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Atmosphere 2016, 7(7), 93;

Influence of Grid Resolution in Modeling of Air Pollution from Open Burning

Department of Sanitary Engineering, Faculty of Public Health, Mahidol University, Bangkok 10400, Thailand
Center of Excellence on Environmental Health and Toxicology (EHT), Bangkok 10400, Thailand
Author to whom correspondence should be addressed.
Academic Editor: Robert W. Talbot
Received: 19 May 2016 / Revised: 1 July 2016 / Accepted: 14 July 2016 / Published: 21 July 2016
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Influences of different computational grid resolutions on modeled ambient benzene concentrations from open burning were assessed in this study. The CALPUFF (California Puff Mesoscale Dispersion Model) was applied to simulate maximum ground level concentration over the modeling domain of 100 × 100 km2. Meteorological data of the year 2014 was simulated from the Weather Research and Forecasting (WRF) model. Four different grid resolutions were tested including 0.75 km, 1 km, 2 km and 3 km resolutions. Predicted values of the maximum 24-h average concentrations obtained from the finest grid resolution (0.75 km) were set as reference values. In total, there were 1089 receptors used as reference locations for comparison of the results from different computational grid resolutions. Comparative results revealed that the larger the grid resolution, the higher the over-prediction of the results. Nevertheless, it was found that increasing the grid resolution from the finest resolution (0.75 km) to coarser resolutions (1 km, 2 km and 3 km) resulted in reduction of computational time by approximately 66%, 97% and >99% as compared with the reference grid resolution, respectively. Results revealed that the grid resolution of 1 km is the most appropriate resolution with regard to both accuracy of predicted data and acceptable computational time for the model simulation of the open burning source. View Full-Text
Keywords: benzene; CALPUFF; grid resolution; maize residue; open burning; Thailand benzene; CALPUFF; grid resolution; maize residue; open burning; Thailand

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Sirithian, D.; Thepanondh, S. Influence of Grid Resolution in Modeling of Air Pollution from Open Burning. Atmosphere 2016, 7, 93.

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