Sediment Transport Processes in Rivers

河流中的泥沙输送过程

• 批准号: 60460162
• 负责人: ASHIDA Kazuo
• 金额: $ 3.78万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60460162/
• 关键词: Sediment Discharge; Bed Load; Suspended Load; Sediment Mixture; Steep Slope Stream; Armour Coat; Mountain Stream; 階段状河床波

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.

山流的特征是陡峭的坡度，各种谷物尺寸和小排水区。因此，正如质量运动或单个谷物运动现象所示，沉积物运输的机理非常复杂。在这项研究中，选择了三个有关剪切应力分布，床负荷和悬浮载荷的受试者，这些受试者是选择的，以供剪池形态和混合物的沉积物运动之间的关系来考虑。本研究的结果表明（1）开发了直接通道横截面中的剪切应力分布的理论方法，此外，还通过实验研究了带有阶梯池形态的沿水槽床沿槽床的剪切应力分布模式。（2）提出了一种评估沉积物传输现象的数学模型。数值预测是用沉积物传输速率和运输沉积物和床沉积物的沉积物尺寸分布的模型进行的，并与水槽数据进行了比较。这些结果似乎满足了本研究的目的。

项目成果

Kazuo ASHIDA: "Sediment Transport Mechanism on Step-Pool Bed Form" Annuals, Disas. Prev. Res. Inst., Kyoto Univ.No.29B-2. 377-390 (1986)

Kazuo ASHIDA：“阶梯池床形式的沉积物输送机制”年鉴，Disas。

芦田和男: 土木学会論文集. No.375. 79-88 (1986)

Kazuo Ashida：日本土木工程师学会论文集第 375 期（1986 年）。

芦田和男: 京都大学防災研究所年報. 29号B-2. 377-390 (1986)

Kazuo Ashida：京都大学防灾研究所年度报告第 29 B-2 号（1986 年）。

芦田和男: 土木学会論文集. No.375. 107-116 (1986)

Kazuo Ashida：日本土木工程师学会会议记录第 375 期（1986 年）。

芦田 和男: 京都大学防災研究所年報. 29.B-2. 391-403 (1986)

Kazuo Ashida：京都大学防灾研究所年度报告29.B-2（1986）。