title: Mathematical modeling of radionuclide dispersion in the Pripyat-Dnieper aquatic system after the Chernobyl accident.
abstract: The Chernobyl accident heavily contaminated the largest aquatic system in the Ukraine, requiring the development of a model-based decision support system in the field of aquatic radioecology. The main objectives of the system were to simulate and predict radionuclide dispersion in the Pripyat-Dnieper River-reservoir system, assess the effectiveness of special hydraulic countermeasures designed to decrease the rate of radionuclide dispersion in the water bodies, and support the Dnieper reservoirs' management operations. A hierarchy of mathematical models was developed. A two-dimensional (2-D) vertical-longitudinal model, a 2-D lateral-longitudinal model, a one-dimensional (1-D) channel model and a box-type model are briefly presented. These models describe the main features of radionuclide dispersion, including the processes governing radionuclide-sediment interactions. Examples of the models' applications are presented to show the peculiarities of radionuclide dispersion in this aquatic system.
authors.affiliation: Department of Mathematical Modeling of Water Systems, V. Glushkov Institute of Cybernetics, Kiev, Ukraine.
authors.forename: M J
authors.initials: MJ
authors.lastname: Zheleznyak
authors.forename: R I
authors.initials: RI
authors.lastname: Demchenko
authors.forename: S L
authors.initials: SL
authors.lastname: Khursin
authors.forename: Y I
authors.initials: YI
authors.lastname: Kuzmenko
authors.forename: P V
authors.initials: PV
authors.lastname: Tkalich
authors.forename: N Y
authors.initials: NY
authors.lastname: Vitiuk
mesh_terms: D000059:Accidents; D005618:Fresh Water; D008433:Mathematics; D008962:Models, Theoretical; D009688:Nuclear Reactors; D011847:Radioactive Fallout; D014455:Ukraine; D014878:Water Pollution, Radioactive; D014881:Water Supply
chemical_list: D011847:Radioactive Fallout