Uniformity Distribution and its Economic Effect on Irrigation Management in Semiarid Zones
Publication: Journal of Irrigation and Drainage Engineering
Volume 130, Issue 4
Abstract
The management of water resources in irrigation is a fundamental aspect for their sustainability. For correct management, several tools and systems for decision making are necessary. Among the large number of factors that affect the optimization of water use, we must focus on irrigation uniformity and its economic implications. The following methodology, implemented in a computer model, allows us to carry out an economic analysis of the effects of different Christiansen’s uniformity coefficients (CU), which are useful for system design and calculation and also for irrigation management in order to obtain maximize gross margin. In the zone studied (Hydrogeologic System 08.29, Castilla-La Mancha, Spain) working with a solid set system and with four crops (barley, garlic, maize, and onion), there is an economic interest in designing systems with a high CU (90%) that allows us to obtain a high application efficiency Regarding the economic optimization of the irrigation depths, the results show that the optimum gross depths are always lower than the irrigation depths for maximum crop yield. The higher the CU, the lower the depths, while the crop yield increases and the gross margin of the crop improves. These general results present significant differences among crops, according to their water requirements and their economic profitability.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 130 • Issue 4 • August 2004
Pages: 257 - 268
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Jan 31, 2002
Accepted: Jul 30, 2003
Published online: Jul 15, 2004
Published in print: Aug 2004
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