MODEL PREDICTION OF POLLUTION STANDARD INDEX FORFIVE STANDARD POLLUTANTS: A TOOL FOR ENVIRONMENTAL IMPACT ASSESSMENT [ READ ]
Terry Henshaw and Ify L. Nwaogazie
Modeling pollution standard index (PSI) in Choba townfor five standard pollutants (NO2, SO2, PM2.5, PM10 and O3)is presented. The method used involved sorting all pollutants considered into standard forms of measurements in line with the PSI breakpoints. Results showed that the most critical pollutants in Choba junction are PM10, SO2 and O3. From the 5 day field observations,PM10 showed hazardous PSI level of 352 once, SO2 showed very unhealthy PSI level twice (253 and 228) and O3 showed very unhealthy PSI level twice (227 and 221). PSI models were developed for SO2, PM2.5, PM10 and O3 and they showed high coefficient of correlation of 0.99, 0.98, 0.93 and 0.95 respectively. When compared with the PSI model for CO it was discovered that wind speed showed significance for only the CO PSI model. The summary of these results showed that human activities in junctions can affect the type of pollutant which determines the PSI health category. It is recommended that government policies regulating retail sellers around junctions should be strictly enforced especially in the evenings/night periods when the atmospheric stability impedes dispersion of pollutants.
Terry Henshaw and Ify L. Nwaogazie
Modeling pollution standard index (PSI) in Choba townfor five standard pollutants (NO2, SO2, PM2.5, PM10 and O3)is presented. The method used involved sorting all pollutants considered into standard forms of measurements in line with the PSI breakpoints. Results showed that the most critical pollutants in Choba junction are PM10, SO2 and O3. From the 5 day field observations,PM10 showed hazardous PSI level of 352 once, SO2 showed very unhealthy PSI level twice (253 and 228) and O3 showed very unhealthy PSI level twice (227 and 221). PSI models were developed for SO2, PM2.5, PM10 and O3 and they showed high coefficient of correlation of 0.99, 0.98, 0.93 and 0.95 respectively. When compared with the PSI model for CO it was discovered that wind speed showed significance for only the CO PSI model. The summary of these results showed that human activities in junctions can affect the type of pollutant which determines the PSI health category. It is recommended that government policies regulating retail sellers around junctions should be strictly enforced especially in the evenings/night periods when the atmospheric stability impedes dispersion of pollutants.
