The main objective of this research is to present an improved and more accurate formula to estimate the reflection coefficient (K_R) for rubble mound breakwaters. Physical model tests were performed for this purpose and existing data was also considered. The evaluation of existing prediction formulas for K_R based on the Iribarren number (ξ) shows that the scatter in the experimental results increases with increasing ξ. This is caused by the wavelength having greater influence on the reflection than the wave height and thus the use of the wave steepness is inappropriate. The influence of potentially dimensionless parameters on the wave reflection from literature was analysed. The major dimensionless parameters were found to be the relative water depth (h/L) and the structure front slope angle (α). Hence, a formula to estimate wave reflection for rubble mound breakwaters based on these two parameters is proposed.

本研究的主要目的是提出一种改进的、更准确的公式来估计碎石堤防波堤的反射系数 ( K _R )。为此目的进行了物理模型测试，并考虑了现有数据。基于 Iribarren 数 ( ξ )的现有K _R预测公式的评估表明，实验结果的分散性随着ξ 的增加而增加. 这是由于波长对反射的影响大于波高，因此使用波陡度是不合适的。分析了潜在无量纲参数对文献中波反射的影响。主要的无量纲参数是相对水深（h / L）和结构前倾角（α）。因此，提出了基于这两个参数的碎石堤防波堤波浪反射估算公式。