Applications of radiocesium migration models to Fukushima environmental issues, 1; Overview

Kurikami, Hiroshi  ; Sakuma, Kazuyuki   ; Malins, A.  ; Yamada, Susumu  ; Machida, Masahiko  

Over recent years after the accident at the Fukushima Dai-ichi Nuclear Power Plant, we have developed and applied several numerical models covering various time- and spatial-scales to tackle environmental issues in Fukushima. Each issue requires selection of a suitable model. The issues we have tackled thus far include medium- to long-term prediction of the redistribution of radiocesium and changes of radiation dose rates in the air, estimation of discharge amounts of radiocesium from land to the ocean, understanding the behavior of radiocesium in rivers and lakes during heavy rainfall events, and evaluation of the effect of radocesium migration in the environment on forestry and fishery products. In this presentation, we give an overview of our modeling studies on environmental issues in Fukushima.