Coupling the dispersion of particulates to wind-dependent emission rates

The emission of respirable particulates from area sources is directly proportional to the cube of the wind speed, and the dispersion of airborne particulates is directly proportional to the wind speed. The resulting downwind concentrations of wind-driven particulates are proportional to the square of the wind speed. A methodology is developed to scale the concentrations or doses calculated by regulatory models, which assume a constant emission rate, to account for the wind-dependent emission rate. Regulatory models tend to overestimate downwind concentrations in sectors where low wind speeds are most frequent, but they tend to underestimate concentrations in sectors where high wind speeds occur more frequently.