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Information × Registration Number 0220U101173, 0117U002535 , R & D reports Title Experimental study and estimation of biogenic flows of 90Sr in forest ecosystems popup.stage_title Head Holiaka Dmytriі M., Кандидат сільськогосподарських наук Registration Date 04-01-2020 Organization National University of Life and Environmental Sciences of Ukraine popup.description2  Object of study - 90Sr content in contaminated forest ecosystems. Subject of study - 90Sr biogenic flows in forest ecosystem components. During scientific-research work, the output data observations from pine and birch plots (2016-2019) are obtained: concentrations and stocks of radionuclide in the investigated depots and flows of organic matter, and other parameters. These results used for created and parameterization of the equation system of 90Sr flows between forest compartments in the isotope recycling imitation models based on minimizing the sum of squared deviations of the objective function by stochastic gradient descent method. The dynamics of redistribution of 90Sr activity in forest biogeocenosis components have been estimated. The possibility of depositing more than half of 90Sr activity of pine biogeocenosis in biomass components has been established. Time series of the radionuclide aggregate transform factors from the soil to the trunk elements are predicted. The prospect of using a commercial unmanned aerial vehicle and specialized software for 3D modelling of the crown surface by stereo-photogrammetric method for the purpose of estimation of biomass stocks and their growths, as well as for prediction of biological mobile radionuclides accumulation in forest components is confirmed Product Description popup.authors Bilous Andrii M. Holiaka Maryna V. Diachuk Petro P. Zadorozhniuk Roman M. Yoshchenko Liudmyla V. Kаshpаrov Vаlerii O. Kovbasa Yaroslav V. Koren Volodymyr A. Levchuk Sviatoslav Ye. Malostan Igor M. Morozova Valeriia S. Оtreshko Liudmyla M. Pavliuchenko Valentyna V. Protsak Valentyn P. popup.nrat_date 2020-04-02 Close