Research Article
Sep 1971
Drainage of Soil Profiles
Authors: Royal H. Brooks, Benedict Ng, Gilbert L. Corey, and Arthur T. Corey, M.ASCEAuthor Affiliations
Publication: Journal of the Irrigation and Drainage Division
Volume 97, Issue 3
Abstract
The scaled approximations of Brooks and Corey for water content versus capillary pressure and capillary conductivity versus water content were used to obtain a scalded diffusion function that was dependent only upon the pore-size distribution index, λ. A predictor-corrector finite difference scheme was used to obtain numerical solutions for the scaled differential equation for drainage from vertical soil columns. Results of several numerical solutions were presented for two soil profiles and for two greatly different pore-size distributions. The effects of soil hydraulic properties upon drainage were discussed and used to interpret the term field capacity. Experimental data obtained by several independent investigators were compared with theoretical solutions of discharge as a function of time using the Brooks-Corey approximations. The comparisons between experiment and theory were reasonable and some explanations for lack of agreement were presented.
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Published In
Journal of the Irrigation and Drainage Division
Volume 97 • Issue 3 • September 1971
Pages: 455 - 467
Copyright
© 1971 American Society of Civil Engineers.
History
Published in print: Sep 1971
Published online: Feb 11, 2021
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Authors
Affiliations
Royal H. Brooks
Assoc. Prof. of Agric. Engrg., Oregon State Univ., Corvallis, Ore.
Benedict Ng
Computer Tech., Res. Lab., General Motors Corp., Warren, Michigan; formerly Grad. Res. Asst., Dept. of Math., Oregon State Univ., Corvallis, Ore.
Gilbert L. Corey
Prof., Agric. Engrg., Univ. of Idaho, Moscow, Ida.
Arthur T. Corey, M.ASCE
Prof., Agric. Engrg., Colorado State Univ., Fort Collins, Colo.
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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.