TSUNAMI HAZARD LEVEL MAPPING USING GEOGRAPHIC INFORMATION SYSTEMS IN TRENGGALEK REGENCY
Keywords:
bahaya tsunami, genangan, pemodelan spasial, Trenggalek, SIGAbstract
Indonesia’s southern coastal regions, including Trenggalek Regency, are highly vulnerable to tsunamis due to their proximity to the active subduction zone along the Indian Ocean. Accurate hazard mapping is therefore crucial to support disaster risk reduction efforts. This study aims to analyze and map the tsunami hazard level in the coastal region of Trenggalek Regency using a spatial modeling approach based on Geographic Information Systems (GIS). The method integrates topographic slope, surface roughness, and tsunami wave height data to estimate inundation extent through a mathematical model that incorporates Hloss (wave height loss). The model outputs were used to generate a tsunami hazard index, ranging from 0 to 1, and classified into three hazard classes: low, medium, and high. The results indicate that coastal areas with flat terrain and low roughness coefficients such as settlements and rice fields in the districts of Watulimo, Panggul, and Munjungan are categorized as high hazard zones due to their vulnerability to wide-scale inundation. In contrast, forested or steep-sloped regions demonstrate limited inundation extents due to greater physical resistance. This spatial mapping provides essential information for disaster mitigation, coastal planning, and early warning system development in tsunami-prone areas.
References
DAFTAR PUSTAKA
Anjeli, N., Sugara, A., Anggoro, A., & Suci, A. N. N. F. N. (2025). Pemodelan tingkat bahaya bencana tsunami dengan menggunakan sistem informasi geografis di Pulau Enggano, Bengkulu Utara. Majalah Ilmiah Globe, 27(1), 23–36. https://jurnal.big.go.id/GL/article/view/219
Anugrah, S. D., Zaim, Y., Rizal, Y., Aswan, & Istiyanati. (2015). A preliminary study of a paleotsunami deposit along the south coast of East Java: Pacitan–Banyuwangi. https://doi.org/10.1063/1.4915251
Badan Meteorologi Klimatologi dan Geofisika. (2019). Katalog tsunami Indonesia per-wilayah tahun 416–2018. Pusat Gempabumi dan Tsunami Kedeputian Bidang Geofisika.
Badan Nasional Penanggulangan Bencana. (2021). Dokumen kajian risiko bencana nasional Provinsi Jawa Timur 2022–2026. Kedeputian Bidang Sistem dan Strategi Direktorat Pemetaan dan Evaluasi Risiko Bencana.
Benazir, Triatmadja, R., Yuwono, N., Rahardjo, A. P., Kuswandi, Triatmodjo, B., & Nizam. (2024). Investigating the tsunami-mitigating properties of vegetated coastal areas in Pacitan Bay, Indonesia: A synergistic approach of numerical modelling and field observations. Journal of Earth System Science, 133(1), 37. https://doi.org/10.1007/s12040-023-02242-7
Budiman, M. J., Sutoyo, & Syafiudin, M. F. (2024). Pemetaan kerentanan bahaya tsunami dengan pemodelan inundansi (Studi kasus: Kabupaten Bantul). Jurnal Teknik Sipil dan Lingkungan, 9(2), 157–166. https://doi.org/10.29244/jsil.9.2.157-166
Dewatama, E., & Ekaputra. (2021). Tsunami hazard mapping and loss estimation in Yogyakarta International Airport area. Built Environment Studies, 2(1), 1–11. https://doi.org/10.22146/best.v2i1.535
Fachri, H. T., Malik, Y., & Murtianto, H. (2022). Pemetaan tingkat bahaya bencana tsunami menggunakan sistem informasi geografis di pesisir Kota Bengkulu. Jurnal Pendidikan Geografi Undiksha, 10(2), 166–178. https://doi.org/10.23887/jjpg.v10i2.43541
Hall, S., Pettersson, J., Meservy, W., Harris, R., Agustinawati, D., Olson, J., & McFarlane, A. (2017). Awareness of tsunami natural warning signs and intended evacuation behaviors in Java, Indonesia. Natural Hazards, 89(1), 473–496.
Huda, M. B., & Jumadi. (2023). Analisis bahaya tsunami dan penentuan jalur evakuasi menggunakan sistem informasi geografis di wilayah pesisir (Studi kasus: Kecamatan Pacitan Kabupaten Pacitan) [Skripsi, Universitas Muhammadiyah Surakarta].
Irawan, L. Y., Islam, S. N., Sumarmi, Ardiansyah, Z. F., Dani, F. A., Fadhlurahman, I., Religi, M. D., Sari, R. R. A., & Farihah, S. N. (2024). GIS modelling for prediction of tsunami inundation areas in coastal areas of Malang Regency. IOP Conference Series: Earth and Environmental Science, 1406(1). https://doi.org/10.1088/1755-1315/1406/1/012017
Jumadi, J., Priyono, K. D., Amin, C., Saputra, A., Gomez, C., Lam, K. C., Rohman, A., Patel, N., Sattar, F., Nawaz, M., & Wardani, K. S. (2025). Tsunami risk mapping and sustainable mitigation strategies for megathrust earthquake scenario in Pacitan coastal areas, Indonesia. Sustainability (Switzerland), 17(6). https://doi.org/10.3390/su17062564
Marsh, C. B., Harder, P., & Pomeroy, J. W. (2023). Validation of FABDEM, a global bare-earth elevation model, against UAV-lidar derived elevation in a complex forested mountain catchment. Environmental Research Communications, 5(3). https://doi.org/10.1088/2515-7620/acc56d
Nugianto, N. (2024). Pemetaan area terdampak tsunami menggunakan sistem informasi geografis di pesisir Kabupaten Kebumen [Skripsi, Institut Pertanian Bogor].
Osama, N., Shao, Z., & Freeshah, M. (2023). The FABDEM outperforms the global DEMs in representing bare terrain heights. Photogrammetric Engineering and Remote Sensing, 89(10), 613–624. https://doi.org/10.14358/PERS.23-00026R2
Paramita, P., Wiguna, S., Shabrina, F. Z., & Sartimbul, A. (2021). Pemetaan bahaya tsunami wilayah Kabupaten Serang bagian barat menggunakan sistem informasi geografis. Buletin Oseanografi Marina, 10(3), 233–241. https://doi.org/10.14710/buloma.v10i3.37228
Pronk, M., Hooijer, A., Eilander, D., Haag, A., de Jong, T., Vousdoukas, M., Vernimmen, R., Ledoux, H., & Eleveld, M. (2024). DeltaDTM: A global coastal digital terrain model. Scientific Data, 11(1), 1–18. https://doi.org/10.1038/s41597-024-03091-9
Pusat Gempa Nasional. (2017). Peta sumber dan bahaya gempa Indonesia tahun 2017. Pusat Penelitian dan Pengembangan Perumahan dan Permukiman.
Putri, A. M., Saputra, A., & Wibowo, A. A. (2024). Study of tsunami source as preparation for tsunami modeling in Sulawesi. IOP Conference Series: Earth and Environmental Science, 1314(1). https://doi.org/10.1088/1755-1315/1314/1/012126
Rakuasa, H., & Salakory, D. M. (2022). Pemodelan spasial bahaya tsunami dan keterpaparannya terhadap permukiman di Kota Ambon. Jurnal Sains Informasi Geografi, 5(1), 31–37. https://doi.org/10.31314/j
Sarah, R., Awaluddin, R., & Hadi, F. (2024). Analisis bahaya bencana tsunami di Kota Cilegon menggunakan sistem informasi geografis. Jurnal Geodesi Undip, 13(1), 58–64.
Setyaningsih, D. P., Sutiono, H. E. C. P., Paramanandi, A. R. G., Khasanah, E. U., Wahyuni, T., Jati, B. A. E. K., Al Akbar, M. F., Widyatmanti, W., & Wibowo, T. W. (2023). Tsunami hazard modeling in the coastal area of Kulon Progo Regency. International Journal of Remote Sensing and Earth Sciences (IJReSES), 19(2), 184. https://doi.org/10.30536/j.ijreses.2022.v19.a3822
Steinritz, V., Pena-Castellnou, S., Marliyani, G. I., & Reicherter, K. (2021). GIS-based study of tsunami risk in the Special Region of Yogyakarta (Central Java, Indonesia). IOP Conference Series: Earth and Environmental Science, 851(1). https://doi.org/10.1088/1755-1315/851/1/012007
Subardjo, P., & Ario, R. (2016). Uji kerawanan terhadap tsunami dengan sistem informasi geografis (SIG) di pesisir Kecamatan Kretek, Kabupaten Bantul, Yogyakarta. Jurnal Kelautan Tropis, 18(2), 82–97. https://doi.org/10.14710/jkt.v18i2.519
Sudaryatno, S., Sumantyo, J. T. S., Purwanto, T. H., Al Akbar, M. F., Gita, A. R., & Shalih, O. (2024). Analysis and geovisualization of tsunami hazard and evacuation routes in the Opak-Progo coastal area. Forum Geografi, 38(2), 257–265. https://doi.org/10.23917/FORGEO.V38I2.5436
Sugandhi, N., Supriatna, Kusratmoko, E., & Rakuasa, H. (2023). Spatial modelling of tsunami hazards and their exposure to settlements in Ambon City. IOP Conference Series: Earth and Environmental Science, 1173(1). https://doi.org/10.1088/1755-1315/1173/1/012013
Surindar, A. B., & Nurhadi. (2021). Community preparedness for tsunami hazard in Galur District, Kulon Progo Regency, Special Region of Yogyakarta. IOP Conference Series: Earth and Environmental Science, 884(1), 012038.
Ulinnuha, R. R., & Jumadi. (2025). 3D modelling of tsunami disaster in Pacitan Regency, East Java, using ArcGIS. IOP Conference Series: Earth and Environmental Science, 1462(1). https://doi.org/10.1088/1755-1315/1462/1/012014
Usman, F., Hariyani, S., & Shoimah, F. (2021). Perencanaan partisipatif tanggap darurat bencana tsunami di pesisir selatan Watulimo, Trenggalek. Tataloka, 23(1), 138–150. https://doi.org/10.14710/tataloka.23.1.138-150
Wiyono, R. U. A., Pujianto, A., & Hidayah, E. (2024). Tsunami risk mapping in Tempurejo District, Jember Regency based on BNPB criteria using TOPSIS method. IOP Conference Series: Earth and Environmental Science, 1347(1). https://doi.org/10.1088/1755-1315/1347/1/012057
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