Species specific hydrodynamic characterization is essential for assessing the suitability of various types of mangroves in coastal protection as the dissipation of wave energy within the mangroves is governed primarily by various aspects which are specific to the species to which they belong. In the present study a specific mangrove species was selected and its wave attenuation characteristics were studied with the help of scaled physical models under controlled wave and vegetation conditions in a laboratory wave flume. The plant was initially identified as Rhizophora Mucronata and the scaled models prepared had the same biomechanical properties as that of the parent plant. Effect of root soil was incorporated in scaled models as bottom friction. Wave heights were measured after the forest models to evaluate the wave attenuation. It was found that wave heights were following the exponential decay equation of Kobayashi et al. (1993) except for the cases which have incorporated bottom friction. For such cases exponential decay equation was modified by incorporating a new parameter ‘d/D₅₀’. Drag coefficients (C_D), characteristic of the species were also determined without incorporating and with incorporating the effect of bottom friction of root soil. It is seen that drag coefficients are following an inverse relation with non-dimensional numbers (R_e and KC). Empirical relations were developed between C_D and a modified Keulegan Carpenter number (modified considering mangrove root submergence and mean particle size) for predicting the drag coefficients specific to Rhizophora Mucronata species for a variety of wave and water level conditions.

物种特定的水动力特性对于评估各种类型的红树林在海岸保护中的适用性至关重要，因为红树林中的波能耗散主要受与其所属物种特定的各个方面的控制。在本研究中，选择了一种特定的红树林物种，并借助比例物理模型在受控波浪和植被条件下，在实验室波浪水槽中研究了其波浪衰减特性。该植物最初被鉴定为Rhizophora Mucronata所制备的比例模型具有与亲本植物相同的生物力学特性。将根土壤的影响作为底部摩擦纳入比例模型中。在森林模型之后测量波高以评估波衰减。发现波高遵循Kobayashi等人的指数衰减方程。（1993年），但包括底部摩擦的情况除外。对于这种情况，指数衰减方程通过合并新参数“ d / D ₅₀ ”进行了修改。还确定了该物种特征的阻力系数（C _D），而没有考虑根土壤的底部摩擦的影响。可以看出，阻力系数与无量纲数（R_e和KC）。在C _D和修正的Keulegan Carpenter数（考虑到红树林的根淹没和平均粒径而修改）之间建立了经验关系，以预测在各种波浪和水位条件下特定于Mrizophora Mucronata物种的阻力系数。