对M. Abdolahpour等人
Comment on "The wave-driven current in coastal canopies" by M. Abdolahpour et al
摘要：
过去十年的实验室和实地测量表明，在淹没植被冠层中存在着强烈的波浪驱动的平均流。Luhar等人（2010年）认为，这种平均流类似于裸露海床上波浪边界层中产生的流动，并开发了一个简单的能量和动量平衡模型来预测其大小。然而，该模型预测平均电流的大小不取决于冠层空间密度，这与Abdolahpour等人（2017）在最近的实验室实验中所做的测量不一致。受观测结果的启发，波驱动的平均流在冠层界面最明显，Abdolahpour等人（2017）对其起源提出了另一种解释：它是由冠层阻力产生的轨道运动的垂直不均匀性驱动的。这种不均匀性可以引起不完整的粒子轨道附近的冠层界面和拉格朗日平均流类似于斯托克斯漂流的方向上的波传播。由这种物理洞察力和维度分析指导的模型能够生成更准确的预测。本文旨在调和这两种不同的模式波驱动的平均流淹没檐篷。
英文摘要：
Laboratory and field measurements made over the past decade have shown the presence of a strong wave-driven mean current in submerged vegetation canopies. Luhar et al. (2010) suggested that this mean current is analogous to the streaming flow generated in wave boundary layers over bare beds, and developed a simple energy and momentum balance model to predict its magnitude. However, this model predicts that the magnitude of the mean current does not depend on canopy spatial density, which is inconsistent with the measurements made by Abdolahpour et al. (2017) in recent laboratory experiments. Motivated by observations that the wave-driven mean flow is most pronounced at the canopy interface, Abdolahpour et al. (2017) proposed an alternate explanation for its origin: that it is driven by the vertical heterogeneity in orbital motion created by canopy drag. Such heterogeneity can give rise to incomplete particle orbits near the canopy interface and a Lagrangian mean current analogous to Stokes drift in the direction of wave propagation. A model guided by this physical insight and dimensional analysis is able to generate much more accurate predictions. This comment aims to reconcile these two different models for the wave-driven mean flow in submerged canopies.
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