| 英文摘要 |
This project builds upon the achievements of previous initiatives. This year, historical event days for various weather patterns have been added to assess the pollution reduction benefits of contingency measures for the top thirty major stationary pollution sources and fugitive pollution sources. The aim is for the results of these reduction benefits to serve as a reference for the Ministry of Environment in formulating relevant contingency control measures. According to the results of the reduction benefits, even with a severe reduction of 25% in emissions from the top thirty major stationary pollution sources, the differences in daily average PM2.5 concentrations range from 0 to 0.41 μg/m3 across all weather patterns. As for differences in hourly average ozone concentrations, they range from -1.14 to 0.15 ppb, indicating relatively small reduction benefits from the top thirty major fixed pollution sources. Collaborative reduction measures with other industries (such as the textile industry) or source categories (such as power plants, mobile sources, and fugitive sources) are necessary to improve air quality.
In terms of fugitive pollution sources, based on the application of this year's compilation of four types of domestic and foreign contingency measures (vehicle dust, construction sites, residential/commercial burning, and agricultural burning), percentage reductions in emissions were calculated. The results show that if contingency measures are implemented on days prone to PM2.5 exceeding the orange alert level in the Yunlin-Chiayi-Tainan and Kaohsiung-Pingtung regions, the differences in daily average PM2.5 concentrations range from 0.12 to 4.79 μg/m3 across all weather patterns. As for differences in hourly average ozone concentrations, they range from 0.03 to 1 ppb. This indicates that the reduction of fugitive pollution sources has a significant improvement effect on PM2.5.
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