[3J14-17] FDNPP Accident: Environmental Transfer

[3J17] Mapping project in Fukushima and related researches

(14)Declining trend of dissolved cesium-137 of stream water at small forested catchment

*Sho Iwagami¹, Yuichi Onda¹, Maki Tsujimura², Kouichi Sakakibara², Yuutarou Satou² (1.Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba, 2.Department of Sustainable Environmental Studies, Graduate School of Life and Environmental Sciences, University of Tsukuba)

Keywords:Dissolved cesium-137 concentration, Forested small catchment, Stream water

福島県伊達郡川俣町山木屋地区の森林小流域において、渓流水の溶存態セシウム137濃度のモニタリングを行ってきた．どの流域においても２重指数関数的な逓減傾向を示しているが、事故後５年経ち、流域間の違いが見られてきた。