Urban diffusion problems.

Abstract

Because of the obvious problems of urban air pollution and the stringent regulations laid down by governments, there has been a great increase in the number of observation programs and theoretical and applied studies of urban diffusion. But since most of this work has been directed towards solving local problems, there have been relatively few advances in the science of estimating urban air pollution. Studies tend to concentrate on monitoring programs or on straightforward application of existing techniques. Many of these studies are quite complex, due to the large number of computer calculations which must be made in the process of insuring numerical stability or accounting for the multiple sources and receptors. (from paper)