Abstract
This paper is investigated the comprehensive study of the nitrogen dioxide pollution distribution in a specific street in Almaty city, Kazakhstan. It was given a generalized description of the porous medium and the effect of porosity on the spread of nitrogen dioxide. The calculated obtained results were analyzed by comparison with the previous data. Based on the study of different cases, it was detected that the existing of superposed barrier along the road essentially decreases the level of greenhouse gas concentrations near the pedestrian zone. The optimal variant of the combined barrier with a height of 2.5 m and a tree with a total height of 15 m, where the stem is 3 m, and the crown with a height of 12 m, has the property of permeability(porosity), was chosen. This type of barrier normalizes the ventilation properties in the street canyon and protects the pedestrian zone from poisonous gasses.
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