UMB 2: Modeling Fate of Radioactive Elements at The Sediment Water Interface in Different Redox Conditions

E. Yakushev, A. Straalstrøm (NIVA).

Objective: The aim of this work was to simulate fluxes of radioactive elements at the sediment-water interface and their variability connected with redox conditions changes.

Results: Numerical modelling approaches were applied and the following results obtained:

  • bottom water is enriched with 137Cs during anoxia, and it transports to surface water during winter mixing.
  • synthesis of organic matter and its sinking to the bottom serve as a biological pump for radionuclides .
  • there should be a seasonality in 137Cs concentrations in the water in addition to physical decay. 


Conclusion: This modelling tool can be used for simulating of radionuclide fate in the sediment-water environment, and the work has been published in a scientific paper. Work is in progress on coupling with INCA model and ROMS aiming to simulate processes in the estuarine/fjord environment.

Project Manager: Evgeniy Yakushev

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Simulated seasonal variability in the water column and at sediment-water interface. (Figure: E. Yakushev, NIVA).

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Simulated seasonal variability in the water column and at sediment-water interface. (Figure: E. Yakushev, NIVA).

Sist oppdatert 04.05.2016