Abstract The differences between beaches completely composed of sand and beaches underlain or fronted seaward by hard structures have been well addressed in the current literature. Considering their morphological and morphodynamic particularities, Trenhaile (2004) modeled the accumulation and dynamics of beaches on shore platforms, on mesotidal and macrotidal coast. Although, this model had not been verified or tested in the field, it can be useful to understand coastal geomorphology. Therefore, this study aims to apply the Trenhaile (2004) model to beaches on horizontal shore platforms, located on the microtidal coast of Espirito Santo (Brazil), and validate it using local data. For this, the morphological and morphodynamic particularities of the studied beaches were considered when applying and interpreting the model results. Besides the Trenhaile (2004) model variables, the role of wave runup was considered in the upward growth of the berm and then in the beach height. The model results and field data showed that the gradients and elevations of shore platforms in the study area are suitable to form the beaches while wider shore platforms seem to contribute to the development of wider beaches. The platforms in the study area also influence accommodation space, cross-shore sediment exchanges and beach mobility. Field data was used to test the applicability of Trenhaile's (2004) model in the study area. The model was found to be a potentially useful tool in coastal management helping to understand coastal geomorphology.

中文翻译：

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巴西微潮东南海岸水平岸台上海滩的发育和形态动力学

摘要 完全由沙子组成的海滩与硬质结构下伏或面向海的海滩之间的差异在当前的文献中已经得到很好的解决。考虑到它们的形态学和形态动力学特性，Trenhaile (2004) 模拟了海岸平台、中潮汐和大潮海岸上海滩的堆积和动态。尽管该模型尚未在现场进行验证或测试，但它对于了解沿海地貌非常有用。因此，本研究旨在将 Trenhaile (2004) 模型应用于位于 Espirito Santo（巴西）微潮海岸的水平岸平台上的海滩，并使用当地数据对其进行验证。为此，在应用和解释模型结果时考虑了所研究海滩的形态和形态动力学特性。除了 Trenhaile (2004) 模型变量之外，波浪爬高在护堤向上增长和海滩高度中的作用也被考虑在内。模型结果和现场数据表明，研究区岸边平台的坡度和高程适合形成海滩，而较宽的岸边平台似乎有助于形成较宽的海滩。研究区的平台也影响住宿空间、跨岸沉积物交换和海滩流动。现场数据被用来检验 Trenhaile (2004) 模型在研究区的适用性。该模型被认为是有助于了解海岸地貌的海岸管理的潜在有用工具。模型结果和现场数据表明，研究区岸边平台的坡度和高程适合形成海滩，而较宽的岸边平台似乎有助于形成较宽的海滩。研究区的平台也影响住宿空间、跨岸沉积物交换和海滩流动。现场数据被用来检验 Trenhaile (2004) 模型在研究区的适用性。该模型被认为是有助于了解海岸地貌的海岸管理的潜在有用工具。模型结果和现场数据表明，研究区岸边平台的坡度和高程适合形成海滩，而较宽的岸边平台似乎有助于形成较宽的海滩。研究区的平台也影响住宿空间、跨岸沉积物交换和海滩流动。现场数据被用来检验 Trenhaile (2004) 模型在研究区的适用性。该模型被认为是有助于了解海岸地貌的海岸管理的潜在有用工具。跨岸沉积物交换和海滩流动。现场数据被用来检验 Trenhaile (2004) 模型在研究区的适用性。该模型被认为是有助于了解海岸地貌的海岸管理的潜在有用工具。跨岸沉积物交换和海滩流动。现场数据被用来检验 Trenhaile (2004) 模型在研究区的适用性。该模型被认为是有助于了解海岸地貌的海岸管理的潜在有用工具。