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Proposal for prevention strategies against the enlarged turbidity currents

Research Project

Project/Area Number 23651181
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Natural disaster science
Research InstitutionOsaka Prefecture University

Principal Investigator

BABA Nobuhiro  大阪府立大学, 工学(系)研究科(研究院), 教授 (10198947)

Project Period (FY) 2011 – 2013
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords土砂災害 / 防災 / 乱泥流 / 重力流 / 計算流体力学
Research Abstract

This study proposes the practical methods of controlling the turbidity currents and the strategies to protect human properties in the serious disasters which have been more frequently brought about by heavy precipitation extraordinarily concentrated in some local mountainous areas due to global warming. We carried out the experiments using a small inclined tank and the computations based on the finite volume solution of the Navier-Stokes equations for such enlarged turbidity currents. The results indicate that the interaction of the currents with the obstacles certainly reduces the rate of energy supply to the head from the latter part of the current by dividing the powerful head with a large amount of the mass and energy into the upper and lower parts. It is found that as a result even the system of horizontal flat structures away from the bottom has considerable effects to depress the destructive impact force without any burden on the environment.

Report

(4 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • 2011 Research-status Report
  • Research Products

    (2 results)

All 2012

All Presentation (2 results)

  • [Presentation] 重力流の先端速度に及ぼす壁面摩擦の影響2012

    • Author(s)
      森田哲, 馬場信弘
    • Organizer
      日本船舶海洋工学会秋季講演会
    • Place of Presentation
      千葉
    • Year and Date
      2012-11-26
    • Related Report
      2013 Final Research Report 2012 Research-status Report
  • [Presentation] 乱泥流のエネルギーの計測と制御に関する実験2012

    • Author(s)
      冨宿敦志, 馬場信弘
    • Organizer
      日本船舶海洋工学会秋季講演会
    • Place of Presentation
      千葉
    • Year and Date
      2012-11-26
    • Related Report
      2013 Final Research Report 2012 Research-status Report

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Published: 2011-08-05   Modified: 2019-07-29  

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