Kajian Potensi Genangan Dan Waktu Tiba Tsunami Di Kota Lhokseumawe
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Abstract
Lhokseumawe was one of the towns affected by the 2004 tsunami. During the last tsunami, tsunami waves arrived last on the coast of Lhokseumawe compared to the western and northern coastal areas of Aceh. Therefore, this tsunami modelling study was conducted to determine the arrival time of tsunami waves on the coast of Lhokseumawe city and to determine the affected areas from the tsunami inundation map information. The method used is tsunami numerical modelling using the COMCOT (Cornell Multi Grid Coupled Tsunami Model) model. The earthquake source used to generate the tsunami is a 9.15 Mw earthquake of the magnitude of the 2004 earthquake, 8.0 Mw and 8.5 Mw earthquake scenarios. Bathymetric data were used to provide information on sea depth and topographic data to provide information on land elevation in the study area. Observation points were placed on the coast to record when the waves reached the coast. The maximum tsunami height occurred in Blang Mangat subdistrict with a tsunami height of 5 m and inundation distance of 1 km. The arrival time of the tsunami in Lhokseumawe town was 75-80 min after the earthquake. This information on tsunami height and arrival time can be used as preliminary information for tsunami mitigation planning and rapid response in the event of an earthquake with tsunami potential.
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References
S. Koshimura, T. Oie, H. Yanagisawa, and F. Imamura, “Developing fragility functions for tsunami damage estimation using numerical model and post-tsunami data from banda aceh, Indonesia,” Coastal Engineering Journal, vol. 51, no. 3, pp. 243–273, Sep. 2009, doi: 10.1142/S0578563409002004.
C. E. Synolakis, E. N. Bernard, V. V. Titov, U. Kânoǧlu, and F. I. González, “Validation and verification of tsunami numerical models,” in Pure and Applied Geophysics, 2008, pp. 2197–2228. doi: 10.1007/s00024-004-0427-y.
Ibrahim, S. K. Intan, and F. A. Gani, “Pemodelan Penjalaran Gelombang Tsunami Di sepanjang Pantai Timur Aceh,” PORTAL, vol. 3, no. Oktober 2011, pp. 35–44, 2011.
Ibrahim, Syamsidik, Azmeri, M. Hasan, and Tursina, “Investigating characteristics of tsunami hazards for west coast of Aceh Besar district, Indonesia,” E3S Web Conf., vol. 340, 2022, [Online]. Available: https://doi.org/10.1051/e3sconf/202234001005
Behrens, Jörn, et al. "Probabilistic tsunami hazard and risk analysis: A review of research gaps." Frontiers in Earth Science 9 (2021): 628772.
Kamphuis, J. William. Introduction to coastal engineering and management. Vol. 48. World Scientific, 2020.
Bobrowsky, Peter T., ed. Encyclopedia of natural hazards. Vol. 1135. Dordrecht: Springer, 2013.
UNISDR, “Tsunami Hazard and Risk Assessment,” Words into Action Guidelines: National Disaster Risk Assessment, no. July, pp. 1–9, 2017, [Online]. Available: https://www.unisdr.org/we/inform/publications/57441
S. Pribadi, Afnimar, N. T. Puspito, and G. Ibrahim, “Characteristics of earthquake-generated tsunamis in Indonesia based on source parameter analysis,” Journal of Mathematical and Fundamental Sciences, vol. 45, no. 2, pp. 189–207, 2013, doi: 10.5614/j.math.fund.sci.2013.45.2.8.
Tim Pusat Studi Gempa Nasional, Peta Sumber Dan Bahaya Gempa Indonesia Tahun 2017. 2017.
D. Wells and K. Coppersmith, “New Empirical Relationships among Magnitude, Rupture Length, Rupture Width, Rupture Area, and Surface Displacement,” Bulletin of the Seismological Society of America, vol. 84, no. August 1994, pp. 974–1002, Aug. 1994.
L. Li, Z. Huang, Q. Qiu, D. H. Natawidjaja, and K. Sieh, “Tsunami-induced coastal change: Scenario studies for Painan, West Sumatra, Indonesia,” Earth, Planets and Space, vol. 64, no. 10, pp. 799–816, 2012, doi: 10.5047/eps.2011.08.002.
T. Steinmetz et al., “Tsunami early warning and decision support,” Natural Hazards and Earth System Science, vol. 10, no. 9, pp. 1839–1850, 2010, doi: 10.5194/nhess-10-1839-2010.
Kapoor, D. C. "General bathymetric chart of the oceans (GEBCO)." Marine Geodesy 5.1 (1981): 73-80
S. Koshimura, T. Oie, H. Yanagisawa, and F. Imamura, “Developing fragility functions for tsunami damage estimation using numerical model and post-tsunami data from banda aceh, Indonesia,” Coastal Engineering Journal, vol. 51, no. 3, pp. 243–273, 2009, doi: 10.1142/S0578563409002004.
Direktorat Jenderal Planologi Kehutanan, “Direktorat Jenderal Planologi Kehutanan.” Accessed: Jun. 23, 2021. [Online]. Available: http://appgis.menlhk.go.id/
Meigh, John David, Ir Minanto Minanto, and Abdul Rachim. "Aceh and Nias, Indonesia post-tsunami reconstruction by survivor participation." Proceedings of the Institution of Civil Engineers-Forensic Engineering 171.2 (2018): 70-79.