Venkata Bhaskar Rao Dodla , China Satyanarayana Gubbala, Srinivas Desamsetti

  • Department of Atmospheric Science, K L University, Andhra Pradesh 522502, India

Received: July 1, 2016
Revised: October 20, 2016
Accepted: November 8, 2016
Download Citation: ||https://doi.org/10.4209/aaqr.2016.07.0294 

  • Download: PDF


Cite this article:
Dodla, V.B.R., Gubbala, C.S. and Desamsetti, S. (2017). Atmospheric Dispersion of PM2.5 Precursor Gases from Two Major Thermal Power Plants in Andhra Pradesh, India. Aerosol Air Qual. Res. 17: 381-393. https://doi.org/10.4209/aaqr.2016.07.0294


HIGHLIGHTS

  • Prediction of meteorological variables using ARW model.
  • Assessment of seasonal variation of wind flow.
  • Simulation of dispersion of SO2 and NO using HYSPLIT model.
  • Pollutant dispersion over two urban complexes.

 

ABSTRACT


Fine particulate matter (PM2.5) predominantly comprises sulphates and nitrates, which results from sulphur dioxide (SO2) and nitrogen oxide (NOx) gases that are emanated from excessive industrial activities and transport systems. PM2.5 is known to affect respiratory health in humans. Coal-fired thermal power plants are a major source of SO2 and NOx gases. Evaluation of the dispersion characteristics of these precursor gases from the power plants would help understand the vulnerability. Meteorological conditions that prevail over the region would influence the dispersion characteristics. In this study, dispersion of SO2 and NO from two major coal-fired thermal power plants in Andhra Pradesh, India have been studied using an integrated modeling approach of the Advanced Research Weather Research & Forecasting (ARW) model and Hybrid Single-Particle Lagrangian Integrated Trajectory (HYSPLIT) model. Meteorological conditions are obtained at 3-km resolution using the ARW model and dispersions of SO2 and NO is computed using the HYSPLIT model for the four seasons of winter, summer, monsoon and post-monsoon. Forward trajectories produced by the HYSPLIT model show diurnal variations and dispersion patterns show seasonal variations indicating the influence of meteorological conditions. Dispersion characteristics show high dispersion in winter due to calm and stable atmospheric conditions to insignificant in summer season due to stronger winds and higher atmospheric instability. The study establishes the usefulness of integrated meteorological and dispersion models for the evaluation of pollutant dispersion.


Keywords: Particulate matter; Dispersion; Power plants; ARW model; HYSPLIT


Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

Coronavirus COVID-19 articles from Aerosol and Air Quality Research

2018 Impact Factor: 2.735

5-Year Impact Factor: 2.827


SCImago Journal & Country Rank

Sign up to AAQR Newsletter

Sign up to receive latest research, letters to the editors, and review articles, delivered to your inbox every second week!