| Budget Amount *help |
¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2011: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
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| Research Abstract |
We reproduced tidal channels formed by tidal flow in an experimental flume, and performed statistic and fractal analyses to quantify geometrical features observed in the experiments. It is found from the analyses that the pattern of tidal fluctuation has a significant impact on the configuration of tidal channels. We performed numerical simulation of the formation of tidal channels with seepage flow considered. It is found that seepage flow has a strong influence on channel bifurcation, and that seepage flow increases the scale of tidal channels. It is suggested that small scale tidal channels are analogous to multiple bars formed in rivers, as channels formed on steep slopes subject to rainfall and rhomboid rills formed by waves. The large scale tidal channels are formed by sheet flow created by seepage flow coming from underground due to tidal fluctuations.
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