| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Outline of Final Research Achievements |
This study performed a 15-year monitoring program of erosion processes in the stream channels which had been aggraded by newly deposited sediment. The sediment was actively eroded for 5 years after the deposition, and then the erosion stopped. The grain size distribution of channel bed has changed from fine to coarse, and the cross-sectional profile of channel bed has changed from flat to partially degraded through the erosion period. The reason why the erosion stopped is estimated that the channel has become stable because of both enough capacity of low-flow channels for discharge and erosion resistance of coarse sediment.
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