Similarity law is tested over a forest in a complex terrain. For the wind from the valley zero-plane displacement showed reasonable value, about 0.7 of the canopy height. However, for the wind from the ridge, it sometimes became negative. The non-dimensional profiles of wind speed and temperature for the wind from the valley indicated a similar shape as observed over flat terrains; however, for the wind from the ridge it did not obey the law.
Wind profiles inside the canopy showed a secondary peak near the forest floor for the wind from the ridge, but this peak was not clear when wind was from the valley. These characteristics including the variance of the turbulence are examined by using the 2nd-order turbulence closure model for the horizontally homogeneous field. The results indicate that the flow from the valley in this terrain is similar to that for homogenous flat forests.