (friction factors) are compared with the roughness values according to the DarcyWeisbach equation. Results show that the different methods predict different friction factors. In future research uncertainties in the hydraulic roughness will be taken into account to determine their influence on the computed water levels.

Original language	Undefined
Title of host publication	Proceedings NCR-days 2004, Research for managing rivers; present and future issues
Editors	A. Makaske, H.P. Wolfert, A.G. van Os
Pages	104-105
Publication status	Published - 4 Nov 2005
Event	NCR-days 2004: NCR-day 2004. Research for managing rivers; present and future issues - Wageningen, The Netherlands, Wageningen Duration: 4 Nov 2004 → 5 Nov 2004

Publication series

Name	NCR publication
Number	1568-234X
Volume	26-2005

Conference

Conference	NCR-days 2004
City	Wageningen
Period	4/11/04 → 5/11/04
Other	November 4 – 6, 2004

Keywords

METIS-224916
IR-52923

Access to Document

Noordam04variations

Cite this

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title = "Variations in roughness predictions (flume experiments)",

abstract = "Data of flume experiments with bed forms are used to analyze and compare different roughness predictors. In this study, the hydraulic roughness consists of grain roughness and form roughness. We predict the grain roughness by means of the size of the sediment. The form roughness is predicted by three approaches: Van Rijn (1984), Vanoni & Hwang (1967) and Engelund (1966). The total roughness values (friction factors) are compared with the roughness values according to the DarcyWeisbach equation. Results show that the different methods predict different friction factors. In future research uncertainties in the hydraulic roughness will be taken into account to determine their influence on the computed water levels.",

keywords = "METIS-224916, IR-52923",

author = "Dani{\"e}lle Noordam and Astrid Blom and {van der Klis}, H. and Hulscher, {Suzanne J.M.H.}",

note = "NCR publication 26-2005 ; NCR-days 2004 ; Conference date: 04-11-2004 Through 05-11-2004",

year = "2005",

month = nov,

day = "4",

language = "Undefined",

series = "NCR publication",

number = "1568-234X",

pages = "104--105",

editor = "A. Makaske and H.P. Wolfert and {van Os}, A.G.",

booktitle = "Proceedings NCR-days 2004, Research for managing rivers; present and future issues",

}

Variations in roughness predictions (flume experiments). / Noordam, Daniëlle; Blom, Astrid; van der Klis, H. et al.
Proceedings NCR-days 2004, Research for managing rivers; present and future issues. ed. / A. Makaske; H.P. Wolfert; A.G. van Os. 2005. p. 104-105 (NCR publication; Vol. 26-2005, No. 1568-234X).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Variations in roughness predictions (flume experiments)

AU - Noordam, Daniëlle

AU - Blom, Astrid

AU - van der Klis, H.

AU - Hulscher, Suzanne J.M.H.

N1 - NCR publication 26-2005

PY - 2005/11/4

Y1 - 2005/11/4

N2 - Data of flume experiments with bed forms are used to analyze and compare different roughness predictors. In this study, the hydraulic roughness consists of grain roughness and form roughness. We predict the grain roughness by means of the size of the sediment. The form roughness is predicted by three approaches: Van Rijn (1984), Vanoni & Hwang (1967) and Engelund (1966). The total roughness values (friction factors) are compared with the roughness values according to the DarcyWeisbach equation. Results show that the different methods predict different friction factors. In future research uncertainties in the hydraulic roughness will be taken into account to determine their influence on the computed water levels.

AB - Data of flume experiments with bed forms are used to analyze and compare different roughness predictors. In this study, the hydraulic roughness consists of grain roughness and form roughness. We predict the grain roughness by means of the size of the sediment. The form roughness is predicted by three approaches: Van Rijn (1984), Vanoni & Hwang (1967) and Engelund (1966). The total roughness values (friction factors) are compared with the roughness values according to the DarcyWeisbach equation. Results show that the different methods predict different friction factors. In future research uncertainties in the hydraulic roughness will be taken into account to determine their influence on the computed water levels.

KW - METIS-224916

KW - IR-52923

M3 - Conference contribution

T3 - NCR publication

SP - 104

EP - 105

BT - Proceedings NCR-days 2004, Research for managing rivers; present and future issues

A2 - Makaske, A.

A2 - Wolfert, H.P.

A2 - van Os, A.G.

T2 - NCR-days 2004

Y2 - 4 November 2004 through 5 November 2004

ER -