| 坡面非均匀沙输移机理实验方法 |
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| 引用本文： | 王协康,方铎,曹叔尤,姚令侃.坡面非均匀沙输移机理实验方法[J].山地学报,1999,17(3):230-234. |
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| 作者姓名： | 王协康 方铎 曹叔尤 姚令侃 |
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| 作者单位： | 1. 四川大学高速水力学国家重点实验室,成都,610065
2. 西南交通大学铁道工程系,成都,610031 |
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| 基金项目： | 国家自然科学基金,国家自然科学基金委员会与水利部联合资助项目 |
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| 摘 要： | 在分析坡面泥沙输移现象的基础上，以室内沙堆模型实验量化其输沙特征，得出其在空间上具有自相似分形的动力学过程，从理论上应用水动力学弥散特性进一步证实，结果符合较好。
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| 关 键 词： | 非均匀沙 泥沙输移 自相似分形 水动力学弥散 |
| 修稿时间： | 1998-08-27 |
EXPERIMENT STUDY ON TRANSPORT THEORY OF NON-UNIFORM SEDIMENT IN THE SLOPE |
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| WANG Xie-kang,FANG Duo,CAO Shu-you,YIAO Ling-kan.EXPERIMENT STUDY ON TRANSPORT THEORY OF NON-UNIFORM SEDIMENT IN THE SLOPE[J].Journal of Mountain Research,1999,17(3):230-234. |
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| Authors: | WANG Xie-kang FANG Duo CAO Shu-you YIAO Ling-kan |
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| Institution: | 1Sichuan University State Key Hydraulics Laboratory of High Speed Flows Chengdu Chengdu 610065; 2Department of Railway Engineering of South_West Jiaotong University Chengdu 610031 |
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| Abstract: | The slope soil erosion and its transport is a complex problem, because the velocity of runoff, sediment diameter and its distribution and other factors also affect the soil erosion and transport processes. Some researchers pointed out that this phenomenon could be divided into two processes, one is soil particle dispersion, the other is sediment transport of runoff. Based on the analysis of the phenomenon of sediment transport in the slope, the characteristics of sediment transport was summerized by means of experimental model. During the experiment of sediment transport, we finished five groups of sedimental models in different sedimental distribution, the experimental result of each group was analyzed and discussed, according to the analysis of experimental result in the table 2,3,4, we believed that the characteristics of sediment transport in the slope was self_similar fractal dynamic process in the space, which was verifed in the theory by advection_dispersion of water dynamics, because the result of the linear analysis shows that the average fractal dimension of sediment transport is 1.65, the value is almost the same as the fractal dimension of advection_dispersion(1.627). According to the research result, the quantity of sediment transport of non_uniform sediment piles shows fractal characteristic from the statistical significance, which is the external appearance of non_uniform sediment piles. Furthermore, the degree of longitudinal advection_dispersion can explain the statistical characteristic of sediment transport rate, which will give a new method to study the characteristic of non_uniform sediment. That is to say, we can obtain signals of the sediment transport rate through the research result, which is important for hydraulic engineering projects involving sediment in practice. |
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| Keywords: | non_uniform sediment sediment transport self_similar fractal process advection _dispersion of water dynamics |
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