AIR POLLUTION – MONITORING MODELLING AND HEALTH

Urban Air Pollution 17
Spatial distribution: the spatial distributions are based on the length of each street category
( L Is ) in each cell of study domain. The MapInfo software is used to distribute the
parameters spatially. As expected, Fig. 6 shows that most of the urban streets are
concentrated in the districts of central HCMC.
Fig. 5. Normalized hourly distribution of Motorcycles (Moto) and Heavy trucks, per urban
and highway street category. A factor of 1.0 is attributed to the hour between 1900LT and
2000LT to both categories of streets, for a working day.
Fig. 6. The network of urban streets category in the study domain. The different colour is the
number of kilometres of street length per cell. The numbers in parentheses is the number of
cells.