Vegetation provides habitat and nature-based solutions to coastal flooding and erosion, drawing significant interest in its restoration, which requires an understanding of sediment transport and retention. Laboratory experiments examined the influence of stem diameter and arrangement on bedload sediment transport by considering arrays of different stem diameter and mixed diameters. Bedload transport rate was observed to depend on turbulent kinetic energy, with no dependence on stem diameter, which was shown to be consistent with the impulse model for sediment entrainment. Existing predictors of bedload transport for bare beds, based on bed shear stress, were recast in terms of turbulence. The new turbulence-based model predicted sediment transport measured in model canopies across a range of conditions drawn from several previous studies. A prediction of turbulence based on biomass and velocity was also described, providing an important step toward predicting turbulence and bedload transport in canopies of real vegetation morphology.

中文翻译：

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湍流决定了植被通道中的底泥运输，而不依赖于茎直径和排列

植被为沿海洪水和侵蚀提供栖息地和基于自然的解决方案，引起人们对其恢复的极大兴趣，这需要了解沉积物的运输和保留。实验室实验通过考虑不同茎直径和混合直径的排列，研究了茎直径和排列对床载泥沙输移的影响。观察到底泥输送率取决于湍流动能，而不取决于茎直径，这表明与沉积物夹带的脉冲模型一致。现有的基于床层剪切应力的裸床床荷载传输预测因子根据湍流进行了重新计算。新的基于湍流的模型预测了在先前几项研究中得出的一系列条件下在模型冠层中测量的沉积物迁移。