| Project/Area Number |
22656108
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Hydraulic engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TODA Yuji 名古屋大学, 工学研究科, 准教授 (60301173)
TASHIRO Takashi 名古屋大学, 環境学研究科, 准教授 (30391618)
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | 表層地質 / 材料の摩耗・破砕 / 土砂動態モデル / 土砂の生産・流出 / 山地礫床河川 / 河床生息場所 / 地理情報システム |
|---|
| Research Abstract |
Most gravel-bed rivers show the longitudinal sorting on riverbed materials. This phenomenon is due to combination of the selective sorting and the abrasion in bed material transport processes. In order to clarify the mechanism of sediment dynamics in mountainous streams, we analyzed some gravel abrasion processes with laboratory experiments, and then developed the stochastic model of bed-load transport with gravel abrasion processes. Applying this model to some ideal rivers which have different concavities in their longitudinal profiles and different geologies in their watersheds, we examined that the longitudinal sorting of bed materials was dependent not only on the selective transport, but also on the abrasion processes characterized by the geology and lithology.
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