Research Article
Jun 1973
Hydraulics and Uniformity for Drip Irrigation
Authors: I-pai Wu, M.ASCE, and Harris M. GitlinAuthor Affiliations
Publication: Journal of the Irrigation and Drainage Division
Volume 99, Issue 2
Abstract
A drip irrigation system consists of a main line, submains, and laterals and emitters. The flow condition in the submain and laterals is steady, spatially varied with laterals outflows; the discharge is decreasing with respect to the length of the line. By considering them as smooth pipes, Blasins equation for friction coefficient is used to determine energy drop between outlets along a drip irrigation line. The energy gradient line is not a straight line but a curve of exponential type which can be determined by calculating energy drop of all sections along the line. A simple way of estimating energy gradient line with only about 1% of error can be done by dividing the line into three or four segments and using the average discharge for each segment to calculate energy drops along the line. The pressure distribution along the line can be determined for both level and sloping surfaces. Uniform water application along a drip irrigation line can be achieved by using different size of emitters, length or size microtube, and spacing between emitters.
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Information
Published In
Journal of the Irrigation and Drainage Division
Volume 99 • Issue 2 • June 1973
Pages: 157 - 168
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: Jun 1973
Published online: Feb 11, 2021
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Authors
Affiliations
I-pai Wu, M.ASCE
Assoc. Prof. of Agri. Engrg., Univ. of Hawaii, Honolulu, Hawaii
Harris M. Gitlin
Assoc. Extension Specialist in Agri. Engrg., Univ. of Hawaii, Honolulu, Hawaii
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
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