2014 Fiscal Year Final Research Report
Fluvial response to an eruption: geomorphology and sedimentology of caldera lake breakouts and rain-triggered lahars
| Project/Area Number |
24710200
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Natural disaster science
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| Research Institution | Niigata University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | ラハール / 洪水 / 地中レーダ / カルデラ / ダム湖 / 火山泥流 / 火山防災 / 土砂災害 |
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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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| Free Research Field |
地質学
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