Abstract
The techniques of numerical simulation are expected for the prediction of wind flows over various kinds of complex terrain. However the optimum method for use of this technique has not been established to this day. Here the basic concept, scope and status of the numerical prediction of the wind flows over the terrain are investigated. In order to clarify the effects of the undulation and the roughness of the ground surface on the wind characteristics such as the vertical profile of the time-averaged and the fluctuating wind velocities, from an engineering point of view it is proposed how to simulate the wind flows over various terrains. Finally I show some numerical examples for an actual complex terrain model as well as a single basic model like a hill.
