| Budget Amount *help |
¥24,050,000 (Direct Cost: ¥18,500,000、Indirect Cost: ¥5,550,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2013: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2012: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
Fiscal Year 2011: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
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| Outline of Final Research Achievements |
Through the application of our theoretical framework called LIQSEDFLOW to a submarine field and the integrated use of centrifuge experiments and analyses, we comprehensively revealed the large-scale submarine sediment flow dynamics in coastal oceans. In particular, the present results demonstrated the crucial role of two-phase physics such as the development and propagation of internally solidified zone in the formation of scarps and terrace in submarine liquefied flows. Furthermore, we developed a new tsunami-sediment centrifuge experiment system and applied it to investigate the concurrent processes of tsunami scour, seepage and sediment flows at the vicinity of breakwaters. It is found that the coupled tsunami overflow-seepage promoted the development of scour significantly, resulting in the failure of breakwaters. These findings would effectively contribute to the rational prediction and assessment of coastal disaster risks associated with submarine sediment flows.
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