| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1878790 | Applied Radiation and Isotopes | 2013 | 5 Pages |
•We studied lake deposition records of radioactive Cs from Fukushima Dai-ichi NPP.•Sediment trap observations were performed before and after the FDNPP accident.•Precipitation and geomorphology of the catchment influence Cs discharge.•The contribution of FDNPP to the lake sediment decreased within a few months.•The major transport processes of FDNPP radioactive Cs to the lake have changed.
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 134,137Cs to the sediment decreased from 19–48% to 10–15% within a few months, implying that the major transport processes of FDNPP-derived 134,137Cs have changed from direct fallout to transport by soil particles.
