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Effect of Soil Air Movement and Compressibility on Infiltration Rates¹

ABSTRACT

The purpose of the study was to determine the hydrologic significance of the soil air flow and of its compressibility in the process of infiltration and moisture redistribution. Results of a numerical solution of the equations describing the simultaneous flow of air and water in a soil are presented. The results show that the air flow and compressibility may affect significantly the infiltration rates and the saturation profiles.

¹ Contribution from Dep. of Civil Engineering, Colorado State Univ., Fort Collins 80521. This work was supported by the Dep. of Interior, Office of Water Resources Research, under OWRR B-033-Colorado.

² M.S. graduate of Colorado State Univ., Dep. of Civil Engineering, and Associate Professor of Civil Engineering, respectively.

Received for publication August 20, 1971. Accepted for publication August 31, 1971.