| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
Lahars derived from caldera volcanoes tend to be large and hazardous. Sedimentary architectures, depositional patterns, and bedforms of the lahar deposits, therefore, are important to understand properties, processes and mechanisms of large-scale hazardous flows. The present study carried out a Ground Penetrating Radar (GPR) survey on lahar deposits with approaching from geomorphological and sedimentological analysis. The results shows that 1) the GPR survey successfully obtained GPR images even with the complicated grainsize distribution and component in the lahar deposits, and 2) volcanic breakout flood deposits caused by large water discharge and rain-triggered lahar deposits can be differentiated by patterns in GPR images.
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