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Published in Soil Sci Soc Am J 34:551-557 (1970)
© 1970 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Freezing and Thawing Effects on Drainage1

G. R. Benoit and J. Bornstein2

ABSTRACT

Laboratory studies were conducted on insulated models containing coarse sand (1–2 mm), fine sand (0.5–1 mm) and soil (0–2 mm and 2–4.8 mm) to determine the effects of freezing and thawing on sloping land drainage. Interrelations between structure and texture, rates and extent of ice formation, and rates and magnitudes of drainage were determined. Decreasing temperatures and subsequent ice formation decreased the relative mobility of water, thereby increasing water retention and decreasing rates of water transmission. The magnitude of the short-term, freeze-thaw effects on soil water retention and transmission was influenced by soil aggregate size, aggregate stability, and soil water content during freezing. On a long-term basis, drainage that results in a consistently lower water content during freeze-thaw cycles may lead to a changed soil structure and thus a changed drainage requirement.

NOTES

1 Contribution from the Northeast Branch, Soil and Water Conserv. Res. Div., ARS, USDA and the Vermont Agr. Exp. Sta. Journal Series no. 230. Paper presented before Div. S-1 of the Soil Science Society of America, New Orleans, La., Nov. 10–15, 1968.

2 Research Soil Scientist and Research Agricultural Engineer, SWCRD, ARS, USDA, at the University of Vermont, Burlington, Vt. 05401.

Received for publication December 10, 1969. Accepted for publication March 27, 1970.






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