Combustion of coal in power plants can result in sulfur dioxide emissions. When sulfur dioxide is in the atmosphere with water it produces sulfuric acid (sulfate aerosol). Measured sulfate aerosol concentration over a forest averages 10.4 µg/m3.

Estimate the dry deposition of sulfate aerosol to the forest if the deposition velocity is 1.5cm/sec.

Estimate the wet deposition of sulfate aerosol to the forest if the deposition velocity is 0.5m/sec.

washout ratio = 130