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Development of Soil Erosion Model and Application of Debris-Flow Model for Sediment Disaster Mitigation in Forested Watersheds

Research Project

Project/Area Number 19KK0392
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (A))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 40:Forestry and forest products science, applied aquatic science, and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Hotta Norifumi  東京大学, 大学院農学生命科学研究科(農学部), 准教授 (00323478)

Project Period (FY) 2020 – 2023
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Keywords土壌侵食モデル / GeoWEPP / 土砂流出 / 土石流数値計算 / 微細土砂 / 土石流 / 斜面崩壊 / 土壌浸食モデル / 数値計算 / 現地観測
Outline of Research at the Start

土壌浸食モデル(GeoWEPP)の開発(改訂)をニューヨーク州立大学バッファロー校で,申請者が開発した土石流モデルの適用をアメリカ地質調査所(USGS)でそれぞれ実施する.前者については基課題での成果を反映し,流木災害対策をより実効性の高いものとする.後者については,申請者のモデルとUSGSモデルの比較検証を通して基課題で開発したモデルの有効性を確認し,国際的な認知度を高める.流木災害軽減のためのモデル開発・適用という基課題の枠組みは,現在両機関が取り組む森林火災後の土石流災害の対策と共通点が多く,両機関との共同研究を通して,基課題を森林流域管理の国際標準手法の一つとすることを目指す.

Outline of Final Research Achievements

This study improved a soil erosion model and a debris-flow model for the mitigation of sediment disasters, including driftwood disasters. The soil erosion model reproduced long-term sediment discharge from forested watersheds by appropriately describing sediment dynamics on slopes and within channel sections, respectively. The debris-flow model, after analyzing field data and laboratory tests focusing on the behavior of debris flows on debris-flow fans, successfully reproduced the deposition patterns on these fans.

Academic Significance and Societal Importance of the Research Achievements

森林における長期的な土砂流出量が土壌侵食モデルで再現することで,森林管理の影響を数十年スケールで検討することが可能になる.一般に,日本における土砂流出は侵食などの面的な土砂生産より,崩壊や土石流などの局所的な土砂生産源が支配的であると考えられているが,土石流モデルによって土石流の堆積範囲を正確に予測することで,森林流域からの土砂流出量を,撹乱を考慮しつつ予測することが可能になる.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (20 results)

All 2024 2023 2022 2021

All Int'l Joint Research (2 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (14 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results)

  • [Int'l Joint Research] U.S. DEPARTMENT OF AGRICULTURE(米国)2023

    • Year and Date
      2023-09-15
    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Purdue University(米国)2022

    • Year and Date
      2022-10-02
    • Related Report
      2023 Annual Research Report
  • [Journal Article] Two-phase approach to modeling the grain-fluid flows with deposition and entrainment over rugged topography2024

    • Author(s)
      Wong Hock-Kiet、Tai Yih-Chin、Tsunetaka Haruka、Hotta Norifumi
    • Journal Title

      Advances in Water Resources

      Volume: 188 Pages: 104691-104691

    • DOI

      10.1016/j.advwatres.2024.104691

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Redistribution of the soil <sup>137</sup> Cs inventory through litter and sediment transport on a hillslope covered by deciduous forest in Fukushima, Japan2022

    • Author(s)
      Oda Tomoki、Hotta Norifumi、Miura Satoru、Endo Izuki、Tanoi Keitaro、Renschler Chris S.、Ohte Nobuhito
    • Journal Title

      Earth Surface Processes and Landforms

      Volume: 47 Issue: 10 Pages: 2531-2543

    • DOI

      10.1002/esp.5393

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Effect of debris-flow sediment grain-size distribution on fan morphology2022

    • Author(s)
      Tsunetaka Haruka、Hotta Norifumi、Sakai Yuichi、Wasklewicz Thad
    • Journal Title

      Earth Surface Dynamics

      Volume: 10 Issue: 4 Pages: 775-796

    • DOI

      10.5194/esurf-10-775-2022

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Multi-decadal changes in the relationships between rainfall characteristics and debris-flow occurrences in response to gully evolution after the 1990-1995 Mount Unzen eruptions2021

    • Author(s)
      Tsunetaka H, Shinohara Y, Hotta N, Gomez C, Sakai Y
    • Journal Title

      Earth Surface Processes and Landforms

      Volume: 46 Issue: 11 Pages: 2141-2162

    • DOI

      10.1002/esp.5148

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 流域への土砂供給は土石流扇状地を介してどのように制御されるのか?―大谷崩における研究を通して考えたこと2024

    • Author(s)
      堀田紀文
    • Organizer
      2024年日本地理学会春季学術大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 泥流の堆積機構の実験的検討2023

    • Author(s)
      酒井 佑一,堀田 紀文
    • Organizer
      日本地球惑星科学連合2023年大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 土壌侵食モデルを用いた森林流域からの土砂流出の再現性の検討2023

    • Author(s)
      堀田紀文, 裴靖, 佐藤貴紀, 田中延亮, 大谷侑也, 蔵治光一郎
    • Organizer
      令和5年度砂防学会研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Laboratory investigation of the effects of grain size on the dynamics of debris flows: Measurement of pore fluid pressure in an open channel2023

    • Author(s)
      Sakai Y, Hotta N
    • Organizer
      The 8th International Conference on Debris Flow Hazard Mitigation, Turin, Italy, 26-29 June 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A numerical model for large-scale landslides based on digital elevation models2023

    • Author(s)
      Sakai Y, Hotta N, Tobe J
    • Organizer
      The 8th Geoinformation Science Symposium 2023 "Geoinformation Science for Sustainable Planet" Hybrid Conference (Yogyakarta, Indonesia): 28-30 August 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 森林流域における50年間の土砂流出量変動と近年の増加要因の推定2023

    • Author(s)
      島田康平,勝山正則,堀田紀文
    • Organizer
      第134回日本森林学会大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 微細土砂の液相化を考慮した崩壊起因土石流の数値計算結果の比較2022

    • Author(s)
      堀田紀文,戸部潤一郎,酒井佑一,西口幸希,内田太郎
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Reproducing long-term sediment discharge with GeoWEPP in a steep watershed with forest recovery2022

    • Author(s)
      Norifumi Hotta, Gaku Nagaoka, Nobuaki Tanaka, Christian Renschler
    • Organizer
      AGU Fall meeting 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 泥流の堆積機構:二層モデルに基づく検討2022

    • Author(s)
      酒井佑一,堀田紀文
    • Organizer
      2022年度砂防学会研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] 森林の管理や状態変化が土砂流出に及ぼす影響2022

    • Author(s)
      堀田紀文,裴靖,田中延亮
    • Organizer
      第133回日本森林学会大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] GeoWEPPを用いた森林流域内の土砂生産量分布と土砂流出の評価2021

    • Author(s)
      裴靖, 長岡岳, 堀田紀文, 田中 延亮
    • Organizer
      第132回日本森林学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 森林の水源涵養機能の科学的な評価に向けて:モ デル化の展望2021

    • Author(s)
      堀田紀文
    • Organizer
      第132回日本森林学会大会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 微細土砂の液相化を考慮した数値計算は崩壊起因土石流の再現に有効か?2021

    • Author(s)
      戸部潤一郎,堀田紀文,酒井佑一,西口幸希,内田太郎
    • Organizer
      令和3年度(公社)砂防学会オンライン研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 均一粒径土石流における流れの遷移:間隙水圧の測定2021

    • Author(s)
      酒井佑一, 堀田紀文
    • Organizer
      令和3年度(公社)砂防学会オンライン研究発表会
    • Related Report
      2020 Research-status Report

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Published: 2020-02-06   Modified: 2025-01-30  

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