NUSRATINA, RINA HAZRINA (2023) STUDI KARAKTERISTIK ARUS LAUT DI SELAT MANSUAR, KABUPATEN RAJA AMPAT BERDASARKAN PEMODELAN HIDRODINAMIKA 2D (23dos221). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.
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Abstract
ABSTRAK
(Rina Hazrina Nusratina. 26050119130098. Studi Karakteristik Arus
Laut di Selat Mansuar, Kabupaten Raja Ampat Berdasarkan Pemodelan
Hidrodinamika 2D. (Dwi Haryo Ismunarti dan Aris Ismanto)
Kabupaten Raja Ampat terkenal dengan pemandangan alamnya yang
indah disertai pasir pantainya yang berwarna putih. Raja Ampat terletak pada
kawasan Coral Triangle atau pusat segitiga karang dunia. Kabupaten Raja Ampat
terdapat beberapa selat dan teluk salah satunya yaitu Selat Mansuar yang berada
diantara Pulau Gam dan Pulau Mansuar. Kondisi morfologi dasar laut yang terjal
dan tertutup terumbu karang, topografi perairan yang tidak teratur, posisi perairan
yang berada di pintu masuk bagian timur laut ARLINDO, serta adanya pengaruh
arus Halmahera Eddie memberikan pengaruh yang pada kecepatan dan arah arus
di Selat Mansuar. Kondisi tersebut dipengaruhi pula oleh batimetri perairan yang
cukup kompleks sehingga sangat menarik untuk dilakukan pengkajian. Penelitian
ini bertujuan untuk mengetahui karakteristik arus laut di Selat Mansuar,
Kabupaten Raja Ampat. Pendekatan numerik dilakukan melalui pemodelan
hidrodinamika dua dimensi. Hasil pendekatan hidrodinamika akan menghasilkan
kecepatan dan arah arus, serta nilai pasang surut. Data yang digunakan pada
penelitian ini yaitu data angin ERA-5, batimetri nasional (BATNAS), serta data
arus dan pasang surut pengukuran lapangan bersumber dari Pusat Penelitian dan
Pengembangan Geologi Kelautan (P3GL). Hasil pemodelan berupa kecepatan dan
arah arus untuk kemudian di validasi dengan data pengukuran lapangan. Hasil
penelitian menunjukkan bahwa karakteristik arus di Selat Mansuar lebih dominan
dipengaruhi oleh arus pasut. Pola arus yang dihasilkan pada puncak siklus angin
Musim peralihan I bergerak dominan ke arah Tenggara. Pada kondisi surut
menuju pasang arus memiliki kecepatan lebih tinggi dibandingkan dengan kondisi
lainnya, dengan nilai kecepatan rata-rata mencapai 0.235 m/s. Berdasarkan hasil
analisis komponen pasang surut, Selat mansuar termasuk tipe pasang surut
Campuran Condong Harian Ganda.
Kata Kunci: Karakteristik arus, Hidrodinamika 2D, Selat Mansuar, Raja Ampat
ABSTRACT
(Rina Hazrina Nusratina. 26050119130098. The Characteristics of
Ocean Current In Mansuar Straits, Raja Ampat Regency Based on 2D
Hydrodynamic Modelling. (Dwi Haryo Ismunarti dan Aris Ismanto)
Raja Ampat Regency is famous for its beautiful natural scenery and white
sand beaches. Raja Ampat is located in the Coral Triangle area or the center of
the world's coral triangle. Raja Ampat Regency has several straits and bays, one
of which is the Mansuar Strait between Gam Island and Mansuar Island. The
morphological conditions of the seabed are steep and covered with coral reefs,
irregular water topography, the position of the waters at the entrance to the
northeast part of ARLINDO, and the influence of the Halmahera Eddie current
which affects the speed and direction of the current in the Mansuar Strait. These
conditions are also influenced by the bathymetry of the waters which are quite
complex so it is very interesting to do an assessment. This study aims to determine
the characteristics of ocean currents in the Mansuar Strait, Raja Ampat Regency.
The numerical approach is done through two-dimensional hydrodynamic
modeling. The results of the hydrodynamic approach will produce current speed
and direction, as well as tidal values. The data used in this study are ERA-5 wind
data, national bathymetry (BATNAS), and field measurement data of currents and
tides sourced from the Marine Geology Research and Development Center
(P3GL). Modeling results in the form of current speed and direction and then
validated with field measurement data. The results showed that the characteristics
of the currents in the Mansuar Strait are dominantly influenced by tidal currents.
The resulting current pattern at the peak of the wind cycle Transitional season I
moves dominantly to the Southeast. At low tide conditions towards the tide the
current has a higher speed compared to other conditions, with an average speed
value reaching 0.235 m/s. Based on the results of the tidal component analysis,
the mansuar Strait includes a Mixed Tide Prevailing Semi Diurnal type.
Keywords : Ocean Current Characteristic, 2D Hydrodynamics, Mansuar Strait –
Raja Ampat
Item Type: | Thesis (Undergraduate) |
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Uncontrolled Keywords: | Karakteristik arus, Hidrodinamika 2D, Selat Mansuar, Raja Ampat Ocean Current Characteristic, 2D Hydrodynamics, Mansuar Strait – Raja Ampat |
Subjects: | Fisheries And Marine Sciences |
Divisions: | Faculty of Fisheries and Marine Sciences > Department of Oceanography |
Depositing User: | pancasila wati |
Date Deposited: | 06 May 2024 06:17 |
Last Modified: | 06 May 2024 06:17 |
URI: | https://eprints2.undip.ac.id/id/eprint/20180 |
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