*Yoshifumi Wakiyama¹, Ryo Manome², Yuichi Onda³, Kazuya Yoshimura⁴ (1.Institute of Environmental Radioacitivity, Fukushima Universiy, 2.Graduate School of Life and Envionmental Sciences, University of Tsukuba, 3.Center for Researchs in Isotopes and Enivironmental Dynamics, University of Tsukuba, 4.Sector of Fukushima Research adn Development, Japan Atomic Energy Agency)

*Yuichi Onda¹, Keisuke Taniguchi², Kazuya Yoshimura³, Yoshifumi Wakiyama⁴ (1.Center for Research on Isotopes and Environmental Dynamics, University of Tsukuba, 2.Centre for Environmental Creation, Fukushima Prefecture, 3.Japan Atomic Energy Agency, 4.Insititute of Environmental Radioactivity, Fukushima University)