Migration of Radiocaesium with Litterfall in Hardwood-Japanese Red Pine Mixed Forest and Sugi Plantation

• Hisadome Keigo

  Faculty of Life and Environmental Sciences, University of Tsukuba Asia Air Survey Co., Ltd.

• Onda Yuichi

  Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba

• Kawamori Ayumi

  Graduate School of Life and Environmental Sciences, University of Tsukuba

• Kato Hiroaki

  Center for Research in Isotopes and Environmental Dynamics, University of Tsukuba

Bibliographic Information

Other Title

• 落葉広葉樹-アカマツ混交林およびスギ人工林における落葉に伴う放射性セシウムの移行
• オチバ コウヨウジュ-アカマツ コンコウリン オヨビ スギ ジンコウリン ニ オケル オチバ ニ トモナウ ホウシャセイ セシウム ノ イコウ
• Isotopic Compositions of ²³⁶U and Pu Isotopes in “Black Substances” Collected from Roadsides in Fukushima Prefecture: Fallout from the Fukushima Dai-ichi Nuclear Power Plant Accident
• Isotopic compositions of 236U and Pu isotopes in “black substances” collected from roadsides in Fukushima Prefecture: fallout from the Fukushima Dai-ichi Nuclear Power Plant accident

Abstract

To clarify radiocaesium migration with litterfall from the tree canopy to the forest floor, a study was conducted in the three different forests in Fukushima Prefecture where radionuclides released from the Fukushima Daiichi Nuclear Power Plant (FDNPP) were deposited. Concentrations of ¹³⁴Cs and ¹³⁷Cs in the litterfall had been periodically monitored for 11 months since four months after the accident and were analyzed. The concentrations in the litter samples were generally higher in the cedar forests than those in the hardwood-Japanese red pine mixed forest; because the hardwood trees had no leaves at the time of the accident, most of the resuspended radiocaesium is considered to have been deposited on the forest floor through canopies. Meanwhile, the cumulative deposition of radiocaesium in the cedar forests was found to be higher than that in the hardwood-Japanese red pine mixed forest. This confirmed that large amount of radiocaesium still remains in the tree canopies. Although not many differences were observed in the radiocaesium concentrations in the litterfall since October 2011 in any forest stand, radiocaesium deposition remarkably increased due to a large amount of litterfall from the canopies. Together with the litterfall, vertical distribution of fresh leaves in the canopies, horizontal distribution of litter on the forest floor, throughfall, and stemflow should be monitored to clarify the comprehensive migration of radiocaesium in the future.

Journal

• Journal of the Japanese Forest Society

  Journal of the Japanese Forest Society 95 (5), 267-274, 2013

  THE JAPANESE FORESTRY SOCIETY

Keywords

• litter
• radiocaesium
• migration
• deposition
• Fukushima Dai-ichi Nuclear Power Plant accident

Details

• CRID: 1390282680206666880
• NII Article ID: 130003384703
• NII Book ID: AA12003078
• DOI: 10.4005/jjfs.95.267
• DOI: 10.1021/es405294s
• ISSN: 1882398X
• ISSN: 15205851
• ISSN: 13498509
• ISSN: 0013936X
• NDL BIB ID: 024970255
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010870373
• Web Site: http://id.ndl.go.jp/bib/024970255
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024970255
• Web Site: https://www.jstage.jst.go.jp/article/jjfs/95/5/95_267/_pdf
• Web Site: https://pubs.acs.org/doi/pdf/10.1021/es405294s
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed