[M-AG38] 福島原発事故から10年：放射性核種の環境動態

[MAG38-05] 福島原発事故から10年間の森林における放射性セシウムの移行と分布

*加藤 弘亮¹、恩田 裕一¹、サイディン ズル ヒルミ¹、飯田 光¹、赤岩 哲¹、篠塚 友輝¹ (1.筑波大学アイソトープ環境動態研究センター)

キーワード：福島原発事故、森林、放射性セシウム

In Japan's forests, field data on the distribution and migration of radiocesium deposited by the Fukushima Daiichi Nuclear Power Plant accident, from the initial dynamics to the distribution in the forest over ten years, have been vigorously collected. The results have been published in an IAEA technical report (IAEA- TECDOC-1927, 2020) as a database of migration parameters to be compiled by an international project (MODARIA II: Modelling and Data for Radiological Impact Assessments) promoted by the International Atomic Energy Agency (IAEA). Radiocesium's transfer mechanisms in the forest by hydrological processes and the runoff through the water system were summarized based on investigations in experimental forests and watersheds in Fukushima Prefecture. Besides, we outlined the missing links that need to be clarified by re-analysis of existing data and additional experiments based on previous studies on Fukushima and Chernobyl. Finally, we discussed the direction of future monitoring surveys.