Deformation characteristics and influential factors for the giant Jinnosuke-dani landslide in the Haku-san Mountain area, Japan |
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Authors: | Fawu Wang T Okuno T Matsumoto |
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Institution: | (1) Research Centre on Landslides, Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji Kyoto, 611-0011, Japan;(2) Division of Civil and Environmental Engineering, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa Ishikawa, 920-1192, Japan;(3) Present address: Arai Sabo Agency, Jyoetsu Regional Development Bureau, Niigata Prefecture, Niigata, Japan |
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Abstract: | The Jinnosuke-dani landslide is a giant landslide 2,000 m long and 500 m wide in the Haku-san Mountain area, Japan. It was
also the first landslide to be designated as a “Landslide Prevention Area” according to the “Japan Landslide Prevention Law.”
This landslide consists of alternating layers of sandstone and shale in the Tedori Formation, which was deposited from the
Jurassic period to the Early Cretaceous. Based on deformation monitoring results for more than 7 years, the landslide is divided
into upper and lower blocks. The upper block has moved at a speed of 80 to 170 mm/year, while the lower block has moved more
slowly (3 to 15 mm/year). Monitoring data show that the variation of the groundwater level has a great influence on the landslide
movement. The deteriorating effect of the weathering of the alternating layers of sandstone and shale on the landslide deformation
has been confirmed by borehole exploration and monitoring. |
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Keywords: | Jinnosuke-dani landslide Ishikawa Prefecture Japan Weathering Rockslide Reversal of topography Groundwater Deformation Monitoring |
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