A STUDY ON MODELING OF CS AND SR VERTICAL TRANSFER IN FOREST SOIL

Abstract

 Radioactive Cs and Sr 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 soils based on the results of field and laboratory experiments on Cs and Sr soil distribution and elution from soil. We assume that Cs and Sr vertically transferred in forest soils depending on mechanical behavior of porewater in forest soils. The calculated values are compared with the measured data. It was found that the calculated values agree in general with the observed data.