A model for dry deposition of SO/sub 2/ and sulfate aerosol is formulated, and calculations are made for four flow regimes; the outer boundary layer, the constant-flux region, within the vegetative canopy, and the viscous sublayer next to a smooth surface. The results of calculations are presented to demonstrate sensitivity of deposition to atmospheric stability, surface resistance, plant area density and structural shape, aerosol particle size, and Rossby number and canopy Reynolds number. A simple parameterized model for the SURE regional model is constructed.