Ambient Air Quality Status of an Urban Area -a Case Study of Tirupati
Urban Environs are distressed from air pollution due to Industrial and Automobile emissions and thus air quality status of most of the cities are alarming. This necessitates a system of air quality monitoring and surveillance so that the associated environmental impact on a selected area can be predicted and quantified and appropriate management strategies can be initiated. Present study was carried out to assess air quality status of Tirupati, a growing urban area in the State of Andhra Pradesh of India. The Study was planned systematically by installing 23 sampling stations encompassing different zones following the classification by the Urban Authority such as residential zones, commercial zones, industrial and silent zones and monitored in terms of selected parameters like SPM, RSPM, SO2and Nox. The study revealed marked spatial and temporal variations of each of the pollutant monitored. The results of each zone were further compared with national Ambient Air Quality (AAQ) standards. In Residential zone, monitored values of all parameters such as SPM, RSPM, Nox and SO2 are within the Ambient Air Quality (AAQ) standards except in one or two locations abutting the commercial establishments in which case the values of SPM and RSPM were higher. In commercial zone, both SPM and RSPM concentrations exceeded the standard limit at all locations. Nevertheless, the concentrations of Nox and SO2 are within the AAQ standards. In the industrial zone, all the monitored pollutants are within the threshold limit. In the silent zone, the concentrations of SPM exceeded the AAQ standard, while the concentrations of RSPM, Nox and SO2 were well within the AAQ standards. Further, from AAQ data, Oak Ridge-Air Quality Index (ORAQI) was calculated and the values of ORAQI lie in the range of good category for most of the locations in the Residential zone whereas in the commercial zone, majority of locations lie in bad category. In the industrial zone, ORAQI values lie in good category whereas in the silent zone, almost all locations lie in poor category. As the monitored values of SPM and RSPM are alarming, some mitigation measures have been proposed to bring the values within the limits and to improve the air quality.
urban air quality monitoring assessment Oak Ridge-Air Quality Index mitigation measures
I. Gopi KRISHNA M. SRIMURALI J. KARTHIKEYAN
Department of Civil Engineering, College of Engineering, Sri Venkateswara University Tirupati-517 502, Andhra Pradesh, India
国际会议
2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)
北京
英文
2007-11-13（万方平台首次上网日期，不代表论文的发表时间）