Impact of the 2019 typhoons on sediment source contributions and radiocesium concentrations in rivers draining the Fukushima radioactive plume, Japan
The Fukushima nuclear accident in March 2011 generated a 3000 km$^{2}$ plume of soils heavily contaminated with $^{137}$Cs. Decontamination was completed early in 2019. Typhoon Hagibis was the first extreme event that occurred in the region after decontamination. Its impact on sediment sources and s...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Académie des sciences
2020-12-01
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| Series: | Comptes Rendus. Géoscience |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.42/ |
| _version_ | 1797651337611051008 |
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| author | Evrard, Olivier Durand, Roxanne Nakao, Atsushi Patrick Laceby, J. Lefèvre, Irène Wakiyama, Yoshifumi Hayashi, Seiji Asanuma-Brice, Cécile Cerdan, Olivier |
| author_facet | Evrard, Olivier Durand, Roxanne Nakao, Atsushi Patrick Laceby, J. Lefèvre, Irène Wakiyama, Yoshifumi Hayashi, Seiji Asanuma-Brice, Cécile Cerdan, Olivier |
| author_sort | Evrard, Olivier |
| collection | DOAJ |
| description | The Fukushima nuclear accident in March 2011 generated a 3000 km$^{2}$ plume of soils heavily contaminated with $^{137}$Cs. Decontamination was completed early in 2019. Typhoon Hagibis was the first extreme event that occurred in the region after decontamination. Its impact on sediment sources and sediment $^{137}$Cs contamination was investigated through the application of a sediment fingerprinting procedure using spectrocolorimetry and geochemical properties. Sediment deposits ($n=24$) were collected in the Mano and Niida River catchments after the 2019 typhoons, and their signature was compared to that of potential sources (e.g., cropland, forests, and subsurface; $n=57$). Results demonstrate the dominance of cropland as the main source of sediment (mean: 54%) followed by forests (41%) with much lower contributions of subsurface material (5%). Overall, $^{137}$Cs concentrations in sediment were on average 84%–93% lower than the levels recorded after the accident in 2011, which demonstrates the effectiveness of cropland decontamination. |
| first_indexed | 2024-03-11T16:14:33Z |
| format | Article |
| id | doaj.art-bb6f8beafbed4a6cba852b04720f9007 |
| institution | Directory Open Access Journal |
| issn | 1778-7025 |
| language | English |
| last_indexed | 2024-03-11T16:14:33Z |
| publishDate | 2020-12-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Géoscience |
| spelling | doaj.art-bb6f8beafbed4a6cba852b04720f90072023-10-24T14:24:06ZengAcadémie des sciencesComptes Rendus. Géoscience1778-70252020-12-01352319921110.5802/crgeos.4210.5802/crgeos.42Impact of the 2019 typhoons on sediment source contributions and radiocesium concentrations in rivers draining the Fukushima radioactive plume, JapanEvrard, Olivier0Durand, Roxanne1Nakao, Atsushi2Patrick Laceby, J.3Lefèvre, Irène4Wakiyama, Yoshifumi5Hayashi, Seiji6Asanuma-Brice, Cécile7Cerdan, Olivier8Laboratoire des Sciences du Climat et de l’Environnement (LSCE/IPSL), Unité Mixte de Recherche 8212 (CEA/CNRS/UVSQ), Université Paris-Saclay, Gif-sur-Yvette, FranceLaboratoire des Sciences du Climat et de l’Environnement (LSCE/IPSL), Unité Mixte de Recherche 8212 (CEA/CNRS/UVSQ), Université Paris-Saclay, Gif-sur-Yvette, FranceGraduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, JapanAlberta Environment and Parks (AEP), Calgary, Alberta, CanadaLaboratoire des Sciences du Climat et de l’Environnement (LSCE/IPSL), Unité Mixte de Recherche 8212 (CEA/CNRS/UVSQ), Université Paris-Saclay, Gif-sur-Yvette, FranceInstitute of Environmental Radioactivity (IER), University of Fukushima, Fukushima, JapanNational Institute for Environmental Studies (NIES), Fukushima Branch, Miharu, JapanCNRS, IFRJ-UMIFRE 19 - MFJ, Tokyo, Japan; Center for Japanese Studies (CRJ-Centre de Recherche sur le Japon), UMR 8173 - EHESS, Paris, FranceBureau de Recherches Géologiques et Minières (BRGM), Orléans, FranceThe Fukushima nuclear accident in March 2011 generated a 3000 km$^{2}$ plume of soils heavily contaminated with $^{137}$Cs. Decontamination was completed early in 2019. Typhoon Hagibis was the first extreme event that occurred in the region after decontamination. Its impact on sediment sources and sediment $^{137}$Cs contamination was investigated through the application of a sediment fingerprinting procedure using spectrocolorimetry and geochemical properties. Sediment deposits ($n=24$) were collected in the Mano and Niida River catchments after the 2019 typhoons, and their signature was compared to that of potential sources (e.g., cropland, forests, and subsurface; $n=57$). Results demonstrate the dominance of cropland as the main source of sediment (mean: 54%) followed by forests (41%) with much lower contributions of subsurface material (5%). Overall, $^{137}$Cs concentrations in sediment were on average 84%–93% lower than the levels recorded after the accident in 2011, which demonstrates the effectiveness of cropland decontamination.https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.42/Source tracingSediment fingerprintingNuclear accidentCatchmentCesium-137 (<span class="mathjax-formula">$^{137}$</span>Cs) |
| spellingShingle | Evrard, Olivier Durand, Roxanne Nakao, Atsushi Patrick Laceby, J. Lefèvre, Irène Wakiyama, Yoshifumi Hayashi, Seiji Asanuma-Brice, Cécile Cerdan, Olivier Impact of the 2019 typhoons on sediment source contributions and radiocesium concentrations in rivers draining the Fukushima radioactive plume, Japan Comptes Rendus. Géoscience Source tracing Sediment fingerprinting Nuclear accident Catchment Cesium-137 (<span class="mathjax-formula">$^{137}$</span>Cs) |
| title | Impact of the 2019 typhoons on sediment source contributions and radiocesium concentrations in rivers draining the Fukushima radioactive plume, Japan |
| title_full | Impact of the 2019 typhoons on sediment source contributions and radiocesium concentrations in rivers draining the Fukushima radioactive plume, Japan |
| title_fullStr | Impact of the 2019 typhoons on sediment source contributions and radiocesium concentrations in rivers draining the Fukushima radioactive plume, Japan |
| title_full_unstemmed | Impact of the 2019 typhoons on sediment source contributions and radiocesium concentrations in rivers draining the Fukushima radioactive plume, Japan |
| title_short | Impact of the 2019 typhoons on sediment source contributions and radiocesium concentrations in rivers draining the Fukushima radioactive plume, Japan |
| title_sort | impact of the 2019 typhoons on sediment source contributions and radiocesium concentrations in rivers draining the fukushima radioactive plume japan |
| topic | Source tracing Sediment fingerprinting Nuclear accident Catchment Cesium-137 (<span class="mathjax-formula">$^{137}$</span>Cs) |
| url | https://comptes-rendus.academie-sciences.fr/geoscience/articles/10.5802/crgeos.42/ |
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