Identifikasi Potensi Longsor Bawah Laut Perairan Yapen, Papua menggunakan Data Sub-Bottom Profiler (SBP)

Hidayat, Chintya Novianti Putri (2024) Identifikasi Potensi Longsor Bawah Laut Perairan Yapen, Papua menggunakan Data Sub-Bottom Profiler (SBP). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Aktivitas tektonik di Indonesia bagian timur sangat kompleks. Pergerakan dua lempeng besar yaitu Lempeng Samudera Pasifik - Caroline dan Lempeng Benua Indo-Australia yang saling bertumbukan mempengaruhi kondisi geologi Papua. Perairan Yapen, yang terletak di pantai utara Provinsi Papua, berada di zona konvergensi antara Lempeng Samudera Pasifik - Caroline dan Lempeng Indo-Australia serta zona Sesar Yapen, ini dapat menjadi faktor rentan terjadinya longsor bawah laut. Oleh karena itu, penelitian ini bertujuan untuk menganalisis potensi longsor bawah laut di Perairan Yapen, Papua menggunakan sub-bottom profiler (SBP) sebanyak 45 lintasan, data analisis sedimen dasar laut yang dilakukan oleh Balai Besar Survei dan Pemetaan Geologi Kelautan (BBSPGL) tahun 2018, dan data seismik yang digunakan untuk mengkarakterisasi lapisan dasar laut (seabed). Hasil penelitian menunjukkan kedalaman laut (batimetri) daerah penelitian memiliki kedalaman berkisar antara 26 hingga 1054 meter Mean Sea Level (MSL), dengan kedalaman dangkal di bagian utara dan semakin ke arah barat daerah penelitian kedalaman semakin dalam. Kemiringan lereng terdiri dari empat klasifikasi, yang didominasi oleh klasifikasi kemiringan lereng datar yang berada di utara daerah penelitian. Analisis sedimen menunjukkan bahwa sedimen di bagian utara dan selatan daerah penelitian didominasi oleh lanau (silt) dengan pola reflektor paralel dan relatif halus dari sub-bottom profiler. Peta kerentanan longsor bawah laut menunjukkan 85,3% daerah penelitian memiliki kerentanan rendah, 10,33% sedang, dan 4,37% tinggi. Oleh karena itu, potensi kerentanan longsor bawah laut di Perairan Yapen, Papua diindikasikan sangat rendah.
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Tectonic activity in eastern Indonesia is very complex. The movement of two large plates, the Pacific Ocean Plate - Caroline and the Indo-Australian Continental Plate, which collide with each other, affects Papua's geological conditions. Yapen Waters, located on the north coast of Papua Province, is in the convergence zone between the Pacific Ocean Plate - Caroline, the Indo-Australian Plate, and the Yapen Fault Zone; this can be a vulnerable factor for submarine landslides. Therefore, this study aims to analyze the potential for submarine landslides in Yapen Waters, Papua, using 45 sub-bottom profilers (SBP), seabed sediment analysis data conducted by BBSPGL in 2018, and seismic data used to characterize the seabed. The results showed that the bathymetry of the study area has a depth ranging from 26 to 1054 meters Mean Sea Level (MSL), with shallow depths in the north and deeper depths further west. The slope consists of four classifications, dominated by the flat slope classification in the north of the study area. Sediment analysis shows that the sediment in the north and south of the study area is dominated by silt with parallel and relatively smooth reflector patterns from the sub-bottom profiler. The submarine landslide vulnerability map shows that 85,3% of the study area has low vulnerability, 10,33% is moderate, and 4,37% is high. Therefore, the potential for submarine landslide vulnerability in the Yapen Waters, Papua, is indicated as very low.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Batimetri, Kemiringan Lereng, Longsor Bawah Laut, Sedimen, Sub Bottom Profiler (SBP) Bathymetry, Slope, Submarine Landslide, Sediment, Sub-Bottom Profiler (SBP)
Subjects:	Q Science > QE Geology > QE599 Landslides. Rockslides
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Chintya Novianti Putri Hidayat
Date Deposited:	12 Aug 2024 07:32
Last Modified:	27 Aug 2024 07:48
URI:	http://repository.its.ac.id/id/eprint/114714

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