Volume No. 7 Issue No.: 1 Page No.: 131-138 July-September, 2012

 

AN ANALYTICAL MODEL FOR POLLUTANTS DISPERSION RELEASED FROM DIFFERENT SOURCES IN ATMOSPHERIC BOUNDARY LAYER

 

Kumar Anikender and Goyal P.*

Centre for Atmospheric Sciences, Indian Institute of Technology Delhi, Hauz Khas, New Delhi (INDIA)

 

Received on : July 05,2012

 

ABSTRACT

 

An analytical model for dispersion of air pollutants released from point, line and area sources is formulated by considering the wind speed as a power law profile of vertical height above the ground and vertical eddy diffusivity as an explicit function of downwind distance from the source and vertical height in Neumann (total reflection) boundary conditions. The standard deviation of eddy diffusivity in lateral direction depends on the downwind distance. The analytical formulation of the line source is obtained by integrating the formulation of point source in crosswind direction and area source is obtained by integrating the point source in downwind and crosswind directions. An emission inventory of Respirable Suspended Particulate Mater (RSPM ) emitted from different sources namely vehicles, domestic, industries and power plants, has been made using the primary and secondary data in Delhi. The analytical model is evaluated using observed concentration at various locations in Delhi obtained from Central Pollution Control Board (CPCB), Delhi, India and National Environment Engineering Research Institute (NEERI), Nagpur, India. The modelís predicted values are found well in agreement with the observed values. The performance of model is found to be satisfactory. The same model can also be used for any urban city.

 

Keywords : Analytical model, Point source, RSPM, Eddy diffusivity, Emission inventory

 

 

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