| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
A catalogue of 4,744 recent landslides associated with rainfall events throughout Japan indicates that large landslides dominated the volumetric budget when total rainfall, maximum rainfall intensity, and mean rainfall intensity exceeded ~250 mm, ~35 mm/h, and ~4 mm/h, respectively. However, neither the most frequent nor the most extreme rainfall parameters triggered the highest landslide volumes consistently. Instead, the maximum of volumetric landslide production may largely be tied to comparatively rare typhoons. Only rainfall totals appear to be a suitable predictor of landslide volumes mobilized during typhoons and frontal storms. Our results pinpoint rainfall thresholds that triggered the highest frequency and the highest total volume of landslides in Japan with average return periods of <40 yr （Saito et al., 2014, Geology）.
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