PHYSICAL MODELING OF A FINITE FOREST AREA – TRANSPORT OF BIOGENIC EMISSIONS

An improved concept for the physical modeling of a forest area has been designed in order to characterize the flow structure in the model of the finite and inhomogeneous forest area of the Research center of Jülich. The turbulence properties of the approach flow and of the canopy flow are quantified and compared with guidelines or previous studies. The comparison with other dense forest canopies is satisfying since the mean and turbulent velocity profiles and the spectral distributions above and inside the canopy are in agreement with field data. Thus, the profiles of integral length scales through the forest canopy show similar evolutions to those found in literature. Since the quality of the physical modeling has been proved, this model of a finite forest area can be used for dispersion applications in order to provide information about the origin, the trajectory and the age of the emissions sampled at the measurement towers during field campaigns (presented orally).