METHODOLOGY FOR THE ECOLOGICAL ENVIRONMENTAL IMPACT ASSESSMENT OF THE FOREST FIRE CONSEQUENCES UNDER COMPLEX RADIATION CONDITIONS OF FIRE LOAD

Abstract

In the paper, the methodology for the ecological environmental impact assessment of the forest fire consequences under complex radiation conditions of fire load has been proposed on the basis of the scientific researches of leading experts in the field of forest fires simulation, such as Abramov Yu. O., Komyak V. O., Kutsenko L. M., Lytvyn N. V., Pokrovsky R. L., Tarasenko O. A., Vasyliev S. V., Soznik O. P. The analysis determines that the stochastic nature of the processes of forest fires occurrence, development, extension and variation of the degree of vegetation burning in the forest areas depend on the fire load, season of the year and other fire-technical and meteorological factors, which in turn are complicated by the content of radionuclides with different activity times. The information base of this technique is a model where forest is considered as a single-layer two-phase medium consisting of air and gaseous pyrolysis products during combustion of forest combustible materials and their solid pyrolysis products. While constructing a physical-mathematical model of a two-phase heterogeneous mixture the methods of solid-state mechanics was used, which made it possible to present the fire load as a two-component continuum with interpenetrating phase motion and interphase mass, momentum, and energy exchange. During the research, the adequacy of the proposed methodological apparatus was checked and the main directions of its further application as a basis for solving the problems of forecasting the negative environmental impact on the environment were determined. The practical significance of the obtained results is the possibility of their use for complex ecological audits of the territory which is subject to the secondary radiation influence both inside and outside the exclusion zone of the Chornobyl NPP.