Research Article
Mar 1969
Salt Balance, Irrigation Efficiency and Drainage Design
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VIEW THE REPLYPublication: Journal of the Irrigation and Drainage Division
Volume 95, Issue 1
Abstract
A simplified procedure is presented to predict how much irrigation water is necessary, in addition to that for evapotranspiration, to maintain salt balance in the root zone. Key factor in the procedure is the leaching efficiency, which appears to range from 0.2 for fine-textured soils to 0.6 for coarse-textured soils. Also taken into account are the salt tolerance of the crop, the salt concentration of the irrigation water, and the evapotranspiration. The procedure accurately predicted the known leaching requirements for salt balance of three irrigated regions. In defining irrigation efficiency, distinction is made between an efficiency of water utilization and an efficiency of water application. In conclusion, it is shown how the drainage flow from the root zone decreases with time after an irrigation and how the water table response of a system of parallel drains to this flow can be computed for the design of a drainage system to avoid high water tables.
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Information
Published In
Journal of the Irrigation and Drainage Division
Volume 95 • Issue 1 • March 1969
Pages: 153 - 170
Copyright
© 1969 American Society of Civil Engineers.
History
Published in print: Mar 1969
Published online: Feb 11, 2021
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Authors
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Herman Bouwer, M.ASCE
Chief Hydraulic Engr., U.S. Water Conservation Lab., Phoenix, Ariz
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
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.