IMPROVING THE METHODOLOGY FOR MONITORING AND FORECASTING THE DANGEROUS EFFECTS OF MOTOR VEHICLES AND SHIPS ON THE ATMOSPHERE IN THE ZONES OF THEIR JOINT INFLUENCE

The article describes a comprehensive methodology for monitoring and forecasting the hazardous effects of emissions from motor vehicles and recreational vessels in zones of their joint influence. The methodology is based on updated information on the structure of the traffic flow and the intensity of traffic of vehicles and vessels in the historical center of St. Petersburg and on the use of pollutant emission factors for accounting categories of cars, single-deck passenger ships and small vessels obtained experimentally. The results of the approbation of the developed methodology showed that near the surveyed sections of highways, the calculated concentrations of nitrogen dioxide can reach values from 1,89 to 7,22 of the maximum permissible concentration, and carbon monoxide from 1,40 to 3,49 of the maximum permissible concentration, which may pose a risk to the health of the population of Saint-Petersburg.