| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
On gravel beaches, measuring the displacement of individual grains is essential in order to understand sediment transport processes and beach morphology. Radio Frequency IDentification (RFID) technique makes us possible to detect and trace individual gravels marked by passive integrated transponders (PIT). Field test was conducted on a sand-gravel mixed beach. 190 painted gravels with PIT tags were released on the foreshore and traced for one month. The traceability of the RFID technique was roughly four times more efficient than the visual search. During some high wave events, gravels tend to accumulate on foreshore. On the contrary, in moderate wave conditions, foreshore tended to be regressive. The result is not consistent with a general understanding of beach morphology of uniform sediments. Based on the result of field survey, we conclude that effective sediment components changes due to sediment segregation by waves.
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