Studi Eksperimental Peredaman Gelombang Pada Struktur Terumbu Buatan Heksagonal

Fahmi, M. Baharudin (2022) Studi Eksperimental Peredaman Gelombang Pada Struktur Terumbu Buatan Heksagonal. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu upaya rehabilitasi terumbu karang adalah dengan menggunakan terumbu buatan yang didesain menyerupai dengan kondisi terumbu alami. Pada penelitian thesis ini, diusulkan model terumbu karang buatan (artificial reef) berbentuk heksagonal dengan berpori yang difungsikan sebagai terumbu buatan sekaligus sebagai bangunan pemecah gelombang ambang rendah (submerged breakwater). Penelitian ini menggunakan metode pengujian fisik di kolam uji gelombang (wave flume) Departemen Teknik Kelautan ITS dengan parameter pengujian meliputi, kecuraman gelombng atau wave stepness (H/gT2 ), rasio lebar puncak (B/d), tinggi struktur arau submergence depth (h/d) untuk melihat kinerja peredaman gelombang atau Koefisien Transmis. Hasil pengujian menunjukan kenaikan nilai wave stepness (H/gT2 ) berpengaruh pada penurunan nilai Koefisien Transmisi (KT). Gelombang dengan nilai kecuraman (H/gT2) kecil (0.003) menghasilkan nilai KT yang lebih besar dibanding dengan kecuraman gelombang (H/gT2) besar (0.014). Selain itu kemampuan peredaman gelombang memperlihatkan faktor rasio lebar puncak struktur (B/d) dan tinggi struktur (h/d) berpengaruh terhadap besar nilai Koefisien Transmisi (KT). Nilai Koefisien Transmisi (KT) terbesar pada Model Struktur Terumbu A-1 (B/d=0.4, h/d=0.25) adalah 0.97, sedangkan nilai Koefisien Trasmisi (KT) terendah ada pada Model Struktur Terumbu A-7 (B/d=0.8, h/d=0.75) dengan nilai KT adalah 0.82.
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Generally, the purpose of artificial reefs is to rebuild naturally occurring coral reefs that have been destroyed. Without sacrificing the attractiveness of the protected beach, these manmade reefs functioned as new habitats for marine life and protected coasts by reducing wave energy. on the other side man-made artificial reefs can perform as submerged breakwaters, their ability to dampen incoming waves must be investigated. In this paper, the researchers present a new shape in the form of a hexagonal artificial reef. The wave attenuation performance index is calculated using the wave attenuation performance rating. The research focuses on the effect crest width rasio (B/d) and submerger depth or structural height (h/d) and on transmission wave value using a physical testing method on a scale of 1:10 at the wave flume of the Department of Marine Engineering, Sepuluh Nopember Institute of Technology, Surabaya. The results of the tests show that increasing the wave stepness (H/gT2) has an effect on decreasing the Transmission Coefficient (KT). Waves with a small steepness (H/gT2) (0.003) produced a higher KT value than waves with a large steepness (0.014). Furthermore, the wave damping ability demonstrates that the ratio of the crest width ratio (B/d) and submerged depth (h/d) influences the value of the Transmission Coefficient (KT). The highest Transmission Coefficient (KT) value is 0.97 in Reef Structure Model A-1 (B/d=0.4, h/d=0.25), while the lowest Transmission Coefficient (KT) value is 0.82 in Reef Structure Model A-7 (B/d=0.8, h/d=0.75).

Item Type:	Thesis (Masters)
Additional Information:	RTKe 627.24 Fah s-1 2022
Uncontrolled Keywords:	Terumbu buatan heksagonal, Pengujian model fisik, Submerged breakwater, Koefisien transmisi. Hexagonal artificial reef, Physical model testing, Submerged breakwater, Wave transmission coefficient.
Subjects:	T Technology > TC Hydraulic engineering. Ocean engineering
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38101-(S2) Master Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	06 Jul 2026 02:47
Last Modified:	06 Jul 2026 02:48
URI:	http://repository.its.ac.id/id/eprint/134325

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