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地形発達効果および気候変動を考慮した斜面危険度の広域評価

Research Project

Project/Area Number 16F16378
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section外国
Research Field Hydraulic engineering
Research InstitutionKyoto University

Principal Investigator

中北 英一  京都大学, 防災研究所, 教授 (70183506)

Co-Investigator(Kenkyū-buntansha) WU YING-HSIN  京都大学, 防災研究所, 外国人特別研究員
Project Period (FY) 2016-11-07 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2018: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2017: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2016: ¥200,000 (Direct Cost: ¥200,000)
Keywordsvegetation / groundwater / Poroelasticity / Mohr-Coulomb theory / Finite element analysis / hillslope stability / extreme climate / Numerical simulation / landscape evolution / climate change
Outline of Annual Research Achievements

As our environment becomes warmer, extreme climate becomes more frequent. Global warming directly or indirectly influences hillslope vegetation, landform and stability, which are the dominant factors for hazard occurrence on slopeland. To perform slopeland hazard assessment, the analysis target is landslide which is the origin of all kinds of slopeland hazards. This research aims to develop a methodology which can achieve high resolution prediction of slopeland hazards under climate change impact. In last two years, we have successfully finished the development of a novel mechanically based landslide model to identify three-dimensional unstable zones prone to landslide in irregular topsoil layers on steep and vegetated hillslopes by using Poroelasticity, Mohr-Coulomb failure theory and tree allometry. Two historical events occurred in Hiroshima, Japan in July 2014 and in Seoul, Korea in July 2011 are used for verification and case studies. The simulated results are in good agreements with real field conditions. For 3D groundwater modeling, we successfully analytically investigate hydraulic groundwater theory to propose a new way for correct modeling, and perform numerical modeling of groundwater table evolution in irregular 3D soil layer using relaxation approach. Both of the models above have been integrated to achieve 3D landslide prediction in the high resolution. However, the part for landscape evolution simulation is still under development, and to be appear in the near future for comprehensive modeling of hillslope process under long-term climate change influence.

Research Progress Status

平成30年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

平成30年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (17 results)

All 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Int'l Joint Research] Gangneung-Wonju National University(韓国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] National Cheng Kung University(その他の国・地域 台湾)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Reply to Comment by Kong et al. on “Appropriate boundary condition for Dupuit-Boussinesq theory on the steady groundwater flow in an unconfined sloping aquifer with uniform recharge.”2019

    • Author(s)
      Wu, Y.-H., Sayama, T., Nakakita, E
    • Journal Title

      Water Resources Research

      Volume: 55 Issue: 4 Pages: 3597-3598

    • DOI

      10.1029/2019wr024872

    • NAID

      120006636635

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Appropriate boundary condition for Dupuit-Boussinesq theory on the steady groundwater flow in an unconfined sloping aquifer with recharge2018

    • Author(s)
      Wu, Y.-H., Sayama, T., Nakakita, E
    • Journal Title

      Water Resources Research

      Volume: 54 Issue: 9 Pages: 5933-5947

    • DOI

      10.1029/2018wr023070

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A transient model for shallow groundwater table evolution in an unconfined sloping aquifer2018

    • Author(s)
      Wu, Y.-H., Nakakita, E.
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

      Volume: 75(4)

    • NAID

      130007757787

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Transient Model for Shallow Groundwater Table Evolution in An Unconfined Sloping Aquifer Considering Variable Rainfall Recharge2018

    • Author(s)
      Wu, Y.-H., Nakakita, E.
    • Journal Title

      DPRI Annuals

      Volume: 61B Pages: 572-581

    • NAID

      120006546127

    • Related Report
      2018 Annual Research Report
  • [Presentation] A three-dimensional mechanical based model for shallow landslide: a case study of the 2011 Seoul debris flow disaster2018

    • Author(s)
      Wu, Y.-H., Hung, C., Yune, C.Y., Nakakita, E.
    • Organizer
      AGU Fall Meeting 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Fully Three-dimensional Model for Stress Field Analysis in a Soil Layer on a Soil-mantled Hillslope2018

    • Author(s)
      Wu, Y.-H., Nakakita, E.
    • Organizer
      AOGS 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A transient model for shallow groundwater table evolution in an unconfined sloping aquifer2018

    • Author(s)
      Wu, Y.-H., Nakakita, E.
    • Organizer
      Annual Conference of JSCE Journal of Hydraulic Engineering
    • Related Report
      2018 Annual Research Report
  • [Presentation] A Depth-Integrated Model of Subsurface Flow in Unconfined Hillslope Aquifers2018

    • Author(s)
      Wu, Y.-H., Nakakita, E.
    • Organizer
      Annual Meeting of Japan Society of Hydrology and Water Resources
    • Related Report
      2018 Annual Research Report
  • [Presentation] A New Model of Subsurface Flow in an Unconfined Surface Soil Layer on an Irregular Hillslope2018

    • Author(s)
      Wu, Y.-H., Nakakita, E.
    • Organizer
      JSCE Annual Symposium 2018
    • Related Report
      2018 Annual Research Report
  • [Presentation] A three-dimensional model of subsurface flow in an unconfined surface soil layer on an irregular hillslope2018

    • Author(s)
      Wu, Y.-H., Nakakita, E.
    • Organizer
      H29 DPRI Annual Meeting
    • Related Report
      2018 Annual Research Report
  • [Presentation] A three-dimensional model of subsurface flow in an unconfined surface soil layer on an irregular hillslope2018

    • Author(s)
      Ying-Hsin Wu, Eiichi Nakakita
    • Organizer
      H29 DPRI Annual Meeting
    • Related Report
      2017 Annual Research Report
  • [Presentation] A new method of fully three dimensional analysis of stress field in the soil layer of a soil-mantled hillslope2017

    • Author(s)
      Ying-Hsin Wu, Eiichi Nakakita
    • Organizer
      AGU Fall Meeting 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ill-posed problem on one-dimensional steady groundwater flow in an unconfined hillslope with recharge2017

    • Author(s)
      Ying-Hsin Wu, Takahiro Sayama, Eiichi Nakakita
    • Organizer
      Annual Meeting of Japan Society of Hydrology and Water Resources
    • Related Report
      2017 Annual Research Report
  • [Presentation] A New Method for Safety Analysis of Vegetated Hillslopes under Different Rainfall2017

    • Author(s)
      Ying-Hsin Wu, Eiichi Nakakita
    • Organizer
      JSCE Annual Symposium 2017
    • Related Report
      2017 Annual Research Report
  • [Presentation] A Novel Method for Analysis of Stresses on Hillslopes Considering Climate Change Effect2017

    • Author(s)
      Ying-Hsin Wu, Eiichi Nakakita
    • Organizer
      H28 Annual Meeting of DPRI
    • Place of Presentation
      Kyoto University Uji Campus, Kyoto, Japan
    • Related Report
      2016 Annual Research Report

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Published: 2016-11-08   Modified: 2024-03-26  

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