THREE-DIMENSIONAL PHYSICAL MODELLING OF SINGLE CHAMBER SKIRT BREAKWATER (SCSB)

Abstract

The single chamber skirt breakwater (SCSB) is a skirt-type breakwater consisting of piles at the lower part and a chamber skirt without porosity in the upper part of the structure. Three-dimensional physical modeling is conducted in the wave basin to measure the effectiveness of the skirt-type breakwater by examining the transmission coefficient (CT) and the reflection coefficient (CR). In addition, the relationship between environment (kh, HI/L) and structure (s/h) independent variables with the transmission and reflection coefficient are investigated. The physical modeling concluded that the structure's transmission coefficient in the intermediate-depth water region (kh between 0.32‒1.11) is 0.37‒0.62 and the reflection coefficient is 0.33‒0.49. On the other hand, in the shallow water region, kh is in the range of 0.21‒0.30, the transmission coefficient is 0.50‒0.56, and the reflection coefficient is in the range of 0.36‒0.48. Therefore, it is concluded that the SCSB is effective in intermediate-depth water and not in shallow-water regions.