Geographia Technica, Vol 15, Issue no.1/2020, pp. 102-111
SO2 DISPERSION MODELING EMITTED FROM HONGSA COAL-FIRED POWER PLANT TRANSBOUNDARY TO NAN PROVINCE, THAILAND
Supawan SRIRATTANA, Kitsanateen PIAOWAN
ABSTRACT: Coal-fired power plant in general is a major source of sulfur dioxide (SO2) emission. SO2 is a primary pollutant and known as a respiratory irritant. The aim of this paper is to present the methodologies and results of an application of the dispersion modelling AERMOD as a potential model to predict the air quality impacts of SO2 released by the flue stack of Hongsa coal-fired power plant (HCPP) located in Lao People's Democratic Republic (Lao PDR) transboundary to five villages in Chaloem Phra Kiat district, Nan province, Thailand during dry season (October to February) between 2015 and 2017. The results show that the hourly and daily modeled maximum ground-level concentrations of SO2 were lower than Thailand's air quality standard, at 780300 and µg/m3, respectively. The highest hourly and daily SO2 concentration were found at Ban Nam Ree village in January as high as 92.254 and 5.021 μg/m3, respectively. In contrast, SO2 deposition, Ban Huai khon village was modeled to suffer from the highest impact from SO2 deposition as 0.003 g/m2 via dry deposition.
Keywords: Coal-Fired Power Plant, AERMOD, Transboundary, SO2
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