ENTRAINMENT OF BED SEDIMENT INTO SUSPENSION
ENTRAINMENT OF BED SEDIMENT INTO SUSPENSION
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DOI：
10.1061/(asce)0733-9429(1991)117:4(414
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发表时间：
1991-04-01
期刊：
影响因子：
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通讯作者：
PARKER, G
中科院分区：
文献类型：
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作者：
GARCIA, M;PARKER, G
对于预测悬浮沉积物的参考近床浓度或非粘性床沉积物进入悬浮液的夹带率，文献中存在大量明显相互矛盾的关系。 大多数这些关系是针对统一材料开发的。 在本文中，将七种这样的关系与一组常见的实验数据进行了比较，这些实验数据可以直接测量近床浓度。 Van Rijn 以及 Smith 和 McLean 提出的关系被发现效果最好。 使用相同的实验数据开发了具有类似预测能力的均匀材料的新关系。 新的关系被推广到借助现场数据来处理沉积物混合物。 该概括解释了由于存在不同尺寸的颗粒而产生的隐藏效应。 针对独立现场数据集的测试表明，经验拟合可以为覆盖不均匀材料的床提供合理的泥沙夹带系数。
The literature abounds with apparently conflicting relations for predicting the reference near-bed concentration of suspended sediment or the entrainment rate of noncohesive bed sediment into suspension. Most of these relations have been developed for uniform material. In this paper, seven such relations are compared against a common set of experimental data for which direct measurements of near-bed concentration are available. The relations put forward by Van Rijn and by Smith and McLean are found to perform best. A new relation for uniform material, having similar predictive capabilities, is developed using the same experimental data. The new relation is generalized to handle sediment mixtures with the aid of field data. The generalization accounts for the hiding effect due to the presence of grains of different sizes. A test against an independent field data set indicates that the empirical fit can provide reasonable of the sediment entrainment coefficient for beds covered with nonuniform material.