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[1J08] Anthropogenic impacts on temporal decrease in air dose rate in urban areas
(1) Series overview and environmental restoration trends obtained from field observations
Keywords:Fukushima-Daiichi Nuclear Power Plant accident, Urban area, Air dose rate, Cs-137 deposition amount, Human activities
Air dose rates in urban areas decrease faster in residential areas than in evacuation zones, suggesting that human activities facilitate the reduction. However, human activities include various factors such as decontamination and road wear caused by traffic. Therefore, it is difficult to evaluate the effect of human activities by conventional analysis using monitoring data, except for the effect of decontamination. This study aims to evaluate the effects of human activities on the reduction. This study has been analyzed using air dose rate monitoring data obtained over a wide area with long-term monitoring, in addition to the field observation and simulation evaluations. In this presentation, an overview of this study and the results of field observations are present.
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