| Summary: | 碩士 === 國立臺灣大學 === 環境工程研究所 === 84 === The pollution of ozone in and downwind of large urban areas is
getting serious with the development of the city. The
production of ozone is in association with the emission of the
precursor and the process of photochemical reaction. We cannot
control the concentration of ozone only by reducing the
emission of the precursor. In this research, we will find the
relationship between the concentration of ozone, the emission
of pollutant and the meteorological factor by air quality
model. In this research, we develop a multi-layer photochemical
trajectory model to simulate the condition of ozone pollution.
We divide the air column into 10 layers, use the CBM IV
chemical mechanism to solve the chemical part, and Crank-
Nicolson numerical scheme to solve diffusion part. In this
research, we find that we can back 10 hours to find the
pollutant source, but we cannot treat the second day ozone
pollution. In treating the first day ozone pollution, the
performance of the model is good. In simulating the real case,
the Tainan city may increase the concentration of ozone in the
downwind area up to 180%.
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