Subsurface Characterization Using Multichannel Analysis of Surface Waves (MASW) for Coastal Abrasion Mitigation and Geotourism Planning at Nangai Beach, North Bengkulu

Authors

  • Redha Radiatul Insani Universitas Bengkulu
  • Hadi Geophysics Study Program, University of Bengkulu
  • Farid Geophysics Study Program, University of Bengkulu
  • Raihana Geophysics Study Program, University of Bengkulu
  • Al Ansory Geophysics Study Program, University of Bengkulu
  • Zaky Muammar Geophysics Study Program, University of Bengkulu

DOI:

https://doi.org/10.31172/jmg.v26i1.1152

Keywords:

Coastal Geophysics, MASW, Shear Wave Velocity (Vs), Vs30, Geotourism, Nangai Beach, Coastal Mitigation

Abstract

Subsurface rock weakness is considered a contributing factor to the high abrasion rate along Nangai Beach, North Bengkulu. This study aims to characterize the subsurface structure using shear-wave velocity (Vs) data derived from Multichannel Analysis of Surface Waves (MASW) at 21 measurement points along the coastline. The data were processed using WinMASW 5.0 Professional software, beginning with dispersion curve picking in the fundamental mode and followed by inversion to generate one-dimensional Vs profiles along with corresponding density and layer thickness. Interpretation of the 1D and 2D Vs profiles indicates that most of the study area is dominated by soft rock formations with generally low Vs30 values, highlighting the area’s vulnerability to coastal abrasion. Recommended mitigation strategies include natural restoration through coastal vegetation, construction of protective structures, and implementation of regional zoning to safeguard tourism and residential areas. Furthermore, active community participation in tourism management is essential to achieve a sustainable balance between environmental preservation and economic development. Overall, the findings provide valuable input for local governments in designing effective abrasion mitigation strategies and sustainable geotourism development plans.

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References

R. Refrizon, N. Sugianto, and A. Bernard, “Penentuan stratigrafi kecepatan gelombang geser (Vs) di daerah rawan abrasi Kabupaten Bengkulu Utara menggunakan metode Multichannel Analysis of Surface Wave (MASW),” Jurnal Meteorologi, Klimatologi, dan Geofisika, vol. 6, no. 2, pp. 15–20, 2019, doi: 10.36754/jmkg.v6i2.119.

M. Farid, K. Sri Brotopuspito, Wahyudi, Sunarto, and W. Suryanto, “Ground shear strain and rate of erosion in the coastal area of North Bengkulu, Indonesia,” Advanced Materials Research, vol. 896, pp. 521–524, 2014, doi: 10.4028/www.scientific.net/AMR.896.521.

B. Barus, Herianto, V. P. Siregar, and M. Harimurti, “Analisis daya dukung lahan untuk permukiman berbasis ancaman bencana di pulau-pulau kecil (studi kasus di Pulau Panggang dan Pulau Pramuka, Kabupaten Administrasi Kepulauan Seribu),” Majalah Ilmiah Globe, vol. 25, no. 1, pp. 77–86, 2023.

Darmiati, I. W. Nurjaya, and A. S. Atmadipoera, “Analisis perubahan garis pantai di wilayah Pantai Barat Kabupaten Tanah Laut, Kalimantan Selatan,” Jurnal Ilmu dan Teknologi Kelautan Tropis, vol. 12, no. 1, pp. 211–222, 2020, doi: 10.29244/jitkt.v12i1.22815.

N. S. Rahmawati, M. Farid, A. Rahmat, and A. Ansory, “Pemanfaatan citra satelit dan Multichannel Analysis of Surface Waves (MASW) untuk mitigasi bencana abrasi Desa Urai, Bengkulu,” BULOMA, vol. 13, no. 3, pp. 341–350, 2024, doi: 10.14710/buloma.v13i3.63278.

E. Susanti and I. P. Anggara, “Analisis mitigasi penanggulangan bencana di Kabupaten Ogan Komering Ulu,” Jurnal Ilmiah Wahana Bhakti Praja, vol. 10, no. 2, pp. 324–332, 2021, doi: 10.33701/jiwbp.v10i2.1374.

S. Gafoer, T. C. Amin, and R. Pardede, Peta Geologi Lembar Bengkulu, Sumatera (Geological Map of the Bengkulu Quadrangle, Sumatera), Bandung: Pusat Penelitian dan Pengembangan Geologi, 2007.

S. Gafoer and T. C. Amin, Geology of the Bengkulu Quadrangle, Sumatra, Bandung: Geological Research and Development Centre, Department of Mines and Energy, 2012.

I. Ullah and R. L. Prado, “Soft sediment thickness and shear-wave velocity estimation from the H/V technique up to the bedrock at meteorite impact crater site, São Paulo City, Brazil,” Soil Dynamics and Earthquake Engineering, vol. 94, pp. 215–222, 2017, doi: 10.1016/j.soildyn.2017.01.015.

T. Sesilia, M. Farid, A. I. Hadi, and A. R. Al Ansory, “Abrasion investigation using shear wave velocity and Poisson’s ratio approaches in Urai Village, North Bengkulu Regency,” Indonesian Physical Review, vol. 8, no. 1, 2025.

A. M. E. Mohamed, A. S. A. Abu El Ata, F. Abdel Azim, and M. A. Taha, “Site-specific shear wave velocity investigation for geotechnical engineering applications using seismic refraction and 2D multichannel analysis of surface waves,” NRIAG Journal of Astronomy and Geophysics, vol. 2, no. 1, pp. 88–101, 2013, doi: 10.1016/j.nrjag.2013.06.012.

I. Indra, R. Efendi, and A. Abdullah, “Estimasi kecepatan gelombang geser bawah permukaan pada lapisan dangkal menggunakan data mikrotremor di daerah Mamboro,” Gravitasi, vol. 17, no. 2, pp. 10–19, 2019, doi: 10.22487/gravitasi.v17i2.12418.

D. Chandran and P. Anbazhagan, “Subsurface profiling using integrated geophysical methods for 2D site response analysis in Bangalore City, India: A new approach,” Journal of Geophysics and Engineering, vol. 14, no. 5, pp. 1300–1314, 2017, doi: 10.1088/1742-2140/aa7bc4.

A. S. Rahman and S. Alfiandy, “Soil type classification based on shear wave velocity (Vs30) values in the Bekasi area,” Buletin GAW Bariri, vol. 5, pp. 1–6, 2024.

S. Rasimeng and A. Laksono, “Interpretasi nilai kecepatan gelombang geser (Vs30) menggunakan metode seismik Multichannel Analysis of Surface Wave (MASW) untuk memetakan daerah rawan gempa bumi di Kota Bandar Lampung,” Jurnal Geofisika Eksplorasi, vol. 3, no. 3, pp. 3–14, 2017. [Online]. Available: http://repository.lppm.unila.ac.id/34623

F. Linda and P. Lepong, “Interpretasi kecepatan gelombang seismik refraksi tomografi dalam penentuan litologi bawah permukaan di Desa Bhuana Jaya,” Jurnal Geosains Kutai Basin, vol. 2, no. 2, pp. 1–8, 2019.

A. M. Rasyid, J. P. G. N. Rochman, A. Widodo, M. R. Nabiha, P. P. M. Mario, and I. F. Salam, “Site classification based on shear wave velocity inversion in the Jlantah Dam construction project using HVSR analysis,” IOP Conference Series: Earth and Environmental Science, vol. 1307, no. 1, 2024, doi: 10.1088/1755-1315/1307/1/012006.

R. J. Honarto, “Perencanaan bangunan beton bertulang dengan sistem rangka pemikul momen khusus di Kota Manado,” Jurnal Sipil Statik, vol. 7, no. 2, pp. 201–208, 2019.

A. D. Yuliani and H. A. Rejeki, “Pengaruh gelombang terhadap abrasi di pesisir Kabupaten Demak, Kendal, dan Kota Semarang,” Indonesian Journal of Oceanography, vol. 2, no. 4, pp. 378–385, 2020, doi: 10.14710/ijoce.v2i4.9290.

S. Purwantara and M. Nursa’ban, “Pengukuran tingkat bahaya bencana erosi di Kecamatan Kokap,” Jurnal Geomedia, vol. 10, no. 1, pp. 111–128, 2012.

P. Susilanto, D. Ngadmanto, B. Sunardi, and S. Rohadi, “Shear-wave velocity (Vs) analysis as an effort toward earthquake disaster mitigation in Kulonprogo, Special Region of Yogyakarta,” Jurnal Lingkungan dan Bencana Geologi, pp. 41–50, 2018. [Online]. Available: http://jlbg.geologi.esdm.go.id

J. M. Yazalia, H. Johan, and R. W. Wardana, “Analysis of abrasion in coastal areas of North Bengkulu Beach as learning material for disaster mitigation,” Bencoolen Journal of Science Education and Technology, vol. 1, no. 2, pp. 55–60, 2020, doi: 10.33369/bjset.1.2.55-60.

B. T. Rumahorbo, M. Warpur, and B. Hamuna, “Detection of shoreline changes due to abrasion and accretion using Landsat imagery: A case study in the coastal areas of Supiori Regency, Indonesia,” Ecological Engineering & Environmental Technology, vol. 24, no. 7, pp. 161–171, 2023, doi: 10.12912/27197050/169358.

Badan Standardisasi Nasional, Tata Cara Perencanaan Ketahanan Gempa untuk Struktur Bangunan Gedung dan Non Gedung, 2019.

E. T. Sudjatmiko and H. Siswanto, “Studi penanganan jalan amblas di Desa Sumbernanas, Kecamatan Gedangan, Kabupaten Malang,” Bentang: Jurnal Teori dan Terapan Bidang Rekayasa Sipil, vol. 11, no. 2, pp. 113–128, 2023, doi: 10.33558/bentang.v11i2.6920.

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Published

2025-12-31

How to Cite

Insani, R. R., Hadi, A. I., Farid, M. ., Raihana, H., Al Ansory, A. R., & Muammar, Z. (2025). Subsurface Characterization Using Multichannel Analysis of Surface Waves (MASW) for Coastal Abrasion Mitigation and Geotourism Planning at Nangai Beach, North Bengkulu. Jurnal Meteorologi Dan Geofisika, 26(1), 11–20. https://doi.org/10.31172/jmg.v26i1.1152

Issue

Vol. 26 No. 1 (2025)

Section

Article

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Copyright (c) 2025 Redha Radiatul Insani, Hadi, Farid, Raihana, Al Ansory, Zaky Muammar

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