Abstract Salt marshes are a common feature in coastal regions and have been noted for their ability to attenuate wave energy, providing an important first line of coastal defense. Marsh plants usually consist of multiple leaves distributed along a central stem. This paper constructed a model predicting wave force on a marsh plant by modeling the reconfiguration of both the leaves and stem in waves. The individual leaf and stem models and the full plant model were validated with experimental measurements of drag and plant motion using both live and dynamically-similar model plants under a range of wave conditions. Although the leaves exhibited greater reconfiguration than the stem, they contributed more than 70% of the plant drag. Plant reconfiguration produced a drag force that had a weaker than quadratic dependence on wave velocity. A simplified model, which combines scaling laws for the stem and individual leaves, is proposed and validated. Wave drag on a variety of marsh species with different morphology and rigidity were estimated and compared.

中文翻译：

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波浪诱导的重新配置和拖累沼泽植物

摘要 盐沼是沿海地区的一个共同特征，以其衰减波浪能的能力而著称，是重要的海岸防御第一线。沼泽植物通常由沿中央茎分布的多片叶子组成。本文通过对波浪中叶子和茎的重新配置进行建模，构建了一个预测沼泽植物波浪力的模型。单个叶和茎模型以及完整的植物模型通过在一系列波浪条件下使用活的和动态相似的模型植物对阻力和植物运动的实验测量进行验证。尽管叶子比茎表现出更大的重构，但它们贡献了超过 70% 的植物阻力。植物重新配置产生的阻力对波速的依赖比二次依赖弱。提出并验证了一个简化模型，该模型结合了茎和单个叶子的缩放规律。对具有不同形态和刚度的各种沼泽物种的波浪阻力进行了估计和比较。