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All Journal JFA (Jurnal Fisika dan Aplikasinya) Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika
Putri, Adinda Permata
University of Bengkulu
Astronomy Earth & Planetary Sciences Education Materials Science & Nanotechnology Physics

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Identification of Shoreline Shifts and Subsurface Layers Using Google Earth Pro with the Multichannel Analysis of Surface Wave (MASW) Method in the Abrasion-Prone Areas of Central Bengkulu to Seluma Putri, Adinda Permata; Refrizon, Refrizon; Hadi, Arif Ismul; Sinaga, Yuni Kharisma; Jaya, Shara Ashari Prana
Jurnal Fisika dan Aplikasinya Vol 20, No 2 (2024)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v20i2.21032

Abstract

Abstract: Central Bengkulu to Seluma is mostly abraded and slightly accreted. Shoreline changes occur as a result of sediment movement, wave action, ocean currents, and human activities. This study aims to determine, analyze changes in the coastline from North Bengkulu to Seluma using Google Earth Pro and determine the value of rock stratigraphic layers using the Multichannel Analysis of Surface Wave (MASW) method. Field data collection was carried out using the Seismograph PASI 16S-24P seismic tool. The results of mapping and validation of primary data that has been inversed and then processed in surfer software, show that the beach with the largest abrasion value over a span of 16 years is Muara Dua beach in track 3, with a shoreline change of 6.7m / year. Then based on the value of Vs the coastal area of Central Bengkulu to Seluma is divided into 3 class sites, namely class D stiff soil, C very dense soil and soft rock and B medium rock.
Identification of subsurface layers and shoreline shifts in abrasion-prone areas of the northern part of Bengkulu Province using multichannel analysis surface wave method and Google Earth Pro Sinaga, Yuni Karisma; Refrizon, Refrizon; Farid, Mochammad; Putri, Adinda Permata; Syah, Muhammad Taufiqurrahman; Sasabela, Naela Sahada
Gravity : Jurnal Ilmiah Penelitian dan Pembelajaran Fisika Vol 11, No 1 (2025)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/gravity.v11i1.29134

Abstract

Shoreline change is a phenomenon that occurs due to land erosion or abrasion. This study aims to measure and analyze shoreline changes and determine rock stratigraphy based on the value of secondary wave propagation velocity (Vs) in the Northern Bengkulu Province. The research was conducted at 52 points along the coast with three main stages, namely seismic data acquisition in the field, dispersion analysis, and dispersion curve inversion. Observation of shoreline changes was conducted using quantitative methods with a geophysical approach, utilizing satellite data from Google Earth Pro. Meanwhile, stratigraphic acquisition was performed using the Multichannel Analysis of Surface Waves (MASW) method. The results showed that the soil layers in the Northern Bengkulu Province area include alluvium and poor consistency, soft layers. The second to fourth layer contains a medium-dense soil layer of coarse and fine-grain soil. The fifth layer comprises a soft rock layer consisting of coarse-grain and fine-grain soils. The Vs30 values obtained range from 115 m/s to 576 m/s, indicating that the Northern part Bengkulu Province area is dominated by Site Class SC (hard, highly compacted soil and soft rock) vulnerable to deformation, including abrasion. The research results obtained in the form of Vs30 values of 115 m/s to 576m/s are dominated by three rock formations: bintunan formation, lake deposits and andesite. Stratigraphic data and Vs30 values can be used for coastal infrastructure development, such as sea walls, breakwaters, and other protection structures to reduce abrasion.
Co-Authors Farid, Mochammad Hadi, Arif Ismul Jaya, Shara Ashari Prana Refrizon, Refrizon Sasabela, Naela Sahada Sinaga, Yuni Karisma Sinaga, Yuni Kharisma Syah, Muhammad Taufiqurrahman