Near real-time irrigation scheduling using the Bowen ratio technique

Persistent Link:
http://hdl.handle.net/10150/277106
Title:
Near real-time irrigation scheduling using the Bowen ratio technique
Author:
Yagi, Kazuhiko, 1957-
Issue Date:
1989
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 actual evapotranspiration rate for wheat at the Campus Agriculture Center (CAC) and alfalfa at the Maricopa Agricultural Center (MAC) were measured using the Bowen ratio technique for near real-time irrigation scheduling. The Bowen ratio method underestimated evapotranspiration when compared with AZMET and Penman data. There were problems with the hygrometer and the net radiometer which might have caused this underestimation. The height-fetch ratio requirement was not met, and this may have affected the data. Irrigation scheduling programs and the technique to schedule irrigation in a near real-time were developed. Irrigation programs were not field tested because of the problem with field data. Simulated data was successfully used to demonstrate its application. It was found that irrigation could be scheduled in a near real-time with the programs provided reliable data and proper data acquisition systems are used.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Irrigation scheduling -- Arizona -- Maricopa County -- Mathematical models.; Evapotranspiration -- Arizona -- Maricopa County.; Wheat -- Water requirements.; Alfalfa -- Water requirements.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Agricultural Engineering
Degree Grantor:
University of Arizona
Advisor:
Yitayew, Muluneh

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleNear real-time irrigation scheduling using the Bowen ratio techniqueen_US
dc.creatorYagi, Kazuhiko, 1957-en_US
dc.contributor.authorYagi, Kazuhiko, 1957-en_US
dc.date.issued1989en_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 actual evapotranspiration rate for wheat at the Campus Agriculture Center (CAC) and alfalfa at the Maricopa Agricultural Center (MAC) were measured using the Bowen ratio technique for near real-time irrigation scheduling. The Bowen ratio method underestimated evapotranspiration when compared with AZMET and Penman data. There were problems with the hygrometer and the net radiometer which might have caused this underestimation. The height-fetch ratio requirement was not met, and this may have affected the data. Irrigation scheduling programs and the technique to schedule irrigation in a near real-time were developed. Irrigation programs were not field tested because of the problem with field data. Simulated data was successfully used to demonstrate its application. It was found that irrigation could be scheduled in a near real-time with the programs provided reliable data and proper data acquisition systems are used.en_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectIrrigation scheduling -- Arizona -- Maricopa County -- Mathematical models.en_US
dc.subjectEvapotranspiration -- Arizona -- Maricopa County.en_US
dc.subjectWheat -- Water requirements.en_US
dc.subjectAlfalfa -- Water requirements.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineAgricultural Engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorYitayew, Mulunehen_US
dc.identifier.proquest1337995en_US
dc.identifier.oclc24125299en_US
dc.identifier.bibrecord.b17813402en_US
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