Penelitian Gelombang Transmisi Pada Terumbu Buatan Dengan Bentuk Hexagonal (Hexareef) Dengan Pengaruh Konfigurasi Horizontal

Napitupulu, Leonard Hasiolan (2018) Penelitian Gelombang Transmisi Pada Terumbu Buatan Dengan Bentuk Hexagonal (Hexareef) Dengan Pengaruh Konfigurasi Horizontal. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kerusakan pantai dalam bentuk abrasi pantai, telah menjadi masalah bagi banyak pesisir pantai. Para ahli telah memanfaatkan banyak jenis bangunan seperti revetment, groin dan detached breakwater untuk mengatasi masalah abrasi tersebut. Jenis bangunan tersebut dapat mencegah abrasi, tapi umumnya dianggap tidak ramah lingkungan, khususnya ditinjau dari sudut pandang kepariwisataan. Untuk itu dilakukan upaya penanggulangan kerusakan pantai tanpa mengurangi estetika atau kesan alamiah dari pantai tersebut yaitu dengan menggunakan terumbu buatan (Artificial Reef). Peran terumbu buatan selain sebagai habitat ikan seperrti layaknya terumbu karang, juga dapat berfungsi sebagai struktur pelindung pantai dengan mereduksi energi gelombang yang datang menuju ke pantai. Dalam penelitian ini dilakukan uji transmisi terumbu buatan (artificial reef) berbentuk hexagonal dengan berbagai konfigurasi horizontal. Pengujian dilakukan di laboratorium Wave Flume Departemen Teknik Kelautan FTK ITS. Hasil analisa data menunjukkan bahwa : (1) nilai koefisien transmisi meningkat dengan berkurangnya wave steepness, sebaliknya koefisien transmisi menurun dengan meningkatnya wave steepness, (2) Untuk pengujian gelombang reguler konfigurasi dengan lebar puncak 1,09 m dan tinggi struktur 0,1 m menghasilkan nilai koefisien transmisi paling kecil dibanding konfigurasi lainya., (3) Energi terbesar yang berhasil direduksi pada konfigurasi 4 pada saat pengujian ke 10 dengan tinggi gelombang signifikan (Hs) 0,7 m dan periode 1,4 detik sebesar 62,46%. ============== Beach damage in the form of coastal abrasion, has been a problem for many coastal areas. Experts have utilized many types of coastal structures such as revetment, groynes and detached breakwaters to solve the problems. This type of building may prevent shoreline abrasion, but generally not considered as environmentally friendly, especially from the point of view of tourism. To overcome the damage to the beach without reducing the aesthetic or natural features of the beach Artificial Reefsare proposed. The role of artificial reefs as fish habitat like coral reefs, can also served as coastal protection structures by reducing the energy of incoming waves the coast. In this experiment the wave transmission of hexagonal shape artificial reefs will be analyzed based on their horizontal configuration.. The tests were conducted in Wave Flume laboratory of Marine Engineering Departement, Faculty of Marine Technology ITS. the results of the experiment show that: (1) the value of the transmission coefficient increases with the decrease of wave steepness, in the contrary, the transmission coefficient decreases with the increase of wave steepness, (2) For regular waves, configuration with the width of 1,1 m and the height of the structure 0,1 m has the lowest transmission coefficient comparing to other configuration, (3) The largest energy reduced during irregular wave test occurs at configuration 4 where the width of 1,09 m m and the height of structure 0,1 m at 0,7 m significant wave height and period of 1,4 seconds with transmission coefficient of 62,46%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Submarge Breakwater; Artificial reef; Hexareef, Koefisien Transmisi; Submerged Breakwater; Transmission Coeficient
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling > SH157.85 Artificial reefs.
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TA Engineering (General). Civil engineering (General) > TA681 Concrete construction
T Technology > TC Hydraulic engineering. Ocean engineering
Divisions: Faculty of Marine Technology > Ocean Engineering > (S1) Undergraduate Theses
Depositing User: Leonard Hasiholan Napitupulu
Date Deposited: 02 Mar 2018 05:16
Last Modified: 02 Mar 2018 05:16
URI: http://repository.its.ac.id/id/eprint/49774

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