VALIDATION OF AERMOD MODEL FOR CO AND NOX AT MADURAI CITY, INDIATENNYSON DANIEL, R.V. JEBA RAJASEKHAR, P. MUTHUSUBRAMAINAN
The present investigation pertains to measurement, modeling and validation of AERMOD model with special reference to criteria air pollutants such as nitrogen oxides and carbon monoxide in the atmospheric environment of Madurai city. The recorded concentration of NOx varied from 64.0 to 82.9 mg/m3, whereas the predicted concentrations of NOx ranged between 67.3 and 84.1 mg/m3. The experimental concentrations of CO ranged between 1.9 and 4.8 ppm and the predicted concentrations of CO varied from 2.4 to 4.3 ppm. While comparing the recorded concentrations with the permissible concentrations of the pollutants, it was found that the concentrations were mostly within the permissible limits set by CPCB at most of the sampling sites of the present investigation. While considering the overall performance of the model, it was found that there was reasonable prediction pattern of concentrations of both the pollutants. At the same time, a better agreement was found between the observed and the predicted concentrations for the pollutant NOx than that of the pollutant CO. It could be concluded that NOx prediction using AERMOD model would be executed in future for specific applications like air quality management, air pollution abatement and epidemiological correlation that would require precise prediction patterns as inputs for the sustainable development of the city.
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