A NUMERICAL SIMULATION OF TRANSPORT PROCESS OF MOBILE SPM WITH RANDOM-PUFF MODEL

Abstract

Air pollution is getting serious in urban areas by increase of automobile traffic. A variety of methods to control the traffic have been proposed, but efficiency of the methods has not been examined quantitatively yet. It's important to develop a system to simulate a series of processes from an occurrence of automobiletraffic to reaction and deposition of pollutants. In this study, we are trying to construct such a system with HOTMAC of a mesoscale meteorological simulation model and RAPTAD, a sort of random walk model to calculate transport process of pollutants in an urban area. And the mobile source emissions are estimated by using road traffic census data and emission function in RAS-W. Here we simulate behavior of SPM (Suspended Particulate Matter) which is ejected by automobiles in Osaka area under a various meteorological conditions to examine a validity of thesystem.