| Project/Area Number |
60460162
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Hydraulic engineering
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| Research Institution | Kyoto University |
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Principal Investigator |
ASHIDA Kazuo Disaster Prevention Research Institute, Kyoto University, 防災研究所, 教授 (30027205)
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| Co-Investigator(Kenkyū-buntansha) |
FUJITA Masaharu Disaster Prevention Research Institute, Kyoto University, 防災研究所, 助手 (60181369)
SAWADA Toyoaki Disaster Prevention Research Institute, Kyoto University, 防災研究所, 助手 (60027258)
EGASHIRA Shinji Disaster Prevention Research Institute, Kyoto University, 防災研究所, 助教授 (00027286)
SAWAI Kenji Disaster Prevention Research Institute, Kyoto University, 防災研究所, 助教授 (70109073)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1986: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1985: ¥3,500,000 (Direct Cost: ¥3,500,000)
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| Keywords | Sediment Discharge / Bed Load / Suspended Load / Sediment Mixture / Steep Slope Stream / Armour Coat / Mountain Stream / 階段状河床波 |
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| Research Abstract |
Mountain streams are characterized by such features as steep slope,a wide range of grain sizes, and small drainage area. Mechanisms of sediment transportation, therefore, are very complex, as seen in the phenomena of mass movement or individual grain motion. In this study, three subjects which are concerning the shear stress distribution, bed load and suspended load in terms of relation between step-pool morphology and sediment movement of mixtures are chosen for consideration. The results of the present study show
(1) A theoretical method to calculate the shear stress distribution in cross section of straight channel is developed, and in addition the pattern of shear stress distribution along the flume bed with step-pool morphology is investigated experimentally.
(2) A mathematical model to evaluate the sediment transport phenomena is presented. Numerical predictions are made with the model for sediment transport rates and sediment size distributions of the transported sediment as well as bed sediment and are compared with the flume data. These results appear to satisfy the aim of the present study.
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