| Budget Amount *help |
¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
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| Outline of Final Research Achievements |
In this study, hydraulic model experiments, numerical simulations and field observations were carried out for disaster mitigation and protection in gravel beaches. From experimental results using a two-dimensional wind-wave flume, it was found that wind effects on wave overtopping around vertical seawalls increased under low wave overtopping rate conditions. This suggested that it is important to consider the wind effects in designing vertical seawalls. It was revealed that the three-dimensional numerical wave flume including wind external force can compute wave overtopping rates. Wave-dissipation blocks accelerated deposition of gravel. From the field observations in the Shichiri-mihama coast, it was found that high waves propagating from south caused large topographic change. Moreover, image analysis results indicated the characteristics of the spatial-temporal distribution of the medium grain size in the Shichiri-mihama coast.
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