Breakwater is a structure that builds parallel to the coast,and located within some distance from the coastline.The breakwater that is currently and widely used is Rubble Mound Breakwater; a large dimension coastal structure with also come in high price.Due to this matter,a Hanging Sheet Pile type breakwater can be one of good solution.This research was conducted at Ocean Technology Laboratory,Faculty of Engineering,Universitas Hasanuddin,in a flume thank with 1:25 model scale,and equipped with wave generator and probes as measurement apparatus.The purpose of this study is to identify the effect of wave parameters(H1/gT~2)and structure parameters(draft relative,s/d)on fluctuated wave transmission coefficients produced.The waves are in the form of irregular waves that generated using JONSWAP spectrum.There were 5 variations in wave height(H)and wave period(T),while variations of structure in the form of draft(s)are in 3 variations.The results of this study indicate that the value of Kt will decrease when H,/gT2 value increase; so that the greater the value of s/d,the smaller value of Kt will be.
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