Mangroves have been proven to be effective in storm surge attenuation but it remains an important challenge to accurately quantify such bio-shielding effects using numerical simulations, as it is very difficult to comprehensively represent the ecological characteristics of mangroves at both large and small scales. In this study, a numerical method is developed and implemented in the Coastal and Estuarine Storm Tide (CEST) model in order to investigate the attenuation effect of mangroves on storm surge. This numerical method employs an improved drag force formula, which involves the development of new abstract tree models and use of a landscape scale data map of mean mangrove tree height for the study area. The storm surge observed in the South Florida mangrove zone caused by Hurricane Wilma (2005) is used to verify the numerical model. The numerical results indicate a maximum surge of approximately 4.3 m, and a decay rate of peak storm surge height of approximately 18 cm/km across the areas with a mixture of mangrove islands and open water, and nearly 24 cm/km through areas with dense mangrove forest. Results also show that short mangroves ($<$ 4 m) can outperform tall mangroves on surge attenuation when the water depth is low ($<$ 4 m). Extensive comparisons are also made with the conventional Manning coefficient based method that incorporates the mangrove drag force into bed friction; it is found that the current method predicts better inundation extents for Wilma (2005), hence a more accurate quantification of the attenuation of storm surge due to mangroves.

红树林已被证明对风暴潮衰减有效，但使用数值模拟准确量化这种生物屏蔽效应仍然是一个重要挑战，因为很难在大尺度和小尺度上全面表示红树林的生态特征。在这项研究中，在沿海和河口风暴潮 (CEST) 模型中开发并实施了一种数值方法，以研究红树林对风暴潮的衰减效应。该数值方法采用改进的阻力公式，包括开发新的抽象树模型和使用研究区平均红树林高度的景观比例数据图。利用飓风威尔玛 (2005) 在南佛罗里达红树林区观测到的风暴潮来验证数值模型。数值结果表明，在红树林岛屿和开阔水域混合的地区，最大风暴潮高度约为 4.3 m，峰值风暴潮高度衰减率约为 18 cm/km，通过密集区的衰减率约为 24 cm/km。红树林。结果还表明，矮红树林 ($<$ 4 m) 在水深较低时 ($<$4 米）。还与传统的基于曼宁系数的方法进行了广泛的比较，该方法将红树林拖曳力纳入床层摩擦；发现当前的方法可以更好地预测 Wilma (2005) 的淹没程度，因此可以更准确地量化由于红树林引起的风暴潮衰减。