Experimental Study on Water Path Flow in Unsaturated Medium

Abstract

Water path flow was examined using the unsaturated medium consisted with glass-beads of uniform diameter.
Experimental results showed that the ratio of width of water path to that of the total layer decreased as the glass-bead diameter increased and that the mobile water content was smaller than the total water content in the water path.
These results could be explained more comprehensibly by the capillary model presented by Tamai et al.(1987) than by the conventional method using the hydraulic conductivity.