This study was conducted in a subwatershed of the Kogma Experimental Watershed on Mount Pui, located approximately 10 km west of Chiang Mai in northern Thailand. The seasonal changes in both air temperature and rainfall show that this area has three seasons: a rainy season, an early (or cool) dry season and a late (or hot) dry season. The sub-watershed has an area of 8.63 ha covered with hill evergreen forest at a continuous canopy height of approximately 25-40 m. The dominant plant family is the Fagacea, including Lithocarpus, Quercus,and Castanopsis genera.The turbulent fluxes of sensible heat, latent heat, CO2 were measured using the eddy covariance system.
