World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
Abstract
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\ub0 56.6` 42.4`` and the width of 52\ub0 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%