| 天然悬移质泥沙粒径分布及混合平均沉速的计算 |
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| 引用本文： | 赵连军,谈广鸣,韦直林.天然悬移质泥沙粒径分布及混合平均沉速的计算[J].中国农村水利水电,2004(9):40-42. |
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| 作者姓名： | 赵连军 谈广鸣 韦直林 |
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| 作者单位： | 水资源与水电工程科学国家重点实验室,武汉大学,湖北,武汉,430072 |
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| 基金项目： | 国家自然科学基金项目 (50 2 390 4 0 ) |
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| 摘 要： | 通过对处于悬浮临界状态的泥沙受力情况分析，从理论推导出了悬移质泥沙粒径的分布表达式；在此基础上，建立了天然非均匀沙混合平均沉速的计算公式，并对天然实测泥沙特征粒径进行了分析研究，建立了表征悬沙级配非均匀程度的参数d50／dcp随泥沙组成粗细程度及含沙量变化的关系式。采用大量实测资料对混合平均沉速及d50／dcp的计算公式进行了验证，计算值与实测值吻合较好。
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| 关 键 词： | 泥沙级配 悬移质泥沙 混合平均沉速 非均匀程度 |
| 文章编号： | 1007-2284(2004)09-0040-03 |
| 修稿时间： | 2003年11月21 |
Calculation of Gradation Distribution and Average Mixed Deposition Rate of Suspended Sediment in Natural River |
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| ZHAO Lian-jun,TAN Guang-ming,WEI Zhi-lin.Calculation of Gradation Distribution and Average Mixed Deposition Rate of Suspended Sediment in Natural River[J].China Rural Water and Hydropower,2004(9):40-42. |
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| Authors: | ZHAO Lian-jun TAN Guang-ming WEI Zhi-lin |
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| Abstract: | Through analysis of stress status of sediment at the critical suspended condition, the authors have educed theoretically a gradient distribution formula of suspended sediment. On this basis, a formula of average mixed deposition rate of natural non-homogeneous sediment has been established. By analysis of naturally observed sediment typical gradation, the relationship between the heterogeneous degree parameter d50/dcp and the gradation and content of sediment is set up. Through comparison of the calculated average mixed deposition rate and the parameter d50/dcp with those observed, the formulas are validated, and the results calculated agree with those observed very well. |
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| Keywords: | sediment gradation suspended sediment mixed average deposition rate heterogeneous degree |
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