DefinePK

Abstract

Waves that propagate through a form of porous breakwater structure below the water surface will be transmitted. The structural model of the porous breakwater is designed with a position perpendicular to the wave arrival direction at the wave generating flume, which functions in addition to reducing the incident waves energy and minimizing wave reflection. This study aims to determine the effect of variations in the length of the pipe model, the diameter of the pipe model and the height of the pipe model structure. Laboratory experiment research by varying the length of the pipe arranged in such a way that the friction plane hole in the model is in the same direction as the incoming wave with variations in water depth (d_1=30 cm; d_2=33 cm and d_3=36 cm) and variations in pipe diameter (D_1 = 15 cm, D_2 = 10 cm and D_3 = 7,5 cm). The results showed that the structures length and height with a much smaller diameter decrease the transmission wave, and the reflection wave is relatively constant.