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Experimental study on the development of mountains and critical slopes

Research Project

Project/Area Number 26350405
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geography
Research InstitutionChuo University

Principal Investigator

Ouchi Shunji  中央大学, 理工学部, 教授 (00185191)

Project Period (FY) 2014-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords地形発達実験 / 隆起 / 人工降雨 / 流水侵食 / 斜面プロセス / 斜面崩壊 / 平衡高度 / 隆起速度 / 透水性 / 剪断強度 / 発達ステージ / 降雨侵食実験 / 隆起速度の閾値 / 実験山地の発達 / 降雨強度 / 堆積域の幅 / 山地の成長限界 / 流水浸食
Outline of Final Research Achievements

Applying rainfall on a rising flat surface made of a mixture of fine sand and kaolinite induces valley development from edges. As valleys incise, slopes grow and slope failures start to occur. Material yielded by slope failures is quickly drained out by stream flows, and this reduces the rising rate of average height. Increasing frequency and size of slope failures leads the landform to the stage of steady state, in which erosion balances with uplift to keep average height around a certain level. High rainfall promotes fluvial erosion and restrains the surface rising in earlier stages, resulting in lower steady state height. When the permeability of sand mound is reduced, however, lower rainfall makes the steady state height lower, because high permeability intensifies slope processes. A change in a controlling factor draws different response from each element of erosion, namely, stream flow, slope processes and slope failures, to make the development of landform very complex.

Report

(5 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • 2014 Research-status Report

Research Products

(11 results)

All 2017 2016 2015 2014

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Acknowledgement Compliant: 1 results) Presentation (10 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Experimental landform development by rainfall erosion with uplift at various rates2015

    • Author(s)
      Ouchi, Shunji
    • Journal Title

      Geomorphology

      Volume: 238

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 降雨侵食と隆起による実験地形発達における堆積域幅の効果2017

    • Author(s)
      大内俊二
    • Organizer
      日本堆積学会2017年松本大会
    • Place of Presentation
      信州大学、松本市
    • Year and Date
      2017-03-29
    • Related Report
      2016 Research-status Report
  • [Presentation] Effects of permeability on the combination of fluvial erosion and slope failures as the main process of erosion in the development of experimental landform2017

    • Author(s)
      Ouchi, Shunji
    • Organizer
      Geological Sochiety of America 2017 annual meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 実験地形の発達における透水性の影響について2017

    • Author(s)
      大内俊二
    • Organizer
      日本地球惑星科学連合2017年大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Factors controlling the development of experimental erosion landform2016

    • Author(s)
      Shunji Ouchi
    • Organizer
      2016 Annual meeting of Geological Society of America
    • Place of Presentation
      Colorado Convention Center, Denve、Colorador
    • Year and Date
      2016-09-26
    • Related Report
      2016 Research-status Report
  • [Presentation] 実験地形発達における堆積域幅の影響2016

    • Author(s)
      大内俊二
    • Organizer
      日本地球惑星科学連合2016年大会
    • Place of Presentation
      幕張メッセ
    • Year and Date
      2016-05-23
    • Related Report
      2016 Research-status Report
  • [Presentation] 実験侵食地形の発達における堆積域幅の影響2016

    • Author(s)
      大内俊二
    • Organizer
      日本地球惑星科学連合2016年連合大会
    • Place of Presentation
      幕張メッセ
    • Year and Date
      2016-05-23
    • Related Report
      2015 Research-status Report
  • [Presentation] 降雨侵食と隆起による実験地形発達における降雨強度の影響2016

    • Author(s)
      大内俊二
    • Organizer
      日本地理学会2016年春季学術大会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2016-03-21
    • Related Report
      2015 Research-status Report
  • [Presentation] Processes of erosion and sediment yield during the development of experimental landform with rainfall-erosion and uplift at various rates.2015

    • Author(s)
      Ouchi, Shunji
    • Organizer
      XIX INQUA Congress, T01523
    • Place of Presentation
      Nagoya Congress Center
    • Year and Date
      2015-08-01
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Processes of erosion and sediment yield during the development of experimental landform with rainfall-erosion and uplift at various rates2015

    • Author(s)
      ouchi, Shunji
    • Organizer
      XIX INQUA Congress
    • Place of Presentation
      Nagoya Congress Center
    • Year and Date
      2015-07-26 – 2015-08-02
    • Related Report
      2014 Research-status Report
  • [Presentation] 実験地形の発達における山地の成長限界について2014

    • Author(s)
      大内俊二
    • Organizer
      日本地球惑星科学連合2014年大会
    • Place of Presentation
      パシフィコヨコハマ
    • Year and Date
      2014-04-29 – 2014-05-06
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2019-03-29  

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