Studi Exsperimen Efektivitas Breakwater Tipe Batu Pecah Terhadap Redaman gelombang

Raja Kecik Beach in Muntai Barat has experienced significant coastal erosion due to strong wave action and soft, easily eroded soil. To address this issue, a rubble mound reakwater was constructed as a form of shoreline protection. This study aims to evaluate the effectiveness of the rubble mound breakwater in reducing wave energy. Laboratory experiments were conducted using physical scale models, with variations in water levels (normal and high tide) and slope nclinations (1:1.67 and 1:2.5). The results show that the breakwater erforms effectively under normal tidal conditions, with wave transmission coefficients (Kt) ranging from 0.33 to 0.40. owever, under high tide, its performance decreases gnificantly, as Kt increases to 0.77 and 0.89. The wave un-up is also influenced by the slope of the breakwater; entler slopes result in lower run-up values. The highest run-up was recorded at a 1:1.67 slope with 1.89 m, while a 1:2.5 slope resulted in only 1.26 m. These findings suggest that optimizing both the height and slope of the breakwater based on maximum tidal conditions is essential to enhance its effectiveness in dissipating wave energy.