Environmental Security Management of the Megapolis

Abstract

The article is devoted to the study of the level of air pollution in the street canyons of Kyiv and to determine the conditions under which the concentration of pollutants will exceed the maximum allowable values. Today, cities face a range of environmental problems, including air pollution. When determining the level of concentration using field research and mathematical modeling, which allows you to build fields of pollution and reflect their spatio-temporal dynamics. The object of research is the pollution level of city street canyons and their assessment. The purpose of the work is to model the level of pollution of the street and road network of Kyiv and to assess its ecological condition. Research methods – statistical methods, mathematical modeling. The main approaches to modeling the dispersion of pollutants in the atmosphere from road transport are analyzed. Modeling the level of air pollution in cities is advisable to carry out in homogeneous structures of the urban area – street canyons. The article defines the daily dynamics of the level of atmospheric air pollution in the street canyons of the Pechersky district of Kiev and establishes the critical values of the traffic flow intensity at which the concentration of pollutants exceeds the maximum permissible values. An interval assessment of the level of pollution of city streets is carried out, taking into account the variability of meteorological values. Thus, the obtained results will allow to quickly forecast the level of air pollution in the city and timely implement the necessary environmental measures. KEY WORDS: ENVIRONMENTAL SAFETY, STREET ROAD NETWORK, TRANSPORT FLOWS, STREET CANYON, POLLUTION LEVEL, MAXIMUM PERMISSIBLE CONCENTRATION.