海岸带边坡防浪林消浪理论与实验研究

Analytical Solution and Physical Model Test of Wave Protection Forest on Coastal Zones

在海岸边坡上种植防浪林是一种新的护岸形式,应用理论分析和模型实验对其进行了初步研究。建立波浪在斜坡上传播的控制方程及边界条件,应用摄动理论求解非线性解,得到了一阶精确解和二阶近似解。在模型实验中,确定几何比尺为1∶10,选取桧柏树枝作为防浪林模型,根据量纲分析,确定的主要影响因素是海岸边坡坡度、波高、波周期、水深与防浪林树宽。实验结果表明,防浪林宽度与岸坡坡度对消浪效果影响较大。

Planting on the bank to attenuate waves is a new method to protect the embankment. Through mathematic analysis and physic model test, the effect of forest on waves of seashore was studied in this paper. With implication of perturbation theory, the non-linear analytical solution of the partial differential equation and boundary condition for waves prorogation on slope was established. According to the actual dimension of waves and laboratory equipment, the scale 1：10 was selected in the physical model test. Some suitable branches of Chinese juniper was made as model of mangrove. Through the dimensional analysis, the major influencing factors was determined, such as the slope, waves height, waves period, water depth and forest width. The experiment result indicates that the slope and the forest width have the most effect on attenuating waves.