Physical and Numerical Modelling of Tsunami Run-up on Seawall at Sloping Beach

https://doi.org/10.22146/jcef.43800

Ma'ruf Hadi Sutanto(1*)

(1) Balai Penelitian dan Pengembangan Pantai, Kementerian PUPR, Indonesia
(*) Corresponding Author

Abstract


Tsunami run-up on land has a large destructive power. Further studies are deemed necessary to understand the process and characteristics of tsunami run-up in coastal areas. Seawall structures can reduce the run-up of a tsunami depending on the height of the seawall crest. Physical modeling shows that seawall may significantly reduce run-up (𝑅) and inundation (𝑋𝑖). The highest reduction up to 55% where the seawall peak height is 7 cm and the water depth is 15 cm. With the same scenario in numerical modeling, the percentage reduction is 67.53%. The highest inundation (Xi) in the scenario without seawall structure is 6.081 m when the initial water depth (d0) equals to 30 cm. The result of the numerical model for the same scenario is 6.970 m. Seawall as tsunami mitigation structure is only effective when the tsunami wave is relatively low compared to the seawall height (H/ sw). Reduction percentage > 25%, with conditions that H/ sw is < 0.856 (physical model) and < 0.802 (numerical model).

Keywords


Run-up; Tsunami; TUNAMI; Physical model; Numerical model

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References

Arana, A. M. H. (2017) ‘Wave run-up on beaches and coastal structures’. UCL (University College London).

Benazir, Triatmadja, R., Raharjo, A. P. & Yuwono, N. (2016) ‘Studi Interaksi Gelombang Tsunami terhadap Struktur Mitigasi dan Pengaruhnya dalam Pembentukan Run-up di Daratan Pantai. Semarang’, in HATHI.

Benazir (2016) Usulan Penelitian untuk Disertasi : Pengembangan Metode Simulasi Run-Up Tsunami dan Aplikasinya pada Beberapa Kasus Tsunami di Indonesia. Yogyakarta.

Bock, Y. et al. (2003) ‘Crustal motion in Indonesia from global positioning system measurements’, Journal of Geophysical Research: Solid Earth. Wiley Online Library, 108(B8).

Bryant, E. (2014) Tsunami: the underrated hazard. Springer.

Cummins, P. R., Kong, L. S. L. and Satake, K. (2008) ‘Introduction to “Tsunami Science Four Years After the 2004 Indian Ocean Tsunami, Part I: Modelling and Hazard Assessment”’, in Tsunami Science Four Years after the 2004 Indian Ocean Tsunami. Springer, pp. 1983–1989.

Goto, C. et al. (1992) ‘Numerical method of tsunami simulation with the leap-frog scheme’, Translated for the TIME project by N Shuto.

Heller, V. (2011) ‘Scale effects in physical hydraulic engineering models’, Journal of Hydraulic Research. Taylor & Francis, 49(3), pp. 293–306.

Holthuijsen, L. H. (2010) Waves in oceanic and coastal waters. Cambridge university press.

Imamura, F., Yalciner, A. C. and Ozyurt, G. (2006) ‘Tsunami modelling manual’, UNESCO IOC international training course on Tsunami Numerical Modelling.

Løvholt, F. et al. (2014) ‘Tsunami risk reduction–are we better prepared today than in 2004?’, International journal of disaster risk reduction. Elsevier, 10, pp. 127–142.

Nakaya, N. et al. (2018) ‘Effect of tsunami drill experience on evacuation behavior after the onset of the Great East Japan Earthquake’, International journal of disaster risk reduction. Elsevier, 28, pp. 206–213.

Nateghi, R. et al. (2016) ‘Statistical analysis of the effectiveness of seawalls and coastal forests in mitigating tsunami impacts in iwate and miyagi prefectures’, PloS one. Public Library of Science, 11(8), p. e0158375.

Naylor, A., Walker, J. F. and Suppasri, A. (2018) ‘Suitability of the early warning systems and temporary housing for the elderly population in the immediacy and transitional recovery phase of the 2011 Great East Japan Earthquake and Tsunami’, International journal of disaster risk reduction. Elsevier, 31, pp. 302–310.

Parwanto, N. B. and Oyama, T. (2014) ‘A statistical analysis and comparison of historical earthquake and tsunami disasters in Japan and Indonesia’, International Journal of Disaster Risk Reduction. Elsevier, 7, pp. 122–141.

Pile, J. et al. (2018) ‘Can the risk of coastal hazards be better communicated?’, International journal of disaster risk reduction. Elsevier, 27, pp. 439–450.

Raby, A. et al. (2015) ‘Implications of the 2011 Great East Japan Tsunami on sea defence design’, International Journal of Disaster Risk Reduction. Elsevier, 14, pp. 332–346.

Sriram, V. et al. (2016) ‘Tsunami evolution and run-up in a large scale experimental facility’, Coastal Engineering. Elsevier, 111, pp. 1–12.

Strusińska-Correia, A. (2017) ‘Tsunami mitigation in Japan after the 2011 Tōhoku Tsunami’, International journal of disaster risk reduction. Elsevier, 22, pp. 397–411.

Suppasri, A. et al. (2012) ‘Mapping of historical tsunamis in the Indian and Southwest Pacific Oceans’, International Journal of Disaster Risk Reduction. Elsevier, 1, pp. 62–71.

Synolakis, C. E. et al. (2008) ‘Validation and verification of tsunami numerical models’, in Tsunami Science Four Years after the 2004 Indian Ocean Tsunami. Springer, pp. 2197–2228.

Tomiczek, T. et al. (2016) ‘Physical modelling of tsunami onshore propagation, peak pressures, and shielding effects in an urban building array’, Coastal Engineering. Elsevier, 117, pp. 97–112.

Triatmadja, R. and Nurhasanah, A. (2012) ‘Tsunami force on buildings with openings and protection’, Journal of Earthquake and tsunami. World Scientific, 6(04), p. 1250024.

Triatmodjo, B. (2006) Perencanaan bangunan pantai. Beta Offset.

Wang, D. (2015) ‘An Ocean Depth-Correction Method For Reducing Model Errors In Tsunami Travel Time: Application To The 2010 Chile and 2011 Tohoku Tsunamis.’, Science of Tsunami Hazards, 34(1).

White, I. and Haughton, G. (2017) ‘Risky times: Hazard management and the tyranny of the present’, International journal of disaster risk reduction. Elsevier, 22, pp. 412–419.

Yeh, H. H. (1991) ‘Tsunami bore runup’, in Tsunami hazard. Springer, pp. 209–220.

Yeh, H. H., Ghazali, A. and Marton, I. (1989) ‘Experimental study of bore run-up’, Journal of fluid Mechanics. Cambridge University Press, 206, pp. 563–578.



DOI: https://doi.org/10.22146/jcef.43800

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