Research Article
Mar 1972
Optimal Irrigation Quantity and Frequency
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VIEW THE REPLYAuthors: I-pai Wu, M.ASCE, and Tung LiangAuthor Affiliations
Publication: Journal of the Irrigation and Drainage Division
Volume 98, Issue 1
Abstract
Mathematical models are derived for two different irrigation practices: (1) Soil moisture is kept equal or below the optimal soil moisture and (2) soil moisture is allowed to fluctuate above or below the optimal soil moisture. Evaluation of models indicated that the optimal irrigation quantity and frequency can be determined when irrigation costs and average consumptive use are known. The major irrigation cost consists of expense and economic losses. The former is the cost of purchasing and delivering water to the farm and the latter is the loss caused by crops grown under unfavorable soil moisture conditions. The optimal soil moisture, optimal yield and cost functions are obtained from irrigation experiments. Two examples are presented for lettuce and celery crops in Hawaii. The developed technique can be used for other crops if similar information is available. This study showed that the general irrigation practice, irrigating to the field capacity, is not always the optimal irrigation schedule.
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Published In
Journal of the Irrigation and Drainage Division
Volume 98 • Issue 1 • March 1972
Pages: 117 - 133
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: Mar 1972
Published online: Feb 11, 2021
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Affiliations
I-pai Wu, M.ASCE
Assoc. Prof. of Agric. Engrg.; Univ. of Hawaii, Honolulu, Hawaii
Tung Liang
Assoc. Prof. of Agric. Engrg.; Univ. of Hawaii, Honolulu, Hawaii
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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.
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.