Show simple item record

dc.contributor.advisorScherer, Thomas F.en_US
dc.contributor.authorWaheed, Syed Imran, 1962-
dc.creatorWaheed, Syed Imran, 1962-en_US
dc.date.accessioned2013-05-16T09:23:24Z
dc.date.available2013-05-16T09:23:24Z
dc.date.issued1990en_US
dc.identifier.urihttp://hdl.handle.net/10150/291398
dc.description.abstractAnalysis indicates that the Blasius equation yields accurate estimates of head loss in small diameter plastic tubing and larger diameter PVC pipe for Reynolds numbers upto 100,000. The Hazen-Williams equation with suitable roughness parameter values also predicts head loss accurately. The results of laboratory experiments reveal that the undulations which are created during field installation are the primary cause of air locking in the delivery hose. The additional head needed to release the trapped air was found to be equal to the sum of heights of all the undulations. If the sum of their heights exceeds the design head loss in the delivery hose, air locking will result. The capital investment for bubbler system under study was comparable to that of a pressurized drip system. Long term savings in terms of energy and maintenance make low head bubbler systems an attractive alternative to pressurized drip systems for irrigating orchards or vineyards.
dc.language.isoen_USen_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.subjectEngineering, Agricultural.en_US
dc.subjectEngineering, Civil.en_US
dc.subjectEngineering, Mechanical.en_US
dc.titleDesign criteria for low head bubbler irrigation systemsen_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
dc.identifier.proquest1342993en_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineAgricultural & Biosystems Engineeringen_US
thesis.degree.nameM.S.en_US
dc.identifier.bibrecord.b26623961en_US
refterms.dateFOA2018-05-27T17:31:37Z
html.description.abstractAnalysis indicates that the Blasius equation yields accurate estimates of head loss in small diameter plastic tubing and larger diameter PVC pipe for Reynolds numbers upto 100,000. The Hazen-Williams equation with suitable roughness parameter values also predicts head loss accurately. The results of laboratory experiments reveal that the undulations which are created during field installation are the primary cause of air locking in the delivery hose. The additional head needed to release the trapped air was found to be equal to the sum of heights of all the undulations. If the sum of their heights exceeds the design head loss in the delivery hose, air locking will result. The capital investment for bubbler system under study was comparable to that of a pressurized drip system. Long term savings in terms of energy and maintenance make low head bubbler systems an attractive alternative to pressurized drip systems for irrigating orchards or vineyards.


Files in this item

Thumbnail
Name:
azu_td_1342993_sip1_m.pdf
Size:
4.192Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record