Persistent Link:
http://hdl.handle.net/10150/191845
Title:
Canal side weirs for water delivery to irrigation furrows
Author:
Eftekharzadeh, Shahriar.
Issue Date:
1985
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The canal side weir system is a relatively new method for water distribution to irrigation furrows. The system consists of a concrete lined ditch (canal), equipped with small openings or weirs which deliver the design irrigation flow rate into individual furrows. This research aims at evaluating the proformance characteristics of this system through laboratory, field, and computer studies. A laboratory model was used to establish head discharge relationships for various weirs at different channel velocities. For sharp entranced weirs, discharge for a given head was found to be inverselly proportional to the magnitude of the channel velocity. At small heads (20-30 mm), discharge at 0.3 m/s velocity was found to be about 15% less than the corresponding discharge at zero channel velocity . For normal irrigation settings (head on the weir = 60-80 mm), the difference was about 6%. Streamline entranced weirs were found to have negligible sensitivity to changes in the channel velocity. Field evaluation studies revealed better overall proformance than conventional systems. For an operating system, an application efficiency of 86% with uniformity coefficient of 0.84 at 7% deficit was calculated. The components of loss were run-off 4% and deep percolation 10%.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Irrigation canals and flumes -- Linings.; Irrigation engineering.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Soils, Water and Engineering; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Fangmeier, Delmar D.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleCanal side weirs for water delivery to irrigation furrowsen_US
dc.creatorEftekharzadeh, Shahriar.en_US
dc.contributor.authorEftekharzadeh, Shahriar.en_US
dc.date.issued1985en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe canal side weir system is a relatively new method for water distribution to irrigation furrows. The system consists of a concrete lined ditch (canal), equipped with small openings or weirs which deliver the design irrigation flow rate into individual furrows. This research aims at evaluating the proformance characteristics of this system through laboratory, field, and computer studies. A laboratory model was used to establish head discharge relationships for various weirs at different channel velocities. For sharp entranced weirs, discharge for a given head was found to be inverselly proportional to the magnitude of the channel velocity. At small heads (20-30 mm), discharge at 0.3 m/s velocity was found to be about 15% less than the corresponding discharge at zero channel velocity . For normal irrigation settings (head on the weir = 60-80 mm), the difference was about 6%. Streamline entranced weirs were found to have negligible sensitivity to changes in the channel velocity. Field evaluation studies revealed better overall proformance than conventional systems. For an operating system, an application efficiency of 86% with uniformity coefficient of 0.84 at 7% deficit was calculated. The components of loss were run-off 4% and deep percolation 10%.en_US
dc.description.notehydrology collectionen_US
dc.description.notep. 36 and p. 37 are missing from both paper original and microfilm version.-
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshIrrigation canals and flumes -- Linings.en_US
dc.subject.lcshIrrigation engineering.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineSoils, Water and Engineeringen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairFangmeier, Delmar D.en_US
dc.identifier.oclc213390815en_US
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