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Prediction of Viscous Debris Flow and Its Mitigation

Research Project

Project/Area Number 07044144
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research Field Natural disaster science
Research InstitutionKyoto University

Principal Investigator

TAKAHASHI Tamotsu  Kyoto Univ., Disaster Prevention Reserach Inst., Prof., 防災研究所, 教授 (40027230)

Co-Investigator(Kenkyū-buntansha) OU Gochan  Chinese Academy of Science, Inst. of Mountain Disasters and Environment Prof, 成都山地災害環境研究所, 教授
ARAI Muneyuki  Meijo Univ., Faculty of Science and Engineering, Assoc.Prof., 理工学部, 助教授 (90103259)
MIZUYAMA Takahisa  Kyoto Univ., Graduate School of Agriculture, Prof., 農学研究科, 教授 (00229717)
SUWA Hiroshi  Kyoto Univ., Disaster Prevention Research Inst., Assoc.Prof., 防災研究所, 助教授 (00093253)
SAWADA Toyoaki  Kyoto Univ., Disaster Prevention Research Inst., Assoc.Prof., 防災研究所, 助教授 (60027258)
張 軍  中国科学院, 東川泥石流観測所, 副所長
康 志成  中国科学院, 成都山地災害環境研究所, 教授
呉 積善  中国科学院, 成都山地災害環境研究所, 教授
Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥8,500,000 (Direct Cost: ¥8,500,000)
Fiscal Year 1997: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1996: ¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1995: ¥3,200,000 (Direct Cost: ¥3,200,000)
Keywordsviscous debris flow / intermittency / mechanics / material property / occurrence condition / deposition / topographical change / countermeasures / 蒋家溝 / 地形変動 / 発生降雨 / 間歇性 / 現地観測
Research Abstract

The research aimed to make clear the mechanism of flow, the process of occurrence and the method to cope with for the viscous type debris flows. The joint research has been implemented by observing the actial flow in the Jiangjia test field in Yunnan Province, china together with the basic research in the laboratory.
Every time when the Japanse staff members visited the test field, the debris flow occurred and the details of the actuality of the flow were grasped. Different from the stony type debris flow, the viscous type debris flows have happened rather long after the intense rainfall and they have appeared as the numerous surges. From these characteristics a conclusion that each surge has been produced by a small scale landslide has deduced.
The viscous debris flow used to be explained by the Bingham fluid model that attributed the stoppage of the flow between the successive surges to the yield strength of the material. The data of the observation, however, denied the existence of such a strength, and therefore a new Newtonian fluid model was introduced. The mechanism for supporting concentrated solid particles in the laminar Newtonian fluid was made clear and formulae for deposition velocity of the particles and for the resistance to flow were deduced. Thereby, a numerical simulation of the debris flow became possible.
The deatailed survey of the topographical change before and after the debris flow and the examination of the effectiveness of the countermeasures in the actual basins suggested the principle to cope with the viscous debris flows.

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] Takahashi, T. et al.: "Dynamics of the inertial and viscous debris flows" Lecture Notes in Earth Sciences. 64. 117-143 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 高橋 保・他: "粘性土石流の流動機構に関する研究(2)-広い粒度分布を持った材料による水路実験-" 京都大学防災研究所年報. No.40 IDNDR S.I.173-181 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Takahashi, T. and Arai, M.: "Mechanism of viscous debris flow" Proc. International Symp. on Natural Disaster Prediction and Mitigation. 231-238 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 水山 高久・他: "中国雲南省東川市周辺の土石流対策(第2報)" 砂防学会誌. 49,6. 29-33 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 諏訪 浩・他: "粘性土石流の発生、流動、堆積のメカニズムと対策" 京都大学防災研究所年報. No.40 IDNDR S.I.159-165 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Mizuyama, T. et al.: "Prediction of debris flow hydrographs passing through grid type control structures" Proc. First International Conference on Debris-Flow Hazard Mitigation, ASCE. 74-82 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Takahashi, T.et al.: "Dynamics of the inertial and viscous debris flows" Lecture Notes in Earth Sciences. 64. 117-143 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Takahashi, T.et al.: "Mechanics of the viscous type debris flow (2)--Flume experiments using well-granded sediment mixture--" Annuals of Disaster Prevention Research Institute, Kyoto Univ.No.40 IDNDR S.I.173-181 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Takahashi, T.and Arai, M.: "Mechanism of viscous debris flow" Proc.International Symp.on Natural Disaster Prediction and Mitigation. (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Mizuyama, T.et al.: "Debris flow control in and around Dongchuang city in Yunnan, China" Journal of Japan Society of Erosion Control Engineering. Vol.49, No.6. 29-33 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Suwa, H.Sawada, T.et al.: "Studies on the mechanism of viscous debris flows and countermeasures against them" Annuals of Disaster Prevention Pesearch Institute, Kyoto Univ.No.40 IDNDR S.I.159-166 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Mizuyama, T.et al.: "Prediction of debris flow hydrographs passing through grid type control structures" Proc. First International Conf.on Debris-Flow Hazard Mitigation, ASCE. 74-82 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Takahashi, T.et al.: "Dynamics of the inertial and viscous debris flows" Lecture Notes in Earth Sciences. 64. 117-143 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 高橋 保・他: "粘性土石流の流動機構に関する研究(2)-広い粒度分布を持った材料による水路実験-" 京都大学防災研究所年報. No.40 IDNDR S.I.173-181 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Takahashi, T.and Arai, M.: "Mechanism of viscous debris flow" Proc.International Symp.On Natural Disaster Prediction and Mitigation. (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 水山 高久・他: "中国雲南省東川市周辺の土石流対策(第2報)" 砂防学会誌. 49.6. 29-33 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 諏訪 浩・他: "粘性土石流の発生、流動、堆積のメカニズムと対策" 京都大学防災研究所年報. No.40 IDNDR S.I.159-165 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Mizuyama, T.et al.: "Prediction of debris flow hydrographs passing through grid type control structures" Proc.First International Conference on Debris-Flow Hazard Mitigation,ASCE. 74-82 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 水山高久・高橋保他: "中国雲南省東川市周辺の土石流対策(第2報)" 砂防学会誌. 49巻6号. 29-33 (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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