title: Deposition records in lake sediments in western Japan of radioactive Cs from the Fukushima Dai-ichi nuclear power plant accident.
abstract: Sediment trap observations of lakes in western Japan before and after Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident indicate that changes in the radioactive Cs discharge are influenced by fluctuations in precipitation and geomorphological conditions in each catchment. Contributions of FDNPP-derived (134,137)Cs to the sediment decreased from 19-48% to 10-15% within a few months, implying that the major transport processes of FDNPP-derived (134,137)Cs have changed from direct fallout to transport by soil particles.
authors.affiliation: Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24 Wake, Nomi, Ishikawa 923-1224, Japan. sochiai@llrl.ku-unet.ocn.ne.jp
authors.forename: Shinya
authors.initials: S
authors.lastname: Ochiai
authors.forename: Seiya
authors.initials: S
authors.lastname: Nagao
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Yamamoto
authors.forename: Taeko
authors.initials: T
authors.lastname: Itono
authors.forename: Kenji
authors.initials: K
authors.lastname: Kashiwaya
authors.forename: Kotaro
authors.initials: K
authors.lastname: Fukui
authors.forename: Hajime
authors.initials: H
authors.lastname: Iida
mesh_terms: D002588:Cesium Radioisotopes / Q000032:analysis*; D062406:Fukushima Nuclear Accident; D019015:Geologic Sediments / Q000032:analysis* / Q000737:chemistry; D007564:Japan; D060106:Lakes / Q000032:analysis* / Q000737:chemistry; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D011847:Radioactive Fallout / Q000032:analysis*; D014875:Water Pollutants, Radioactive / Q000032:analysis*
chemical_list: D002588:Cesium Radioisotopes; D011847:Radioactive Fallout; D014875:Water Pollutants, Radioactive
keywords: Fukushima Dai-ichi NPP; Lake sediment; Radioactive Cs; Sediment trap