Tyshchenko Y. Regularity of Radionuclides Biogeochemical Migration in the Forest Ecosystems of the Ukrainian Polissya

3)The dependence of biogeochemical processes intensity on complex impact of water-physical and trophic peculiarities for soil and biocoenosis types has been established. The last two (soil and biocoenosis types) can be determined by forest-typological classification. Schematization of edaphic parameters for the forestlands by radionuclides disposition towards biogeochemical processes has been carried out. The method of prognosis for dynamic of 137Cs gross content in soil and wood for the forest ecosystems has been developed and prognosis assessment under polygon conditions has been carried out. Radionuclides distribution in the structural complexes of contaminated wood of different types was established. Technological parameters for processing ways of ratioactive contaminated wood allowed to obtain ecologically pure product were grounded. Perspective ways for optimization of forest use on radioactive contaminated forestlands were proposed.