Buc Yu. V.

Theoretical study to determine the factors that influence emergencies natural disasters caused by fire in the environment. An improved classification of forest fire risks and identified key priorities for further research to develop a methodology for assessing of forest fire risks.

Theoretical researches about the role of fire factor in forming, functioning, stability and dynamics of geosystems are presented. Analysis of common modern scientific concepts in relation to renewal of natural complexes is conducted. A concept «fire relaxation geosystems» and his correlations with other processes of researches after fire influence is considered. Present results in relation to the consequences of influence of fire factor on an environment require generalization, with the purpose of exposure of conformities to the law of renewal and renewal of geosystems after the consequences of influence caused fires depending on a geographical zonality, landscape structured and individual features of geosystems.

The problem of fires in natural ecosystems is presented. Generalization is conducted and classification of mathematical models that has deal with and distribution of landscape firesis resulted . Mathematical models that were created domestic scientists in the last few years are analysed. It is found out that scientific researches are related to the mathematical design of fires in natural ecosystem and have the mainly applied value, and were directed on providing of fire safety of the forests and liquidation of landscape fires.

Districting of the Kharkiv area is presented after a possible ecological risk from the origin of emergencies on the objects of the increased danger. The map of level of danger of ecological threat is created in the districts of area and they are conducted ranking. The closeness of placing of potential sources of technogenic hazard is appraised for all districts of area which gives a right with the reliable fate of convention to talk about the measure of technogenic danger of territory of investigational districts of the Kharkiv region.