| Budget Amount *help |
¥23,660,000 (Direct Cost: ¥18,200,000、Indirect Cost: ¥5,460,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥21,060,000 (Direct Cost: ¥16,200,000、Indirect Cost: ¥4,860,000)
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| Outline of Final Research Achievements |
Fiber optic cable was installed into a vertical borehole with its depth of 16 m in a landslide. Strain changes along the borehole were measured from June to October 2017 with spatial resolution of 10 cm. Results show that strain clearly increased with rainfall events. Distinctive strain changes are found at the depths of (1) 1－5 m, (2) approximately 8 m, and (3) 14－15.5 m. The strain changes around 8 m appear to show a deformation of the slip plane. This study has developed a promising geophysical method which can become a major current for landslide monitoring.
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