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An efficient method of estimating sediment discharge in rivers.

机译：一种估算河流中泥沙流量的有效方法。

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摘要

Estimation of sediment discharge by conventional measurement methods is expensive and labor intensive. An efficient method that can be used to estimate the average cross-sectional sediment concentration and discharge in a river channel was developed. This method relies on the Chiu's velocity and sediment distribution models, which are based on the probability concept. The advantage of this approach compared to conventional methods is that the velocity and sediment concentration can be accurately estimated over the entire water depth, from the channel bed to the water surface. This method requires determining the location of a vertical (y-axis), where the maximum velocity of the entire cross section occurs. The correlation between the mean sediment concentration on each vertical and the cross-sectional mean concentration was analyzed. It led to the conclusion that sediment sampling should be conducted on y-axis at a point where sediment concentration is equal to the mean concentration on y-axis. A family of plots for selection of the sampling location was developed. Finally, a method based on Chiu's sediment transport model and data analysis was developed to estimate the mean sediment concentration in a channel section. This cross-sectional mean sediment concentration can be used to calculate the sediment discharge.
机译：用常规的测量方法估算沉积物的排放是昂贵且费力的。开发了一种可用于估算河道平均断面沉积物浓度和流量的有效方法。该方法依赖于Chiu的速度和泥沙分布模型，该模型基于概率概念。与常规方法相比，此方法的优势在于，可以准确地估算从通道床到水面的整个水深的速度和沉积物浓度。此方法需要确定垂直方向（y轴）的位置，在该位置会出现整个横截面的最大速度。分析了每个垂直方向的平均沉积物浓度与横截面平均浓度之间的相关性。得出的结论是，应在y轴上的沉积物采样等于y轴上的平均浓度的点上进行沉积物采样。开发了一系列用于选择采样位置的样地。最后，建立了一种基于Chiu泥沙输送模型和数据分析的方法来估算河道断面的平均泥沙浓度。该横截面平均沉积物浓度可用于计算沉积物流量。

著录项

  • 作者

    Emdad, Hadi.;

  • 作者单位

    University of Pittsburgh.;

  • 授予单位 University of Pittsburgh.;
  • 学科 Engineering Civil.; Hydrology.
  • 学位 Ph.D.
  • 年度 2004
  • 页码 172 p.
  • 总页数 172
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;水文科学（水界物理学）;
  • 关键词

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