| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Outline of Final Research Achievements |
The cohesive materials which contained clay and had full compaction came to be exposed on actual riverbed, e.g., the Kinugawa River. Due to this, it was reported that the erosion of an unprecedented scale occurred. In this study, a series of fundamental movable bed experiments were conducted to elucidate the mechanism of such cohesive sediment erosion. As a result, it was made clear what kind of change appeared for the erosion of the clay riverbed by sand and gravel which had been transported as bed load from upstream reach of river. In addition, the numerical prediction technique was newly developed. It enables us to predict a deformation of the bed or slope which contained clay. It was applied to a surface erosion phenomenon of the bare slope. And another flume experiments were conducted in order to verify validity of this technique. As a result, it was verified that the formation process of channel network on a slope can be predicted precisely by this technique.
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