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発表 Examination of hydrological indices for predicting landslides in regions with heavy snowfall

作成年度 2016 年度
論文名 Examination of hydrological indices for predicting landslides in regions with heavy snowfall
論文名(和訳)
論文副題
発表会 The 12th International symposium on landslides
誌名 The 12th International symposium on landslides,Naples,Italy
巻・号・回  
発表年月日 2016/06/12 ~ 2016/06/19
所属研究室/機関名 著者名(英名)
土木研究所M.Touhei
株式会社エイト日本開発技術T.Toriumi
国土交通省S.Katsura
北海道大学Y.Ishii
土木研究所H.Sugimoto
抄録
In regions with heavy snowfall, winter and spring, snowmelt can be major triggers for deep-seated landslides. Because landslides are controlled by hydrological conditions, monitoring subsurface flow and groundwater pressure can help predict them and inform appropriate measures for disaster evacuation and mitigation. Direct monitoring of the entire region is, however, unrealistic; simple prediction methods are required instead. We examined several indices based on hydrological factors, including rainfall intensity, river water level, and reservoir inflow, to assess their correlation with landslide disasters reported from December to June 2003-2013 in Chuetsu region, central Japan. The area, underlain by Neogene mudstone and tuff, is prone to snowmelt-activated landslides; snow depths can reach up to 100 cm a year. Among the indices pro-posed, reservoir inflow and river water level were the more indicative of landslides than rainfall in this region.
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