Influence of different roughness of bed and side walls in an open channel

Coefficients of roughness, n are characterized as parameters representing the channel roughness and flow resistance. The Manning equation has been recognized as the most proper formulae to represent the open channel flow application. This study is about determining the mean roughness coefficients fo...

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Main Author:	Siti Natasha, Shamshul Bahri
Format:	Undergraduates Project Papers
Language:	English
Published:	2014
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/11582/ http://umpir.ump.edu.my/id/eprint/11582/ http://umpir.ump.edu.my/id/eprint/11582/1/SITI%20NATASHA%20BINTI%20SHAMSHUL%20BAHRI.PDF

id	ump-11582
recordtype	eprints
spelling	ump-115822015-12-14T02:36:55Z http://umpir.ump.edu.my/id/eprint/11582/ Influence of different roughness of bed and side walls in an open channel Siti Natasha, Shamshul Bahri TA Engineering (General). Civil engineering (General) Coefficients of roughness, n are characterized as parameters representing the channel roughness and flow resistance. The Manning equation has been recognized as the most proper formulae to represent the open channel flow application. This study is about determining the mean roughness coefficients for an open channel with different bed and side walls roughness. The experiments were conducted at the Hydraulic and Hydrology Laboratory in Universiti Malaysia Pahang. The experiments were performed on a rectangular open channel with glass sides and a flat bed. The size of the rectangular open channel was lOm long, 0.3 m wide and 0.46m deep. The experiments were carried out using two different types of roughness; 5mm gravel and 2 mm gravel. There were two channel conditions, bed and sidewalls having the same roughness, and only the channel bed had the roughness while the sidewalls were smooth. For both conditions; experiments were conducted with certain three fixed slope gradients which are 1:100, 1:300, and 1:500. The fixed flow rates, 4m 31s, 8 m 3/s and 12 m 31 were also set by adjusting the water pump. The data obtained was converted into graph form before performing the analysis. The heights and velocities were recorded at the upper stream and lower stream of the open channel under different roughness conditions. The results showed that the coefficient of roughness for the open channel with wall roughness is higher than the channel without sidewall roughness and larger grain size will give higher roughness coefficient. It also can be concluded that channel slope and surface roughness were the main factors in determining the roughness coefficient. 2014-06 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/11582/1/SITI%20NATASHA%20BINTI%20SHAMSHUL%20BAHRI.PDF Siti Natasha, Shamshul Bahri (2014) Influence of different roughness of bed and side walls in an open channel. Faculty of Civil Engineering and Earth Resources, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:85079&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Siti Natasha, Shamshul Bahri Influence of different roughness of bed and side walls in an open channel
description	Coefficients of roughness, n are characterized as parameters representing the channel roughness and flow resistance. The Manning equation has been recognized as the most proper formulae to represent the open channel flow application. This study is about determining the mean roughness coefficients for an open channel with different bed and side walls roughness. The experiments were conducted at the Hydraulic and Hydrology Laboratory in Universiti Malaysia Pahang. The experiments were performed on a rectangular open channel with glass sides and a flat bed. The size of the rectangular open channel was lOm long, 0.3 m wide and 0.46m deep. The experiments were carried out using two different types of roughness; 5mm gravel and 2 mm gravel. There were two channel conditions, bed and sidewalls having the same roughness, and only the channel bed had the roughness while the sidewalls were smooth. For both conditions; experiments were conducted with certain three fixed slope gradients which are 1:100, 1:300, and 1:500. The fixed flow rates, 4m 31s, 8 m 3/s and 12 m 31 were also set by adjusting the water pump. The data obtained was converted into graph form before performing the analysis. The heights and velocities were recorded at the upper stream and lower stream of the open channel under different roughness conditions. The results showed that the coefficient of roughness for the open channel with wall roughness is higher than the channel without sidewall roughness and larger grain size will give higher roughness coefficient. It also can be concluded that channel slope and surface roughness were the main factors in determining the roughness coefficient.
format	Undergraduates Project Papers
author	Siti Natasha, Shamshul Bahri
author_facet	Siti Natasha, Shamshul Bahri
author_sort	Siti Natasha, Shamshul Bahri
title	Influence of different roughness of bed and side walls in an open channel
title_short	Influence of different roughness of bed and side walls in an open channel
title_full	Influence of different roughness of bed and side walls in an open channel
title_fullStr	Influence of different roughness of bed and side walls in an open channel
title_full_unstemmed	Influence of different roughness of bed and side walls in an open channel
title_sort	influence of different roughness of bed and side walls in an open channel
publishDate	2014
url	http://umpir.ump.edu.my/id/eprint/11582/ http://umpir.ump.edu.my/id/eprint/11582/ http://umpir.ump.edu.my/id/eprint/11582/1/SITI%20NATASHA%20BINTI%20SHAMSHUL%20BAHRI.PDF
first_indexed	2023-09-18T22:12:29Z
last_indexed	2023-09-18T22:12:29Z
_version_	1777415120101572608

Influence of different roughness of bed and side walls in an open channel

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