PEDRA, WINTERS (2023) STUDI KARAKTERISTIK DAN MEKANISME PEMBENTUKAN GELOMBANG INTERNAL BERDASARKAN PEMANTAUAN CITRA SATELIT SENTINEL-1 SAR DAN ANALISIS HIDRO-OSEANOGRAFI (23dos224). Undergraduate thesis, Fakultas Perikanan dan Ilmu Kelautan.

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Abstract

ABSTRAK
(Winters Pedra, 26020216140100, Studi Karakteristik Dan Mekanisme
Pembentukan Gelombang Internal Berdasarkan Pemantauan Citra Satelit SAR dan
Analisis Hidro-Oseanografi, Muhammad Helmi, Agus Anugroho Dwi Suryo P)
Penelitian ini bertujuan untuk menentukan keberadaan Gelombang Internal
dan karakteristik panjang gelombang dan luasan area studi. Kajian mengenai
Gelombang Internal pada awalnya diinisiasi oleh perusahaan pengeboran minyak
untuk mengetahui dampak dari gelombang terhadap bangunan lepas pantai. Studi
terbaru menunjukkan gelombang internal juga mempunyai peran dalam
pencampuran massa air dan nutrien di kolom perairan. Pengamatan arah
perambatan gelombang internal dapat diobservasi menggunakan citra satelit
Sentinel-1 SAR.
Kajian ini menemukan keberadaan gelombang internal di perairan Selat
Makassar. Gelombang tersebut terbentuk dua kali pada bulan Februari tahun 2020.
Area terbentuknya Gelombang Internal mencapai luas 24541,11 km2, panjang 170
km dan lebar 185 km dengan arah dominan menuju arah barat daya. Terbentuk 10
puncak gelombang tersebut mempunyai panjang gelombang 15,97 km, 6,49 km,
4,38 km, 11,65 km, 8,09 km, 2,88 km, 9,26 km, 7,75 km, 9,48 km, 3,79 km dan 3,5
km dengan lebar mencapai 230 km
Kata Kunci: Gelombang Internal, Sentinel-1 SAR, kekasaran permukaan laut,
Selat Makassar, pencampuran massa air.

ABSTRACT
(Winters Pedra, 26020216140100, Characteristic And Forming
Mechanism Of Internal Wave Based On Sentinel-1 Sar in Makassar Strait, Muhammad Helmi, Agus Anugroho Dwi Suryo P)
This research aims to determine the location of internal waves and to study
the characteristics of an internal wave such as wavelength and area of study. An
earlier study of internal waves was motivated by the unexpectedly large stresses
that they imposed on the offshore oil-drilling rig, but a recent study shows that
internal waves have a significant role in mixing and turbulence in the water column,
introducing high nutrient content. Propagation of internal waves can be observed
by using Sentinel-1 SAR imagery. From SAR imagery, the radar detects sea surface
roughness patterns associated with the internal waves. In this study, we found that
the internal wave in the Makassar Strait happens only in February throughout the
year 2020 in the westward monsoon season. It was formed due to the existence of a
seamount below sea level and happened during high tide to ebb tide. SAR imagery
has shown a packet of the internal wave with a wavelength of around 5 km to 16
km per soliton of the wave with an area of impact of around 14,000 km2. This data
can be used by researchers, engineering departments, local governments,
fishermen, and marine fishing companies for future decision-making.
Keywords: Internal wave, Sentinel-1 SAR, sea surface roughness, Makassar Strait,
mixing

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