近岸植被对台风浪传播影响的数值模拟分析

以广东湛江红树林海岸为研究区域，使用Holland台风模型，选择具有代表性的201213号台风启德为天气背景，基于SWAN模式采用三重嵌套方法模拟了近岸台风浪的传播运动，在模型验证的基础上，进一步在湛江沿岸布置植被，建立了近岸植被水域台风浪传播运动的数值模型，并分析了近岸植被对台风浪传播变形的影响。结果表明，台风浪在近岸植被区传播时，随着植被区宽度、植被高度和植被密度的增加，台风浪传播中的波高衰减增大，植被对台风浪的衰减作用愈剧烈。

Numerical study for typhoon wave propagation in vegetation field

To simulate the propagation of typhoon wave in the coastal sea area, the mangrove coast of Zhanjiang was chosen as the study area, the Typhoon KAI-TAK illustrated by the Holland typhoon model was selected as the meteorological background, and the three level nested grids were set to establish the SWAN model. Based on the simulated results of typhoon wave, the numerical model for typhoon wave propagation in vegetation field was built by arranging vegetation along Zhanjiang coast, furthermore, the vegetation impacts on typhoon wave propagation were analyzed by the model. The results showed that the wave height's attenuation due to vegetation increases with the increase of plant height and plant density, as well as the width of plant area.