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Roughness Coefficient of Micro-irrigation Laterals


Mohd Soom, Mohd Amin (1994) Roughness Coefficient of Micro-irrigation Laterals. Pertanika Journal of Science & Technology, 2 (1). pp. 93-105. ISSN 0128-7680


A micro-irrigation system' must apply water and fertilizer uniformly over the entire field. However friction loss in pipes and fittings, and differences in elevation cause water pressure to vary. Discharge variations due to pressure differences and manufacturing variations cause non-uniformity of irrigation. To assure maximum economy, the hydraulic design of the system must be adequately evaluated for the required level of uniformity. This paper presents results of laboratory tests for head loss in smooth polyethylene pipe fitted with insert emitters. The Hazen-Williams roughness coefficients are included in the friction factor-Reynolds number diagrams so that system designers may choose a more accurate friction coefficient to improve energy, water and material use efficiency of a micro-irrigation system.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
Publisher: Universiti Putra Malaysia Press
Keywords: micro/trickle/drip irrigation, pipe flow hydraulics, lateral design, friction factor, roughness coefficient, head loss, emitter barb protrusion
Depositing User: Nur Izzati Mohd Zaki
Date Deposited: 24 Nov 2009 03:38
Last Modified: 27 May 2013 07:06
URI: http://psasir.upm.edu.my/id/eprint/3154
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