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Journal of Mountain Science

, Volume 13, Issue 2, pp 193–202 | Cite as

Case study of debris flow disaster scenario caused by torrential rain on Kiyomizu-dera, Kyoto, Japan - using Hyper KANAKO system

  • Kana NakataniEmail author
  • Satoshi Hayami
  • Yoshifumi Satofuka
  • Takahisa Mizuyama
Article

Abstract

This paper presents debris-flow numerical simulations using the Hyper KANAKO system, developed by the authors. The system uses the debris flow simulator KANAKO 2D equipped with a graphical user interface (GUI); hence, a user can easily produce appropriate landform data for simulations using standard laser profiler data, and visualize the results using a GIS. Hyper KANAKO was applied to the streams around Kiyomizu-dera in Kyoto, Japan. Kiyomizu-dera is a famous temple in Japan which is visited by numerous tourists throughout the year. We simulated a disaster scenario of debris flow caused by torrential rain. We set the hydrograph using rainfall intensity data, and set the landform data using information from the Geospatial Information Authority of Japan (GSI) and a digital elevation model (DEM). We evaluated different mesh sizes and also used a digital surface model (DSM) to consider the building heights. The simulation results showed that with small mesh size, the debris flow moved through the roads, which seems realistic for a disaster situation. When buildings were considered, the flow direction changed, and a 1-m flow depth, which was deeper than in other cases, appeared in the flow path. This may pose a dangerous situation for evacuations.

Keywords

Debris flow Simulation GIS Hyper KANAKO system Torrential rain Kiyomizu-dera 

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Copyright information

© Science Press, Institute of Mountain Hazards and Environment, CAS and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Kana Nakatani
    • 1
    Email author
  • Satoshi Hayami
    • 2
  • Yoshifumi Satofuka
    • 3
  • Takahisa Mizuyama
    • 4
  1. 1.Department of Erosion Control EngineeringKyoto UniversityKyotoJapan
  2. 2.CTI Engineering Co.,Ltd.OsakaJapan
  3. 3.Department of Civil EngineeringRitsumeikan UniversityShigaJapan
  4. 4.National Graduate Institute for Policy StudiesTokyoJapan

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