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Information × Registration Number 0224U001192, 0119U001433 , R & D reports Title Development of a complex of mathematical models for hydrometeorological research and information systems for the analysis and forecasting of the environment in conditions of climate change popup.stage_title Head Registration Date 18-01-2024 Organization Institute of Mathematical Machines and System Problems NAS Ukraine. popup.description2 In the course of the work, mathematical models of the spread of pollution in the atmospheric environment and surface waters, the environment were improved, and the dynamics of pollution in selected individual scenarios were investigated: 1. A mathematical model of secondary pollution of the atmospheric environment as a result of wind uplift of radionuclides from radioactively contaminated territories has been developed; 2. The formation of secondary radioactive pollution of the atmospheric environment of Ukraine as a result of the dust storm of April 16, 2020 was investigated; it is shown that the wind uplift of radionuclides, primarily from the territory of the Chernobyl Exclusion Zone (CHEZ), led to an increase in the concentrations of cesium-137 in points hundreds of kilometers away from the CHZ by 3-5 times compared to the background values, which is several orders of magnitude less than the permissible normative values 3. Assessments of the cross-border impact of the new power units 3 and 4 of the Khmelnytskyi NPP, which are under construction due to a possible radiation accident with the release of radionuclides into the atmosphere, were carried out. For the territories of Belarus, Poland, Slovakia, Hungary, Romania, and Moldova, distributions of the conditional probability of exceeding the given effective potential dose from all paths in the event of an accident and spread on the territory of the respective countries were constructed. It is shown that the absolute probability of exceeding the effective dose of 1 mSv in the territory of at least one of the listed countries does not exceed once per million years. 4. An algorithm for the correction of flows in implicit difference schemes for the numerical solution of the convective diffusion equation in pollution propagation models has been developed, which allows increasing the order of approximation of the corresponding numerical schemes. 5. New numerical Eulerian and Lagrangian methods for modeling the trans  Product Description popup.authors Bejenar Roman Vasylovych Brovchenko Igor Oleksandrovich Dontsov-Zagreba Timofey Oleksiyovych Kivva Sergey Leonidovych Kovalets Ivan Vasylovych Kovalets Kateryna Ivaniva Maderich Volodymyr Stanislavovych Maystrenko Svetlana Yakovna Nochvay Volodymyr Ivanovych Polonsky Oleksandr Oleksandrovich Sinkevich Roman Oleksandrovich Sorokin Mykhailo Vasylovych Udovenko Lyudmila Fedorivna Udovenko Oleg Ivanovych Khalchenkov Oleksandr Volodymyrovych Khurtsilava Konstantin Viktorovich popup.nrat_date 2024-01-18 Close