title: Accumulation of accident-derived radiocesium in lake and coastal sediments at 300-700 km distance from Fukushima area.
abstract: The accumulation of accident-derived radiocesium was investigated in nine water bodies located 300-700 km from the Fukushima Dai-ichi Nuclear Power Plant (FDNPP). (134)Cs from the accident was detected in surface sediment of five water bodies. The (134)Cs concentration, corrected to the time of the accident in 2011, was generally lower than that of (137)Cs, and its spatial pattern does not fully correspond to that of (137)Cs. These results suggest that radiocesium derived from both FDNPP and past global fallout can be separately observed and that the contributions of both sources are non-uniform within these sites. The (134)Cs inventory in surface sediments is smaller than its deposition, suggesting that almost all deposited (134)Cs remains within the catchment and/or a part has been discharged from the saline and brackish water bodies.
authors.affiliation: Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24, Wake, Nomi, Ishikawa 923-1224, Japan sochiai@ies.or.jp.
authors.forename: S
authors.initials: S
authors.lastname: Ochiai
authors.affiliation: Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24, Wake, Nomi, Ishikawa 923-1224, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Miyata
authors.affiliation: Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24, Wake, Nomi, Ishikawa 923-1224, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Nagao
authors.affiliation: Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24, Wake, Nomi, Ishikawa 923-1224, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yamamoto
authors.affiliation: Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24, Wake, Nomi, Ishikawa 923-1224, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Murakami
authors.affiliation: Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24, Wake, Nomi, Ishikawa 923-1224, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Nishimura
authors.affiliation: Institute of Nature and Environmental Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Itono
authors.affiliation: Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24, Wake, Nomi, Ishikawa 923-1224, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Suzuki
authors.affiliation: Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Hamataka
authors.affiliation: Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kawano
authors.affiliation: Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24, Wake, Nomi, Ishikawa 923-1224, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Hamajima
authors.affiliation: Institute of Nature and Environmental Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kashiwaya
mesh_terms: D002588:Cesium Radioisotopes / Q000032:analysis*; D062406:Fukushima Nuclear Accident; D019015:Geologic Sediments / Q000032:analysis / Q000737:chemistry*; D060106:Lakes / Q000032:analysis / Q000737:chemistry*; D011847:Radioactive Fallout / Q000032:analysis*; D000068357:Saline Waters / Q000737:chemistry; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D002588:Cesium Radioisotopes; D011847:Radioactive Fallout; D014875:Water Pollutants, Radioactive