论文标题
海浪中红树林内湍流动能的实验室研究
Laboratory Study of Turbulent Kinetic Energy within Mangrove Forest under Waves
论文作者
论文摘要
设定了实验室研究，以研究红树林森林内的流动结构和湍流动能（$ tke $），考虑到柔性檐篷和在各种波浪条件下的刚性茎。檐篷和茎对湍流产生有不同的影响。树冠尺度上的柔性叶子可以促进$ tke $的耗散，刚性茎刻度有助于产生湍流。重要的是，$ tke $随植被带来的差异，$Δtke$随波频率而变化，无冠层和无植被的上层峰值为0.833 Hz，但随着茎尺度的波频率而增加。此外，每个茎密度的$ {u_ {w，rms}}^2 $单调增加了红树林的$ tke $。这项研究提出了一个柔性叶子和刚性茎的作用，为$ tke $预测的修改模型。此外，$ tke/{u_ {w，rms}}^2 $与Wave Revission（$ {a_w} $）与STEM间距（$ s $），$ {a_w} $/$ s $的比率（$ {a_w} $）的比例很好 规模。这种经验关系可以是红树林内$ TKE $的预测指标。此外，考虑到通过植被和生产$ TKE $的波能量耗散之间的规模，第三型模型在红树林中得到了验证，并预测了很好的预测。
Laboratory study was set out to investigate the flow structure and turbulent kinetic energy ($TKE$) within mangrove forest considering flexible canopies and rigid stems under various wave conditions. Canopies and stems have different effects on turbulence generation. The flexible leaves in canopy scale can promote the dissipation of $TKE$ and the rigid stem scale contribute to the generation of turbulence. Importantly, the difference of $TKE$ with and without vegetation, $ΔTKE$ varied with wave frequency and peaked at 0.833 Hz for the canopy and vegetation-free upper layer, but increased with wave frequency in stem scale. Moreover, $TKE$ in mangrove forest increased monotonically with ${u_{w,RMS}}^2$ for each stem density. This study proposed a modified model for the $TKE$ prediction within canopy scale considering the role of flexible leaves and rigid stems together. Besides, $TKE/{u_{w,RMS}}^2$ presented a good correlation with the ratio of wave excursion (${A_w}$) to stem spacing ($S$), ${A_w}$/$S$ and declined rapidly with ${A_w}$/$S$ especially when ${A_w}$/$S$ <0.1 for both stem and canopy scale. This empirical relationship can be a predictor for $TKE$ within mangrove forest. Further, considering the scale between wave energy dissipation by vegetation and production of $TKE$, the third model was validated in mangrove forest and predicted well.
