STUDY OF RIVER INFLOW LOAD OF CESIUM TO TOKYO BAY USING NUMERICAL MODEL

Abstract

 The object of this study is to predict the distribution of cesium deposited on the bottom of Tokyo Bay by means of the Hybrid Box Model linked with a diffusion model, released by Fukushima Daiichi Nuclear Power Plant. On the basis of the load fluxes from rivers, the distribution of concentration (separately for dis-solved cesium and small and large particulate cesium) in seawater and the mass of cesium sedimentation to the bottom of the bay were calculated by the models. Results were compared to the published observation data in order to examine applicability of the used models. Estimated cesium concentrations in the sediment show good agreement with the observed data.