Estimation of basin transpiration based on heat pulse velocity and micrometeorological data and comparison with one estimated by water budget method

Abstract

This study investigates an estimation method of basin transpiration based on heat pulse velocity and micrometeorological data by making use of solar radiation on several slopes which consist a basin. The basin transpiration is calculated by the weighted mean of transpiration on each slope, taking advantage of the area of each slope. The proposed method is applied to the data observed in the Shirakawadani experimental basin in Tokushima prefecture. The cumulative transpiration over several months agrees with the estimation by water budget method.