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Influence of bed roughness in open channel

Md Ali, Zarina and Saib, Nor Ashikin (2011) Influence of bed roughness in open channel. In: International Seminar on Application of Science Matehmatics 2011, 1 - 3 November 2011, Putra World Trade Centre, KL, Malaysia.


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Roughness elements are essential parts of natural ecological system for most environmental standpoint. The variation of roughness coefficient, n values occur may be caused by channel properties, flow rate and others. The purpose of this study is to determine the affects of gravel bed to roughness characteristics in channel. An experimental works were carried out by using flu mes (10m x 0.3m x 0.46m) with gravel and smooth bed surface. The impact of both conditions on the rate of flow and roughness was determined with different set of slopes and flow rates. The roughness coefficient n obtained by flume gravel bed surface is bigger than flu me with smooth bed surface. The differences of flowrate, Qtheory and Qexperiment ranged of 17 to 25%. As conclusion, flow rate and roughness coefficient were influenced by bed roughness and slope; and categorized in subcritical flow condition

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Open channel flow; roughness; channel bed; gravel bed
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
Depositing User: M.Iqbal Zainal A
Date Deposited: 20 Feb 2012 04:20
Last Modified: 20 Feb 2012 06:41
URI: http://eprints.uthm.edu.my/id/eprint/2366
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