2011 Fiscal Year Final Research Report
Modeling of Sediment Dynamics According to Geological Heterogeneity of River Basin with Particular References to Sorting, Abrasion and Confluence Processes
| 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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| 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 |
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| 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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Research Products
(13 results)
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[Remarks] 田代喬:矢作川の土砂流出の特徴,河川の土砂流出と底生生物に関する談話会～矢作川をフィールドとして,河川環境管理財団名古屋事務所, 2011年2月18日
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[Remarks] 田代喬:流域の地質構造と河床材料構成の関係について:砂礫の元素組成,磨耗・破砕特性からみた流下方向変化と生態的影響,「流域からの流出土砂が河川に及ぼす影響」セミナー,独立行政法人土木研究所自然共生研究センター, 2010年11月15日
