The cool-temperate deciduous broadleaf secondary forest (TKY site) at the Takayama Experiment Site of the Center for Watershed Science, Gifu University, was established in 1993 as the core site of the Center for Watershed Science, Gifu University. It is located at an altitude of 1,420 m on the mountainside of Mt. Norikura in Takayama City, Gifu Prefecture, almost in the middle of the Japanese archipelago, and has a site area of about 5 ha.,It belongs to a cool-temperate zone, with distinct variations in temperature, precipitation, and solar radiation. There is snow from late November to April, with a maximum snow depth of 1 to 2 meters. The site is accessible by car, and it is very convenient for loading and unloading the various tools and equipment needed for research and surveys. The forest is a secondary deciduous broadleaf forest dominated by Japanese white birch, Japanese red birch, and Quercus crispula, with dense stands of Quercus crispula growing on the forest floor. The soils are black-brick soils with a dark and thick surface layer. The turbulent fluxes of sensible heat, latent heat, CO2 were measured using the eddy covariance system. ,
