ABSTRACT
The falling rate stage of evaporation (Stage 2) is dominant in drylands and responsible for most water loss in the field. Therefore, predicting its evaporation rates is of a great importance. Through an experimental approach and using Fick’s law of diffusion, a new determination method of the actual evaporation reduction rate during Stage 2 is proposed in this study. The model indicates that the water flux during Stage 2 is controlled by the receding rate of the vaporization plane, which is in turn dependent on the pore properties of the soil profile.
