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Comparison of Computed and Measured Moisture Redistribution Following Infiltration¹

ABSTRACT

Redistribution of water was measured in three soils following two different initial amounts of infiltration. The measured redistribution profiles were compared with those computed from the flow equation taking into account hysteresis in the drying tension vs water content relationship. Agreement between measured and computed moisture profiles was considered satisfactory. A procedure was outlined for determining wetting diffusivities and conductivities in the wetting front on the basis of soil moisture profiles obtained during redistribution. The different shapes of the drying scanning tension curves provided some insight into the differences in particle size distribution that influence the water-holding capacity of soils.

¹ Contribution no. 302. Soil Research Institute, Canada Department of Agriculture, Ottawa, Ontario.

² Soil Physicist.

Received for publication March 6, 1969. Accepted for publication July 3, 1969.