| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Research Abstract |
The purposes of this study are to make clear the bedrock erosion mechanism and the erosion rate to reveal the riverbed degradation due to bedrock erosion which has been going on rapidly. I performed experiments on the bedrock erosion rate by using bedrock samples picking from actual rivers where bedrock was exposed. As the results of the experiments, I found that the erosion rate in the case with sediment supply was much larger than that only with flowing water and the erosion rate showed dependence on the amount of sediment supply. I also reviewed results of other experiments performed before to make a formula of the bedrock erosion rate which consists of the amount of sediment supply, particle size and bedrock properties.
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