Research Article
Mar 1969
Displacement Front Under Ponded Leaching
Authors: James N. Luthin, M.ASCE, Pedro Fernandez, Boris Maslov, Jack Woerner, and Frank RobinsonAuthor Affiliations
Publication: Journal of the Irrigation and Drainage Division
Volume 95, Issue 1
Abstract
The leaching of tile-drained soils by ponding water on the soil surface is examined both experimentally and theoretically. A method of analyzing the movement of the displacement front (demarcation between saline soil water and fresh leaching water) is presented. The method is based on piston-type displacement of the saline soil water by the added leaching water. In this initial analysis the presence of precipitated salts, hydrostatic dispersion and soil-chemical reactions are ignored. The experimental results obtained on a 15 × 6 × 3 foot tank show satisfactory agreement to the theoretical results obtained by solving Kirkham's equation for the ponded water case. The results indicate that ponded leaching is inefficient in removing salts midway between the drains. Intermittent leaching by applying excessive amounts of irrigation water should be more efficient in controlling the soil salinity.
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Published In
Journal of the Irrigation and Drainage Division
Volume 95 • Issue 1 • March 1969
Pages: 117 - 126
Copyright
© 1969 American Society of Civil Engineers.
History
Published in print: Mar 1969
Published online: Feb 11, 2021
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Authors
Affiliations
James N. Luthin, M.ASCE
Prof. of Water Science and Civ. Engrg., Univ. of Calif., Davis, Calif
Pedro Fernandez
Former Graduate Student, Univ. of Calif., Davis, Calif
Boris Maslov
Soviet participant in exchange program, Univ. of Calif., Davis, Calif
Jack Woerner
Asst. Development Engr., Univ. of Calif., Davis, Calif
Frank Robinson
Assoc. Irrigationist, Univ. of Calif., Field Station, El Centro, Calif
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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.
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