Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol.12, Issue 4, 2010; Page No.(773-776)

SEASONAL TRENDS AND GIS-BASED SPATIAL ANALYSIS OF CARBON MONOXIDE IN MADURAI CITY

TENNYSON DANIEL, R.V. JEBA RAJASEKHAR AND P. MUTHUSUBRAMAINAN

Abstract

The present investigation is devoted not only for the estimation of the status as well as trends of carbon monoxide with respect to seasons but also for the display and analysis of CO levels in Madurai city by using GIS technology. The recorded concentration varied from 820.1 to 5497.9 μg/m3. It was noticed that the estimated concentrations of carbon monoxide were mostly below the prescribed standards (5000 μg/m3) of Central Pollution Control Board (CPCB). ERDAS IMASGINE 9.1 software and ARC GIS 9.2 were used for the preparation of GIS maps that could depict the spatial distribution of the concentration of the pollutant. Maps were generated for each season and they were superimposed to obtain the final integrated map. Low concentrations were found to occupy 40.3% whereas the medium and high concentrations were found to occupy 34.7% and 25.0% of the total extent of the city respectively. As GIS maps could depict and estimate the aerial distribution of the pollutant, it could be concluded that GIS technology would be utilized for air quality management in urban atmospheric environments.

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