| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
By observing all class A rivers in Japan, Japan island is divided into 18 regions. We selected target sites from Segment M, 1 and 2-2 of several regions and examine the relationship between representative diameter and Shields number under the mean annual maximum discharge. Consequently, it was clarified that the size distribution and the movement frequency of riverbed material depend on the geomorphological condition of each region. Representative diameter in Segment M and 2-2 is quite different, but the shape of size distribution is quite similar when relatively coarse material is contained. We found that the distribution pattern makes porosity as small as possible.On the other side, the size distribution in Segment 1 is relatively uniform and the frequency of movement is relatively low.
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