Abstract
In solving the problem of abrasion and also protecting marine ecosystems, it is necessary to come up with an idea, namely a wave energy retaining structure that is also capable of being a habitat for marine biota. Therefore, in this study, artificial coral reefs were tested which are considered capable to solv e these problems, plus those which at the same time rehabilitate damaged coral reef ecosystems. The artificial reefs model in this test is a hexagonal type with one layer arrangement. To get the success value (K D ) of artificial reefs, it is seen from the percentage of damage caused by the influence of height and wave period. Then the K D value was calculated using the Hudson formula so that it was found that the hexagonal type artificial reefs had a K D value = 1.2.
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