Abstract
The need for management of tunnel air quality is imminent considering the rapid increase of number and span of tunnels in Korea. To investigate spatial distribution of within tunnels, were measured and model simulations were performed in Namsan 1 tunnel. Results show that concentrations were 250 ppm to 400 ppm higher in the exit than tunnel entrance. Also, concentrations were 200 ppm to 300 ppm lower inside no ventilating vehicle than in the tunnel. Both experimental and model simulation results show that spatial distribution and concentration gradient of air pollutant inside tunnel are highly dependent on traffic density.
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