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A Study on Mapping of Potentially Unstable and Shallow-Seated Landslide Slopes in the Hilly Mountainous Regions, Northeast Japan

Research Project

Project/Area Number 17500696
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geography
Research InstitutionTohoku University

Principal Investigator

OTSUKI Yoshinori  Tohoku University, Graduate School of Science, Research Associate, 大学院理学研究科, 助手 (00272013)

Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2006: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2005: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsLandslide / Granitoid / Neogene Sedimentary Rocks / Natural Hazard / Landslide Disaster / Disaster Prevention / Slone Process
Research Abstract

The purpose of this study is to clarify the mapping method of potentially unstable slopes under heavy rainfall condition by using parameters related to the topography, geology and vegetation of actual shallow-seated landslides, and to discuss the relationships between the unstable areas and slope units.
In granitoid areas, the Abukuma Mountains, the critical safety factors which distinguish between unstable and stable slopes are presented by both geologic and vegetational conditions, on the basis of the field observations and soil mechanical experiments. In consideration of the thickness of decomposed granite soils and the slope gradient, it becomes clear that the unstable areas are concealed partly in the upper valley-side slopes, especially in the uppermost parts of them, which are considered to be relatively stable in general. It is therefore necessary to study further the relationships between classification of slope units and the processes of slope evolution from the view of micro landform classification.
On the other hand, surface landslides occur mainly in the lower valley-side slopes in the Neogene sedimentary rocks area, the Tomiya Hills. To make discrimination between the unstable and stable slopes in the Neogene areas should be discussed continuously as a future issue, because the critical state of the shallow-seated landslides occurring could not be currently revealed. In this regard, the landslide appearance and the changes of the soil moisture of valley-side slopes in the Neogene volcanic rocks area, the central highland of Kenya, could be made clear from the field survey and slope hydrological observations, where the topographical conditions are appreciably similar to those in the above-mentioned areas.

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (13 results)

All 2007 2006 2005

All Journal Article (13 results)

  • [Journal Article] 中央ケニア,熱帯高地および半乾燥農業地域における斜面プロセス.2007

    • Author(s)
      大月義徳, 佐々木明彦, 松林 武
    • Journal Title

      季刊地理学 59

      Pages: 43-44

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Slope Processes in the Highland Tropical and Semi-arid Agricultural Areas, Central Kenya2007

    • Author(s)
      OTSUKI, Y., SASAKI, A., MATSUBAYASHI, T.
    • Journal Title

      Quarterly Journal of Geography vol.59

      Pages: 43-44

    • NAID

      10018757044

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 中央ケニア、熱帯高地および半乾燥農業地域における斜面プロセス.2007

    • Author(s)
      大月義徳, 佐々木明彦, 松林 武
    • Journal Title

      季刊地理学 59(印刷中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 中国内モンゴル自治区武川県におけるガリー浸食-2003年からの観測結果を中心に-.2006

    • Author(s)
      大月義徳, 西城潔, 谷口多聞, 中村美里
    • Journal Title

      季刊地理学 58

      Pages: 191-191

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tectonic landforms near western fringe of the Aizu Basin, Northeast Japan.2006

    • Author(s)
      OTSUKI, Y.
    • Journal Title

      Proceedings of 2006 Korea-Japan/Japan-Korea geomorphological conferences

      Pages: 18-23

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Slope processes predominating in two agricultural areas in the tropical highland and semi-arid regions, Central Kenya.2006

    • Author(s)
      OTSUKI, Y., SASAKI, A., MATSUBAYASHI, T.
    • Journal Title

      2006 HighLand symposium on environmental change, geomorphic processes, land degradation, and rehabilitation in tropical and subtropical highland, book of abstract

      Pages: 76-76

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Gully erosion in agricultural lands since 2003, Wilchuan County, Inner Mongolia, China2006

    • Author(s)
      OTSUKI, Y., SAIJO, K., TANIGUCHI.T., NAKAMURA M.
    • Journal Title

      Quarterly Journal of Geography vol.58

      Pages: 191-191

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Tectonic landforms near western fringe of the Aizu Basin, Northeast Japan.2006

    • Author(s)
      OTSUKI. Y.
    • Journal Title

      Proceedings of 2006 Korea-Japan/Japan-Korea geomorphological conferences

      Pages: 18-23

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Slope processes predominating in two agricultural areas in the tropical highland and semi-arid regions, Central Kenya.2006

    • Author(s)
      OTSUKI, Y., 2006, SASAKI, A., MATSUBAYASHI, T.
    • Journal Title

      2006 HighLand symposium on environmental change, geomorphic processes, land degradation, and rehabilitation in tropical and subtropical highland, book of abstract

      Pages: 76-76

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 中国モンゴル自治区武川県におけるガリー浸食-2003年からの観測結果を中心に-.2006

    • Author(s)
      大月義徳, 西城潔, 谷口多聞, 中村美里
    • Journal Title

      季刊地理学 58

      Pages: 191-191

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Slope processes predominating in two agricultural areas in the tropical highland and semi-arid regions, Central Kenya.2006

    • Author(s)
      OTSUKI, Y., SASAKI, A., MATSHBAYASHI, T.
    • Journal Title

      2006 HighLand symposium on environmental change, geomorphic processes, land degradation, and rehabilitation in tropical and subtropical highland, book of abstract

      Pages: 76-76

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 中央ケニア,Nyandarua(Aberdare)山地周辺農業地域の地形プロセス2005

    • Author(s)
      大月義徳ほか
    • Journal Title

      日本アフリカ学会第42回学術大会研究発表要旨集

      Pages: 55-55

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 中央ケニア,Ewaso Ngiro川上流農業地域の地形形成環境2005

    • Author(s)
      大月義徳ほか
    • Journal Title

      日本地理学会発表要旨集 68

      Pages: 101-101

    • NAID

      10020532911

    • Related Report
      2005 Annual Research Report

URL: 

Published: 2005-04-01   Modified: 2016-04-21  

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