ZONING OF THE CITY TERRITORY BY THE LEVEL OF ATMOSPHERIC AIR POLLUTION BY NITROGEN OXIDES

Abstract

The problem of building an ecologically clean city is considered, taking into account the basic principles of its construction, maintenance, zoning of ecological functions and, at the same time, the need to maintain sustainable development. Calculations of the concentration of emissions of nitrogen oxides in fourteen transport nodes - intersections of the main roads of the city were carried out, the dispersion of the distribution of impurities in the atmosphere was determined.
 On the basis of the criterion of the traffic intensity of vehicles, the zoning of the territory around the intersections of the main roads of the city was proposed according to the level of atmospheric air pollution with nitrogen oxides: safe zones, where the content of nitrogen oxides is less than the average daily maximum permissible concentrations (maximum allowable concentration = 0.04 mg/m3); zones of low safety, where the content of nitrogen oxides is less than the maximum one-time maximum permissible concentration (maximum allowable concentration = 0.4 mg/m3); hazardous zones, where the level is higher than the maximum allowable concentration, constant monitoring and special treatment facilities are needed.
 The calculation of the traffic intensity of vehicles, which is necessary to achieve the maximum allowable rate for nitrogen oxide emissions, and the ratio between the substances. Sanitary protection zones-territories around the main hubs, where nitrogen oxides have a harmful effect on the environment and human health, have been calculated. It was revealed that the predominant north-western direction of winds leads to an increase in the territory of pollution up to 850 m, if the highway has eight lanes. A conceptual model of the transition to clean air in urbanized areas is proposed, according to which, in fact, it is necessary to solve the problems of coexistence and protection:
 - a person who seeks to live comfortably, and comfort requires constant progress and at the same time preserving his health;
 - transport, which is associated with the need to quickly move goods and services, requires sustainable economic development and leads to climate change;
 - the environment, the state of which under anthropogenic influence is deteriorating against the background of intensification of natural disasters.