Analysis of Future ¹³⁷Cs Forest Soil Contamination Using Dynamic Model for Evaluating ¹³⁷Cs Distribution in Forest After the Fukushima Nuclear Accident

Abstract

 ¹³⁷Cs released from the Fukushima Daiichi Nuclear Power Plant accident in March 2011 has diffused over wide forest areas and will produce a long-term contamination in the forest ecosystem in Fukushima region. In this study, we developed a model for evaluating vertical distributions in coniferous and deciduous forest soil based on the reported model for estimating ¹³⁷Cs in forest areas after the Chernobyl accident. The model was examined with the monitoring data. The future effect of the forest remediation at this point in time was predicted using the model that the remediation of organic layer and 0-2cm surface soil in coniferous forest would have more effect and the recontamination after remediation would reduce the effect in deciduous forest.