SIMULATION OF AIR POLLUTION VIOLENCE TO POTENTIAL AREA SELECTION OF THE AIR QUALITY MONITORING STATION IN NAKHON RATCHASIMA MUNICIPALITY, THAILAND

摘要

The purpose of the study is to generate traffic air pollution map using mathematical model and GIS (geographic information system) to determine a proper zone of AQMS(air quality monitoring station) in municipality area. The pollutants analyzed were carbon monoxide (CO), and nitrogen oxides (NO_x) which can be harmful to people living in the area. The three steps of mapping process were performed under the GIS environment using the existing vehicle emission rates and pollutant dispersion model. First, traffic volume, road network, and the emission rates of road segments varying with types of vehicle were collected from existing data. Second, the pollutant concentrations were calculated by use of CALINE4, a tool with Gaussian dispersion model. The model parameters include emission rate, wind directions and speeds, ambient temperature and observed pollutant concentration, and atmospheric stability during all seasons from the January 1, 2010 to May 31, 2011 with regardless the rainy season.This resulted in concentrations at many receptor points along links of the road network. Third, distributions of pollution concentrations were generated by means of the spatial interpolation of those from receptors. The results of pollution raster-based maps are used for determining frequency of violence map. The resulting frequency of violence will be further integrated to determine a potential area of AQMS.Finally, achieving pollution potential area of AQMS can be located as helpful basic data for efficient traffic and transportation planning.