THE INFLUENCE OF GROUND COVER ON THE DRY DEPOSITION RATE OF GASEOUS MATERIALS

摘要

We discuss dry deposition rates for gaseous pollutants such as SO2 on vegetated surfaces. From the discussion there follows a scheme for calculating deposition velocity. This scheme takes into account the equally important roles of aerodynamic and surface processes. In treating the surface-dependent part of the problem, we have identified those features which are of major importance and we discuss their parameterization. Results, derived for typical situations, show the manner in which the kind and condition of surface cover affects deposition rate. The concluding section points out the necessity for empirical validation, particularly for the case of forest cover.