The present paper aims to investigate the transport of suspended sediment in an open channel turbulent flow. The method of moments is used to solve the unsteady two-dimensional suspended sediment transport equation where the moment equations are evaluated using a standard finite difference implicit scheme. The distribution of concentration is obtained using the Hermite polynomial representation of central moments. The solution exists for arbitrary form of eddy diffusivity and in contrast to other existing works, the present model considers the most general boundary condition at the channel bed which may be absorbing, reflecting or both. According to such nature of channel bed, the transport process has been distinguished into two phases, viz., suspension phase and deposition phase together with re-entrainment of particles. The model in its present form can be well applicable for sediment transportation in environmental processes.

中文翻译：

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受沉积和再夹带影响的明渠流中不稳定的二维悬浮泥沙输运

本文旨在研究悬浮泥沙在明渠湍流中的输运。矩法用于求解非定常二维悬浮泥沙输运方程，其中使用标准有限差分隐式格式计算矩方程。使用中心矩的 Hermite 多项式表示获得浓度分布。该解决方案适用于任意形式的涡流扩散率，与其他现有工作相比，本模型考虑了通道床处最一般的边界条件，它可能是吸收、反射或两者兼而有之。根据通道床的这种性质，将输送过程分为两个阶段，即悬浮阶段和沉积阶段以及颗粒的再夹带。