论文标题
红树林的波浪衰减实验室研究
Laboratory Study of Wave Attenuation by Mangrove Forest
论文作者
论文摘要
沿海植被可以消除风暴潮和海啸的能量，这是沿海保护的自然障碍。进行了波形 - 膜相互作用的实验研究，以评估植被（WDV）的波浪衰减效率。特别是，模型红树林由柔性树冠和刚性茎组成，以更好地模仿天然的根茎。它考虑了各种波浪条件的效果，包括入射波高度（$ {h_i} $）和波周期（$ t $）以及植物特征，包括浸没比（$α$）和茎密度（$ n $）。然后，应用指数波衰减系数（$ {k_i} $）来确定WDV的性能。它表明，较大的$ {h_i} $，$α$和较小的$ t $引起的波浪衰减。为了量化WDV，提出了一个新的分析模型，考虑到沿植被沿茎的排列和波浪参数的变化。此外，该模型校准了红树林的阻力系数，$ {C_D} $进行了分析，并与先前的型号进行了比较。基于此模型，$ {C_D} $与某些非二维参数之间的关系，例如Reynolds编号，$ {\ Mathop {\ rm re} \ nolimits} $，Keulegan-Carpenter编号，$ KC $和URSELL编号，$ {u_r} $，以评估和预测波浪衰变。特别是，它显示出比以前模型更好的相关关系，并且预测的结果与实验数据显示了很好的一致性。
Coastal vegetation can dissipate the energy of storm surge and tsunami, which serves a natural barrier for coastal protection. The experimental study of waves-mangroves interaction was carried out to evaluate the efficiency of wave attenuation by vegetation (WDV). In particular, the model mangrove consisted of a flexible canopy and a rigid stem to imitate natural Rhizophora better. It considered the effect of various wave conditions including incident wave height (${H_i}$) and wave period ($T$) as well as plant characteristics including submergence ratio ($α$) and stem density ($N$), respectively. Then, the exponential wave decay coefficient (${K_i}$) was applied to determine the performance of WDV. It showed that larger ${H_i}$, $α$ and smaller $T$ induced greater wave decay. To quantify WDV, a new analytical model was proposed considering the change of stem arrangement and wave parameters along the vegetation. Further, the drag coefficient, ${C_D}$ of mangrove forest was analytical calibrated by this model, and made a comparison with the previous model. Based on this model, the relationships between ${C_D}$ and some non-dimensional parameters, e.g. Reynolds number, ${\mathop{\rm Re}\nolimits} $ , Keulegan-Carpenter number, $KC$ and Ursell number, ${U_r}$ were established to evaluate and predict the wave decay. Especially, it showed a better correlation relationship than the previous model, and the predicted results showed a good agreement with the experimental data.
