Coastal vegetation is capable of decreasing wave run-up. However, because of regrowth, decay or man-made damage, coastal vegetation is always distributed in patches, and its internal distribution is often non-uniform. This study investigates the effects of patchy vegetation on solitary wave run-up by using a numerical simulation. A numerical model based on fully nonlinear Boussinesq equations is established to simulate the wave propagation on a slope with patchy vegetation. By using the model, the process of solitary wave run-up attenuation due to patchy vegetation is numerically analysed. The numerical results reveal that patchy vegetation can considerably attenuate the wave run-up in an effective manner. In addition, high-density patched vegetation can attenuate the solitary wave run-up more effectively than low-density patched vegetation can. For the same density, patchy vegetation with a uniform distribution has a better attenuation effect on wave run-up compared to that of patchy vegetation with a non-uniform distribution.

中文翻译：

---

斑片植被对孤立波上升衰减的数值研究

沿海植被能够减少波浪上升。然而，由于再生长，腐烂或人为破坏，沿海植被总是散布在一块，其内部分布常常是不均匀的。本研究通过数值模拟研究了斑驳植被对孤波上升的影响。建立了基于完全非线性的Boussinesq方程的数值模型，以模拟波在植被斑驳的斜坡上的传播。利用该模型，对斑块状植被引起的孤立波上升衰减过程进行了数值分析。数值结果表明，斑驳的植被可以有效地减弱波浪的上升。此外，高密度的贴片植被比低密度的贴片植被能够更有效地衰减孤波上升。