Ecological substantiation of formation of the large city planting system

The subject of the research: the ecological justification of planting a large city in the context of the formation of conditions for its sustainable development. Objectives: to develop a methodology for determining priorities for planting to minimize the risks of damage to the environment and public health. Materials and methods: statistical and cartographic data, full-scale investigations of insolation regime and humidity characteristics, compositional city planning and technogenic nuances that cause the ecology of a million-industrial city (using an example of Volgograd). Research methods - statistical and cartographo-correlation analysis, geoinformation modeling, valuation technique for spread of pollution on the ground. Results: local and summary maps of atmospheric air pollution in Volgograd were built by industrial enterprises with the definition of the boundaries of pollution and the population under the influence; the zones of noise pollution and dispersion of carbon monoxide from motor vehicles (up to 180 m) were estimated, and as well as a higher content of heavy metals in soils near highways with a higher percentage of freight transport in the stream was detected; the oppressed state of the system of urban planting and below the normative provision of the population with plantations of common use were revealed. It has been established that sanitary protection zones do not have the proper density of green mass. Direct correlation between pollution levels and morbidity indicators, as well as inverse relationships between morbidity rates and the degree of planting are revealed. The author’s algorithm for calculating the requirement ratio for planting (KPO) is developed, which allows to assess the ecological picture of the analyzed territory, its potential for living / recreation of the citizens without the risk of causing direct harm or long-term health consequences, and the requirement for operational implementation environmental protection measures in the form of planting. Conclusions: 1) in Volgograd, foci of ecological disadvantage have clearly formed, under unfavorable weather conditions, at least 120,000 people will be exposed; 2) planting is in a depressed state, and the population’s supply of public green spaces is below the standard level by 2.5 times as a whole in the city and 3-4 times in some administrative districts; 3) the revealed correlation links testify to the negative impact of man-made impact factors and the compensation potential of the public access system of urban planting; 4) the developed author’s algorithm for calculating the requirement ratio for planting (KPO) allowed to carry out a comprehensive ecological zoning in Volgograd, to determine the priorities for environmental protection measures and from the ecological point of view to structure the concept of urban planting.