| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 96 === Abstract
The main study is to analyze the change of pollutions from 1993 to 2006,
according to the pollutants statistics of 21 air quality monitoring stations in
Taichung, Changhua, Nantou, Yunlin, Chiayi, and Tainan. The research can
find out the relationship between pollution source and the statistic result of
pollutant database. By statistics, it shows there is a tendency that pollutions,
except for ozone pollution and PM10, had decreased. Especially in Jushan
station, it is very serious in these five years. Otherwise, some regions shows
a decreasing trend of PM10. The region of Chiayi, however, has obviously
increased.
Although the air quality change in a long term is much slower by the
observation, the research needs to understand what are vital pollution
sources resulting in that change. By comparing with polluted years and the
time of building major infrastructures in the central and south region,
examining the distribution of wind direction and wind speed, and finally using
backward trajectory, the result reveals two reasons why the air quality
changes. One is that the weak wind in fall causes the pollution concentration
not to disperse easily. Another is sea-land breeze which brows pollutions
back to the land. Moreover, the major pollution source is from the central
region, such as the Formosa Plastic Group’s Sixth Naphtha Cracking Plant,
Taichung fire power plant, Taichung metropolis, Chiayi metropolis, and Maioli
fire power plant. To sum up, they are related to the air quality change.
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