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タイトル: | Future projection of radiocesium flux to the ocean from the largest river impacted by Fukushima Daiichi Nuclear Power Plant. |
著者: | Adhiraga Pratama, Mochamad Yoneda, Minoru https://orcid.org/0000-0002-3599-0708 (unconfirmed) Shimada, Yoko https://orcid.org/0009-0007-0514-4539 (unconfirmed) Matsui, Yasuto Yamashiki, Yosuke |
著者名の別形: | 山敷, 庸亮 |
キーワード: | Marine chemistry Environmental monitoring |
発行日: | 12-Feb-2015 |
出版者: | Nature Publishing Group |
誌名: | Scientific reports |
巻: | 5 |
論文番号: | 8408 |
抄録: | Following the initial fall out from Fukushima Dai-ichi Nuclear Power Plant (FDNPP), a significant amount of radiocesium has been discharged from Abukuma River into the Pacific Ocean. This study attempted to numerically simulate the flux of radiocesium into Abukuma River by developing the multiple compartment model which incorporate the transport process of the radionuclide from the ground surface of the catchment area into the river, a process called wash off. The results from the model show that the sub-basins with a high percentage of forest area release the radionuclides at lower rate compared to the other sub-basins. In addition the results show that the model could predict the seasonal pattern of the observed data. Despite the overestimation observed between the modeled data and the observed data, the values of R(2) obtained from (137)Cs and (134)Cs of 0.98 and 0.97 respectively demonstrate the accuracy of the model. Prediction of the discharge from the basin area for 100 years after the accident shows that, the flux of radiocesium into the Pacific Ocean is still relatively high with an order of magnitude of 10(9) bq.month(-1) while the total accumulation of the discharge is 111 TBq for (137)Cs and 44 TBq for (134)Cs. |
著作権等: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
URI: | http://hdl.handle.net/2433/196034 |
DOI(出版社版): | 10.1038/srep08408 |
PubMed ID: | 25673214 |
出現コレクション: | 学術雑誌掲載論文等 |
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