日本西部湖泊沉积物中来自福岛第一核电站事故的放射性铯的沉积记录。
Deposition records in lake sediments in western Japan of radioactive Cs from the Fukushima Dai-ichi nuclear power plant accident.
作者信息
Ochiai Shinya, Nagao Seiya, Yamamoto Masayoshi, Itono Taeko, Kashiwaya Kenji, Fukui Kotaro, Iida Hajime
机构信息
Low Level Radioactivity Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, O 24 Wake, Nomi, Ishikawa 923-1224, Japan.
出版信息
Appl Radiat Isot. 2013 Nov;81:366-70. doi: 10.1016/j.apradiso.2013.03.073. Epub 2013 Mar 26.
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.
对日本西部湖泊在福岛第一核电站事故前后进行的沉积物捕获器观测表明，放射性铯排放的变化受各集水区降水量波动和地貌条件的影响。福岛第一核电站产生的（134,137）铯对沉积物的贡献在几个月内从19% - 48%降至10% - 15%，这意味着福岛第一核电站产生的（134,137）铯的主要迁移过程已从直接沉降转变为通过土壤颗粒迁移。
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