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Springer Geology

ISSN:21979545

2023

10.1007/978-981-99-6575-5_7

URDIUZ

The work is devoted to the identification of the initial Cs140 concentration field in the Black Sea after the Chernobyl accident from contact measurement data. The assimilation procedure is based on an estimation method based on the method of adjoint equations. As input parameters for the transport-diffusion model, the values of current velocities obtained using a MGI circulation model of the Black Sea are used. The horizontal step is 1.6 km, and the wind stress is set according to SKIRON data. The method of adjoint equations is used to find fallout zones. The contact measurement data used were obtained on the 33rd flight of the NIS “Akademik Vernadsky” in June-July 1986. The results are compared with data from the National Centers for Environmental Prediction (NCEP) on the wind situation and precipitation intensity and information from the IRSN (Institute for Nuclear and Radiation Safety of France) on the dynamics of radioactive contamination from the Chernobyl nuclear power plant. © The Author(s).

Adjoint problem, Cs140 concentration, Identification of pollution sources, Impurity transfer, Numerical modeling, Radioactive contamination

2024-02-05 14:59:35