Analysis Of Liquifaction Potential Using The Method Microzonation in Coastal Zone at North Aceh District
Keywords:Liquefaction, Microzonation, Seismic, Mapping, North Aceh
Liquefaction is a natural phenomenon that occurs when previously sandy soil turns into mush as a result of an earthquake and has the potential to become a natural disaster if not anticipated early. the coastal zone of Dewantara District is included in the earthquake-prone area (referring to the results of previous studies, the value of the seismic vulnerability index is between 0.41 to 18.3 Kg, with the potential for damage caused to be medium and high risk) because most of the area is an area that has alluvial plains a wide beach and located on a tectonic route so that it is estimated that there is a potential follow-up threat after an earthquake occurs, in the form of liquefaction. Determination of the distribution of liquefaction potential due to earthquakes is determined based on data obtained from microtremor measurements. The specific objective of this study is to provide information regarding the potential and vulnerability of liquefaction to Policy Makers/Local Governments in evaluating plotting areas and/or preparing regional spatial plans based on disaster risk reduction/mitigation aspects. Based on the results of the processed data analysis, several important conclusions can be identified in this study. The character of soil vulnerability is related to the value of dominant frequency (f0), soil amplification (A0), and seismic vulnerability index (seismic vulnerability index). This relationship can be used to formulate whether an area has the potential to experience lateral ground motion (liquefaction) which potentially can affect the coastal area of Dewantara District. Based on microseismic data analysis (standard deviation), several disaster-prone zone points were obtained in the north and east of the measurement point. In detail, this is shown by the map of the distribution of SVI values in the Coastal Area which is in the range of 20-100, especially in the north it is at a value above 75, which allows for a higher chance of liquefaction on the condition that there are major earthquakes accompanied by with rock pores filled with fluid.
Bencana, B. N. P. (2020). Rencana Nasional Penanggulangan Bencana 2020-2024.
Siska, D., Fithra, H., Lisa, N. P., Haerudin, N., & Farid, M. (2020). Seismic VulnerabilityMapping of the Lhokseumawe Region to Support the Spatial Plan of LhokseumaweCity. Journal of Computational and Theoretical Nanoscience, 17(7), 3153-3159.
Suhartini, C. E., Mase, L. Z., & Farid, M. (2021). Mapping the liquefaction potential index(LPI) in Ratu Agung subdistrict, Bengkulu City, Indonesia using the shear wave velocityapproach. In E3S Web of Conferences (Vol. 331, p. 04014). EDP Sciences.
Nakamura, Y. (1989). A method for dynamic characteristics estimation of subsurfaceusingmicrotremor on the ground surface. Railway Technical Research Institute, QuarterlyReports, 30(1).
Keats, W., Cameron, N. R., Djunuddin, A., Ghazali, S. A., Harahap, H., Kartawa, W., ... &Whandoyo, R. (1981). The Geology of the Lhokseumawe Quadrangle, Sumatra. Geological Research and Development Centre, Bandung.[Explanatory note, 13pp., and geological map, quadrangle 0521, 0621
Deassy Siska, D. S., & Nandi Haerudin, N. H. (2020). Seismic Vulnerability Mappingofthe Lhokseumawe Region to Support the Spatial Plan of Lhokseumawe City. Journal of Computational and Theoretical Nanoscience, 17(7), 302-308.
Deassy Siska, Herman Fithra, Nova Purnama Lisa, Nandi Haerudin, MuhammadFarid. (2020). Seismic Vulnerability Mapping to Support Spatial Plans in LhokseumaweCityArea International Journal on Advanced Science, Engineering and Information Technology.
Sieh, K., & Natawidjaja, D. (2000). Neotectonics of the Sumatran fault, Indonesia. Journal of Geophysical Research: Solid Earth, 105(B12), 28295-28326.
Muksin, U., Bauer, K., Muzli, M., Ryberg, T., Nurdin, I., Masturiyono, M., &Weber, M. (2019). AcehSeis project provides insights into the detailed seismicity distributionandrelation to fault structures in Central Aceh, Northern Sumatra. Journal of AsianEarthSciences, 171, 20-27.
Aditama, M. R., Saadi, A. G., & Nurcahya, B. E. (2020). Investigasi KerentananTanahBerpotensi Likuifikasi Menggunakan Metode Mikroseismik Di Wilayah Prambanan, Yogyakarta. Dinamika Rekayasa, 16(2), 105-111.
Sulthan, F., Angraini, M., & Meuna, M. A. Tantangan Pembangunan Infrastruktur PascaPemutakhiran Peta Sumber dan Bahaya Gempa Indonesia Tahun 2017.
Aditama, M. R., Saadi, A. G., & Nurcahya, B. E. (2020). Investigasi KerentananTanahBerpotensi Likuifikasi Menggunakan Metode Mikroseismik Di Wilayah Prambanan, Yogyakarta. Dinamika Rekayasa, 16(2), 105-111.Seed, H. B., Lee, K. L., Idriss, I. M., &Makdisi, F. I. (1975). The slides in the San Fernando dams during the earthquakeofFebruary 9, 1971. Journal of the Geotechnical Engineering Division, 101(7), 651-688.
Barber, A. J., Crow, M. J., & Milsom, J. (Eds.). (2005). Sumatra: Geology, resources andtectonic evolution. Geological Society of London.
Tohari, A., Syahbana, A. J., Satrio, N. A., &Soebowo, E. (2013). Karakteristik likuifaksi tanah pasiran di kota padang berdasarkan metode microtremor. Prosiding PemaparanHasil Penelitian Puslit Geoteknik-LIPI, Bandung, 95-105.
Bard, P. Y. (1999). Microtremor measurements: a tool for site effect estimation. The effectsof surface geology on seismic motion, 3, 1251-1279.
Huang, H. C., & Tseng, Y. S. (2002). Characteristics of soil liquefaction usingH/Vofmicrotremors in Yuan-Lin area, Taiwan. Terrestrial Atmospheric and OceanicSciences, 13(3), 325-338.
Putra, A. T. J. (2014). Pemetaan Kerentanan Daerah Potensi Likuifaksi, Akibat Gempabumi Tektonik Studi Kasus Daerah Desa Panjangrejo Dan Sekitarnya, KecamatanPundong, Kabupaten Bantul, Daerah Istimewa Yogyakarta. Geological EngineeringE-Journal, 6(1), 294-312.
Noor, M. R. S. (2017). Potensi Likuifaksi Tanah Berdasarkan Pengukuran MikrotremorStudi Kasus Kecamatan Puger, Jember (Doctoral dissertation, Institut Teknologi SepuluhNopember).
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