Modelling beach-structure interaction using a Heaviside technique: application and validation
Modelling beach-structure interaction using a Heaviside technique: application and validation
复制标题
使用 Heaviside 技术对海滩结构相互作用进行建模：应用和验证
DOI：
10.2112/si65-070.1
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发表时间：
2013
影响因子：
--
通讯作者：
D. Reeve
中科院分区：
文献类型：
--
作者：
Antonios Valsamidis;Yuzhi Cai;D. Reeve
摘要：Valsamvet，A.，蔡玉，里夫，D.E.，2013.模拟海滩结构的相互作用，使用Heaviside技术：应用和验证在这项研究中，一个分析的解决方案，基于Heaviside技术，开发模型的海岸线演变在附近的丁坝由于随机序列的波浪。英国威尔士Borth的海滩被用作案例研究。一个波浪的时间序列，涵盖了大约12年的时间周期，被用来测试最近建造的海岸防御计划的性能。转换的波浪时间序列从近海到近岸进行了半经验的程序。三个不同的波浪破碎公式被独立地应用到波浪模型中，并研究了它们对随后的海岸线演变的影响。此外，还比较了三种不同的沿岸输运公式。这些是CERC，Kamphuis和Bayram公式。结果表明，CERC公式预测的泥沙输移量显着增加，因此侵蚀的丁坝的下漂移侧，而基于Kamphuis和Bayram公式的模型给出了可比的结果。所有的结果表现出很强的敏感性的时间分辨率的强迫。最后，对波浪破碎的处理也有一定的敏感性。
ABSTRACT Valsamidis, A., Cai, Y., Reeve, D.E., 2013. Modelling beach-structure interaction using a Heaviside technique: application and validation In this study, an analytical solution, based on a Heaviside technique, is developed to model the shoreline evolution in the vicinity of a groyne due to a random sequence of waves. The beach at Borth, Wales, UK was used as a case-study. A wave time-series covering a time period of about 12 years, was used to test the performance of a recently constructed coastal defence scheme. Transformations of the wave time-series from offshore to nearshore were performed using a semi-empirical procedure. Three different wave breaking formulae were independently applied to the wave model, and their effects to the consequent shoreline evolution were investigated. In addition, three different longshore transport formulae were compared. These were the CERC, the Kamphuis and the Bayram formulae. Results showed that the CERC formula predicted a significantly greater amount of sediment transport and hence erosion on the downdrift side of the groyne while the models based on Kamphuis and the Bayram formulae gave comparable results. All the results exhibited a strong sensitivity to the temporal resolution of the forcing. Finally, some sensitivity to the treatment of wave breaking was found.