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Bennett, W G and Karunarathna, H (2019) Coastal flood alleviation through management interventions under changing climate conditions. International Journal of Disaster Resilience in the Built Environment, 11(02), 187–203.

Haigh, R, Sakalasuriya, M M, Amaratunga, D, Basnayake, S, Hettige, S, Premalal, S and Jayasinghe Arachchi, A (2020) The upstream-downstream interface of Sri Lanka’s tsunami early warning system. International Journal of Disaster Resilience in the Built Environment, 11(02), 219–40.

Hamza, M and Månsson, P (2019) The human dimension of early warning – a viewpoint. International Journal of Disaster Resilience in the Built Environment, 11(02), 263–74.

Hanggara, D and Wijeyewickrema, A C (2019) Vulnerability assessment of reinforced concrete buildings in Indonesia subjected to tsunami inundation forces. International Journal of Disaster Resilience in the Built Environment, 11(02), 204–18.

Rahayu, H P, Comfort, L K, Haigh, R, Amaratunga, D and Khoirunnisa, D (2020) A study of people-centered early warning system in the face of near-field tsunami risk for Indonesian coastal cities. International Journal of Disaster Resilience in the Built Environment, 11(02), 241–62.

Randil, C, Siriwardana, C and Hewawasam, K (2019) Framework to analyze Sri Lanka disaster management mechanism. International Journal of Disaster Resilience in the Built Environment, 11(02), 289–307.

Rathnayake, D K, Kularatne, D, Abeysinghe, S, Shehara, I, Fonseka, T, Edirisinghe Mudiyanselage, S D J, Kamalrathne, W G C T, Siriwardana, C, Alagiyawanna Mohotti Appuhamilage, C S B and Dissanayake, R (2020) Barriers and enablers of coastal disaster resilience – lessons learned from tsunami in Sri Lanka. International Journal of Disaster Resilience in the Built Environment, 11(02), 275–88.

Wickramaratne, S, Wirasinghe, S C and Ruwanpura, J (2019) An update of proposed Sri Lanka warning system for east and west coast tsunamis. International Journal of Disaster Resilience in the Built Environment, 11(02), 169–86.

Wijetunge, J J (2019) A multi-scenario assessment of the seismogenic tsunami hazard for Bangladesh. International Journal of Disaster Resilience in the Built Environment, 11(02), 156–68.

  • Type: Journal Article
  • Keywords: Numerical simulations; Coastal flooding; Disaster risk mitigation; Indian Ocean region; Shallow water equations; Tsunami amplitude;
  • ISBN/ISSN: 1759-5908
  • URL: https://doi.org/10.1108/IJDRBE-07-2019-0047
  • Abstract:
    This paper aims to describe a multi-scenario assessment of the seismogenic tsunami hazard for Bangladesh from active subduction zones in the Indian Ocean region. Two segments of the Sunda arc, namely, Andaman and Arakan, appear to pose a tsunamigenic seismic threat to Bangladesh. Design/methodology/approach High-resolution numerical simulations of tsunami propagation toward the coast of Bangladesh have been carried out for eight plausible seismic scenarios in Andaman and Arakan subduction zones. The numerical results have been analyzed to obtain the spatial variation of the maximum tsunami amplitudes as well as tsunami arrival times for the entire coastline of Bangladesh. Findings The results suggest that the tsunami heights are amplified on either side of the axis of the submarine canyon which approaches the nearshore sea off Barisal in the seaboard off Sundarban–Barisal–Sandwip. Moreover, the computed tsunami amplitudes are comparatively higher north of the latitude 21.5o in the Teknaf–Chittagong coastline. The calculated arrival times indicate that the tsunami waves reach the western half of the Sundarban–Barisal–Sandwip coastline sooner, while shallow water off the eastern half results in a longer arrival time for that part of the coastline, in the event of an earthquake in the Andaman seismic zone. On the other hand, most parts of the Chittagong–Teknaf coastline would receive tsunami waves almost immediately after an earthquake in the northern segment of the Arakan seismic zone. Originality/value The present assessment includes probabilistic measures of the tsunami hazard by incorporating several probable seismic scenarios corresponding to recurrence intervals ranging from 25 years to over 1,000 years.