1997 Volume 41 Pages 49-54
Evapotranspiration is one of the most impotant components of hydrological circulation for water resources planning and management. Simple method requiring a few meteorological data which are easily obtained is necessary for analysis on water balance in large-scale area, especially in developing countries. Furthermore, evaporation caused by rainfall interception, and transpiration should be divided, because they are different hydrological processes in themselves. In this study, a simple mathematical models for separately estimating daily transpiration and evaporation in rainfall events were developed. The models were applied to the observation obtained in a small forested mountain basin in Tokushima prefecture, and the validity of the models were investigated.
