Research Article
Jun 1975
Unsaturated Flow During Soil Treatment of Septic Tank Effluent
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VIEW THE REPLYPublication: Journal of the Environmental Engineering Division
Volume 101, Issue 6
Abstract
Subsurface soil disposal of septic tank effluent is governed by physical flow processes in unsaturated soil. The capacity of a soil to accept, conduct, and purify effluent cannot be expressed by percolation tests or by hydraulic conductivities at saturation alone. Field tests are available now to measure complete K-curves and application to many soils in Wisconsin has shown that four different types of curves can be distinguished. Effects of biological clogging or mechanical compaction, or puddling on infiltration into the soil are examined, considering different levels of the water table and using a simple one-dimensional flow theory. Results of in situ monitoring with tensiometers of 12 seepage systems in different soils and design criteria, some tentative, for innovative systems in a wide range of soils are considered. Use of soil survey information for purposes of extrapolation of research results from tested to untested sites is recommended.
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Information
Published In
Journal of the Environmental Engineering Division
Volume 101 • Issue 6 • June 1975
Pages: 967 - 983
Copyright
© 1975 American Society of Civil Engineers.
History
Published in print: Jun 1975
Published online: Feb 11, 2021
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Authors
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Johannes Bouma
Soil Scientist, Soil Survey Inst., Wageningen, The Netherlands; formerly, Assoc. Prof. of Soil Sci., Soil Sci. Dept., Coll. of Agr. and Life Sci. and Wisconsin Geological Natural History Survey, Univ. of Wisconsin, Madison, Wisc.
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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.
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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.