Air quality impact assessment of a 600 MW thermal power plant (Raigarh) by air quality modeling
Student name: Ms Richa Mishra
Guide: Dr Prateek Sharma
Year of completion: 2010
Host Organisation: J M EnviroNet PVT Ltd
Supervisor (Host Organisation): Ms Anuradha Chauhan
Abstract: The work presents the scenario of air quality when a proposed 600 MW thermal power plant will become operational in the Raigarh district of the state Chattisgarh India. The main aim of the work is to implement mathematical model to determine the concentration of criteria pollutants.
The AERMOD is a steady state dispersion model. The modeling is done for the proposed 600MW thermal power plant therefore the main source of emission of the pollutants will be the Thermal power plant. The study period is March to May 2009 (Pre-monsoon Season).
Input data required for running the model includes metrological data (hourly data of Temperature, Pressure, Cloud Cover, Ceiling Height, etc.), Satellite image of the location to get the land use land cover and stack related parameters (Emission rate,
Temperature of the Exhaust Gases, Release Rate, etc.). The data for metrological Parameter has been collected from IMD. The Upper air data for the Indian Stations are not available, but the AERMOD Modeling system estimates the Upper air condition on the basis of surface data. As a result the output obtained from the model is the one hour and 24 hour average concentration of the SOx, NOx and SPM. The condion is Rural and the terrain is simple.
The maximum concentration obtained in the area of downwind direction. The incremental pollution has also been considered in the study area. The concentration of these pollutants is well within the limit of the NAAQS prescribed by the MoEF.
Finally some model recommendation about model improvement has been presented.
Keywords – AERMOD, NAAQS, Surface Roughness, Dispersion Modeling, Bowen Ratio, Albedo
