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Development of prediction model for ambient dose rate based on the analysis of radiocesium dynamics in forest environment

Research Project

Project/Area Number 16K16201
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Environmental impact assessment
Research InstitutionUniversity of Tsukuba

Principal Investigator

Kato Hiroaki  筑波大学, 生命環境系, 准教授 (90732636)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords福島第一原子力発電所事故 / 林内空間線量率 / 放射性セシウム / 移行状況 / 樹種 / 森林 / 空間線量率 / 原発事故 / 将来予測
Outline of Final Research Achievements

In order to clarify the influence of the distribution and transfer of radiocesium in the forest on the fluctuation of air dose rate in the forest, radiocesium redistribution in association with rainwater and litterfall was monitored in the forest in Kawamata and Namie, Fukushima Prefecture. We developed double exponential model which simulate vertical distribution of radiocesium in forest. Furthermore, we analyzed huge dataset of air dose rate which was measured in the experimental forests and by regional monitoring campaign by local governments and related ministries in the wide area forest in Fukushima prefecture, the influence of tree species on temporal trend of the air dose rate was clarified. In addition, we developed a method to correct the variation of the measured air dose rate based on variation of moisture content at the forest floor and using the advance rainfall index.

Academic Significance and Societal Importance of the Research Achievements

森林では大気からの初期沈着から放射性セシウムの分布が時間経過とともに変化してゆく。そのため、福島原発事故の環境影響の解明と被ばく線量評価のためには、森林域の空間線量率の変化傾向と変動要因を解明することが長期的な線量予測に不可欠である。本研究では、樹種毎の林内の放射性セシウムの移行状況とあわせて相補的に解析することにより、樹種毎の林内空間線量率の時間変化傾向及び樹種間の差異の発生要因を明らかにした。以上の研究成果は、森林の空間線量率の長期予測と被ばく評価に資するのみならず、福島事故由来の放射性核種をトレーサーとした林内物質循環の理解の深化に貢献する科学的知見を提供しうる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (29 results)

All 2019 2018 2017 2016 2015 Other

All Int'l Joint Research (2 results) Journal Article (10 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 10 results,  Open Access: 3 results) Presentation (15 results) (of which Int'l Joint Research: 4 results) Remarks (2 results)

  • [Int'l Joint Research] Department of Soil and Water/Experimental Station of Aula Dei/EEAD-CSIC(スペイン)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] University of Glasgow(英国)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Six-year monitoring study of radiocesium transfer in forest environments following the Fukushima Nuclear Power Plant accident2018

    • Author(s)
      Kato, H., Onda, Y., Saidin, Z.H., Sakashita, W., Hisadome, K., Loffredo, N.
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: in press Pages: 1-13

    • DOI

      10.1016/j.jenvrad.2018.09.015

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Temporal changes of the ambient dose rate in the forest environments of Fukushima Prefecture following the Fukushima reactor accident2018

    • Author(s)
      Kato, H., Onda, Y., Yamaguchi, T.
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: 193-194 Pages: 20-26

    • DOI

      10.1016/j.jenvrad.2018.08.009

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Radiocesium concentrations in soil and leaf after decontamination practices in a forest plantation highly polluted by the Fukushima accident2018

    • Author(s)
      Lopez-Vicente Manuel、Onda Yuichi、Takahashi Junko、Kato Hiroaki、Chayama Shinya、Hisadome Keigo
    • Journal Title

      Environmental Pollution

      Volume: 239 Pages: 448-456

    • DOI

      10.1016/j.envpol.2018.04.045

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Radiocesium migration in the litter layer of different forest types in Fukushima, Japan2018

    • Author(s)
      Kurihara, M., Onda, Y., Kato, H., Loffredo, N., Yasutaka, T., Coppin, F
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: 187 Pages: 81-89

    • DOI

      10.1016/j.jenvrad.2018.01.027

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Determining the initial Fukushima reactor accident-derived cesium-137 fallout in forested areas of municipalities in Fukushima Prefecture2018

    • Author(s)
      Kato, H., Onda, Y.
    • Journal Title

      Journal of Forest Research

      Volume: in press Issue: 2 Pages: 1-12

    • DOI

      10.1080/13416979.2018.1448566

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spatial pattern of atmospherically deposited radiocesium on the forest floor in the early phase of the Fukushima Daiichi Nuclear Power Plant accident2017

    • Author(s)
      Kato, H., Onda, Y., Wakahara, T., Kawamori, A.
    • Journal Title

      Science of the Total Environment

      Volume: 615 Pages: 187-196

    • DOI

      10.1016/j.scitotenv.2017.09.212

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evaluation of forest decontamination using radiometric measurements2016

    • Author(s)
      Cresswell, A. J., Kato, H., Onda, Y., Nanba, K.
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: 164 Pages: 133-144

    • DOI

      10.1016/j.jenvrad.2016.07.027

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Suspended-sediment responses after strip thinning in headwater catchments2016

    • Author(s)
      Nam, S., Hiraoka, M., Gomi, T., Dung, B. X., Onda, Y., Kato, H.
    • Journal Title

      Landscape and Ecological Engineering

      Volume: 12 Issue: 2 Pages: 1-12

    • DOI

      10.1007/s11355-015-0284-0

    • NAID

      40020881585

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Small scale temporal distribution of radiocesium in undisturbed coniferous forest soil: Radiocesium depth distribution profiles2016

    • Author(s)
      Mengistu T. Teramage, Onda, Y., Kato, H.
    • Journal Title

      Journal of Environmental Management

      Volume: 170 Pages: 97-104

    • DOI

      10.1016/j.jenvman.2016.01.014

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Temporal changes in radiocesium deposition in various forest stands following the Fukushima Dai-ichi Nuclear Power Plant accident.2015

    • Author(s)
      Kato, H., Onda, Y., Loffredo, N., Hisadome, K., Kawamori, A.
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: in press Pages: 1-9

    • DOI

      10.1016/j.jenvrad.2015.04.016

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 福島原発事故から8年後の森林の放射能汚染状況2019

    • Author(s)
      加藤弘亮, 恩田裕一, Saidin Zul Hilmi, 篠塚友輝, 赤岩哲, 栗原モモ, 新里忠史
    • Organizer
      第130回日本森林学会大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 樹冠遮断が樹冠通過雨の放射性セシウムおよび溶存物質濃度に及ぼす影響2019

    • Author(s)
      篠塚友輝, 加藤弘亮, 赤岩哲, 栗原モモ, 恩田裕一
    • Organizer
      第130回日本森林学会大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 高沈着量の森林流域における溶存態放射性セシウムの供給源・流出経路の推定2019

    • Author(s)
      赤岩 哲, 加藤弘亮, 篠塚友輝, 栗原モモ, 恩田裕一
    • Organizer
      第130回日本森林学会大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 福島における放射性物質の分布状況調査 (9)福島県の森林における樹冠通過雨及び樹幹流の放射性セシウム濃度の変化要因2018

    • Author(s)
      加藤弘亮,恩田裕一,Zul Hilmi Saidin
    • Organizer
      日本原子力学会2018年秋の大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 福島原子力発電所事故から7年間の森林環境中の放射性セシウム移行状況2018

    • Author(s)
      加藤弘亮,恩田裕一,Zul Hilmi Saidin
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Seven-year monitoring study of radiocesium transfer in forest environments following the Fukushima Nuclear Power Plant accident2018

    • Author(s)
      Hiroaki KATO, Yuichi Onda, Zul Hilmi Saidin, 2018
    • Organizer
      European Geoscience Union (EGU) General Assembly 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 福島県の森林における放射性セシウムの移行と林内空間線量率の時間変化傾向2017

    • Author(s)
      加藤弘亮、恩田裕一
    • Organizer
      第128回日本森林学会大会
    • Place of Presentation
      鹿児島大学(鹿児島県・鹿児島市)
    • Year and Date
      2017-03-27
    • Related Report
      2016 Research-status Report
  • [Presentation] 福島における放射性物質の分布状況調査(8)福島第一原発事故から6年間の森林環境における放射性セシウムの移行状況2017

    • Author(s)
      加藤弘亮,恩田裕一,Zul Hilmi Saidin,山口敏朗
    • Organizer
      日本原子力学会2017年秋の大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Six-year monitoring study of radio-Cs transfer in forest environments following the Fukushima NPP accident2017

    • Author(s)
      Hiroaki KATO, Yuichi ONDA
    • Organizer
      MODARIA II Working Group 4 - Fukushima Parameter subgroup, Minutes of the first subgroup interim meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Reconstruction of fallout map of the Fukushima accident-derived radiocesium for environmental transfer studies2017

    • Author(s)
      Hiroaki KATO, Yuichi ONDA
    • Organizer
      MODARIA II Working Group 4 - Fukushima Parameter subgroup, Minutes of the first subgroup interim meeting
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 福島県の森林における放射性セシウムの移行と林内空間線量率の時間変化傾向2017

    • Author(s)
      加藤弘亮,恩田裕一,ズル・ヒルミ・サイディン,山口敏朗
    • Organizer
      日本地球惑星科学連合2017年大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 森林環境における 福島第一原発事故から7年間の 放射性セシウムの移行状況2017

    • Author(s)
      加藤 弘亮、恩田 裕一、 Zul Hilmi Saidin
    • Organizer
      第129回日本森林学会大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 福島原発事故から6年間の森林環境における放射性セシウムの移行状況2017

    • Author(s)
      加藤 弘亮、恩田 裕一
    • Organizer
      日本放射線影響学会第60回大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 森林環境における福島第一原発事故から五年間の放射性セシウムの移行状況2016

    • Author(s)
      恩田裕一、加藤弘亮、ロフレド・ニコラ、久留景吾
    • Organizer
      日本原子力学会 2016年秋の大会
    • Place of Presentation
      久留米シティプラザ(福岡県・久留米市)
    • Year and Date
      2016-09-07
    • Related Report
      2016 Research-status Report
  • [Presentation] Influence of radiocesium transfer and decontamination on ambient dose in Japanese forest environment2016

    • Author(s)
      Kato, H., Onda, Y.
    • Organizer
      European Geoscience Union General Assembly 2016
    • Place of Presentation
      Austria, Vienna
    • Year and Date
      2016-04-17
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Remarks] 研究代表者ホームページ、研究業績

    • URL

      http://katolab-geoenvironradioact.com/%e7%a0%94%e7%a9%b6%e6%a5%ad%e7%b8%be/

    • Related Report
      2018 Annual Research Report
  • [Remarks] 研究代表者ホームページ、研究発表

    • URL

      http://katolab-geoenvironradioact.com/%e7%a0%94%e7%a9%b6%e7%99%ba%e8%a1%a8/

    • Related Report
      2018 Annual Research Report

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Published: 2016-04-21   Modified: 2022-02-21  

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