The project was conducted to demonstrate the applicability of numerically modeling the transport of pollution in street canyons. The numerical model employs the solutions of the fully nonlinear, three-dimensional Navier-Stokes equations along with a transport equation for pollutants, for regions of space in which obstacles or buildings cause strong distortions in the flow fields. The numerical technique is used to model three-dimensional flows for which some experimental data have been obtained. This includes calculating the distribution of pollutants in the Broadway Street Canyon in downtown St. Louis, Missouri. Also, the numerical method is used to calculate pollutant distributions in a non-specific street canyon; that is, a street canyon in which the geometry and other important non-dimensional flow parameters give rise to solutions that are applicable, in a general sense, to a variety of street canyons. (Modified author abstract)

EPA project officer: William H. Snyder. Prepared by University of California, Los Alamos Scientific Laboratory. Contract Number: EPA-IAG-0122(D) "June 1973." Final report. Includes bibliographical references. "EPA/R4-73-029."