Determination of Vehicular Pollution in the Road Tunnel of Vana (Haraz Road) in the North of Iran|
Zazouli, Mohammad Ali; Jolodar, Abbass Nattaj & Hoseinei, M.
The combustion of fuels (gasoline, LPG, diesel oil, and so on ...) in vehicle engines produces a lot
of substances and gases. Depending on their concentration, their chemical stability and their adverse effects on
environment and human being, the most relevant compounds in the exhaust gas are SO2, CO, NOx, H2S and O3.
Traffic is the source of pollution in a road tunnel, It has a harmful impact on Human health .The aim of the study is
to analyze the amount of atmospheric pollution emitted by vehicular traffic in the road tunnel of Vana which is
situated between the provinces of Tehran and Mazandaran in Iran. The geometric characteristics of the tunnel are:
the length (1500 m, the longest tunnel), the height (5.5 m) and the mean slope (3%). It is placed in Haraz road, a
geographical situation by the length of 35° 56.6` 42.4`` and the width of 52° 15.28` 33.7``.Traffic is undoubtedly
one of the important sources of environmental and air pollution. The concentration of pollutants was measured by
Babucr A (a portable device with several sensors) in the nine stations in tunnel. Concentrations were measured
after diesels and gasoline car traffic in moment , statistical and within a period of one hour and 8 hours .The
results showed that SO2, CO, NO, H2S and O3 were 0.47, 57.13, 3.58, 1.2and 0.13ppm respectively, within a
period of 8 hours. And also the difference of monthly results was lower than 1.5%.