| 不平衡输沙含沙量垂线分布研究 |
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| 引用本文： | 韩其为,陈绪坚,薛晓春.不平衡输沙含沙量垂线分布研究[J].水科学进展,2010,21(4):512-523. |
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| 作者姓名： | 韩其为 陈绪坚 薛晓春 |
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| 作者单位： | 1.中国水利水电科学研究院泥沙研究所, 北京, 100048; |
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| 基金项目： | 公益性行业科研专项经费资助项目 |
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| 摘 要： | 采用理论推导和数值计算的方法,进一步研究了不平衡输沙条件下的含沙量垂线分布,首次提出了非饱和泥沙通量的概念及其表达式,推导了不平衡输沙含沙量垂线分布的理论解,包括不平衡输沙含沙量垂线分布指数公式和幂函数公式,以及相应的底部含沙量确定方法。同时利用差分法求解剖面二维扩散方程,得到了不同参数的不平衡输沙含沙量垂线分布。其结果除少数误差稍大外,两种途径得出的含沙量垂线分布彼此符合良好。
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| 关 键 词： | 不平衡输沙 含沙量 垂线分布 非饱和泥沙 扩散方程 数值解 |
| 收稿时间： | 2009-09-07 |
On the vertical distribution of sediment concentration in non-equilibrium transportation |
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| HAN Qi-wei,CHEN Xu-jian,XUE Xiao-chun.On the vertical distribution of sediment concentration in non-equilibrium transportation[J].Advances in Water Science,2010,21(4):512-523. |
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| Authors: | HAN Qi-wei CHEN Xu-jian XUE Xiao-chun |
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| Institution: | 1.China Institute of Water Resources and Hydropower Research, Beijing 100048, China;2.Beijing University of Aeronautics and Astronautics, Beijing 100191, China |
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| Abstract: | The vertical distribution of suspended load concentration is one of the key theoretical components in sediment research.The vertical distribution of sediment concentration in non-equilibrium transportation is further studied using methods of theoretical derivation and numerical calculation in this article.A new concept of non-saturation sediment flux is proposed together with the derived mathematical expression.The theoretical solutions of vertical distribution of sediment concentration in non-equilibrium transportation are deduced,which include the exponential formula and power formula(Rouse formula),as well as the method of sediment concentration on bottom.At the same time, the two-dimensional diffusion equations on longitudinal section are resolved using the finite difference method.The arithmetical solutions of vertical distribution of sediment concentration in non-equilibrium transportation are worked out with different parameters,and coincident with the theoretical results from formulas except in a few cases with small errors. |
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| Keywords: | sediment in non-equilibrium transportation sediment concentration vertical distribution sediment flux in non-saturation diffusion equations numerical solution |
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