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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/nhess-2020-355
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2020-355
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  28 Oct 2020

28 Oct 2020

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This preprint is currently under review for the journal NHESS.

Tsunami damage to ports: Cataloguing damage to create fragility functions from the 2011 Tohoku event

Constance Ting Chua1,2, Adam D. Switzer1,2, Anawat Suppasri3, Linlin Li4, Kwanchai Pakoksung3, David Lallemant1,2, Susanna F. Jenkins1,2, Ingrid Charveta, Terence Chua1, Amanda Cheong5, and Nigel Winspearb Constance Ting Chua et al.
  • 1Asian School of the Environment, Nanyang Technological University, Singapore
  • 2Earth Observatory of Singapore, Nanyang Technological University, Singapore
  • 3International Research Institute of Disaster Science, Tohoku University, Sendai, Japan
  • 4School of Earth Sciences and Engineering, Sun Yat-Sen University, Guangzhou, China
  • 5JBA Risk Management Pte Ltd, Singapore
  • aformerly at: Department of Statistical Science, University College London, London, United Kingdom
  • bformerly at: SCOR Global P&C, Singapore

Abstract. Modern tsunami events have highlighted the vulnerability of port structures to these high-impact but infrequent occurrences. However, port planning rarely includes adaptation measures to address tsunami hazards. The 2011 Tohoku tsunami presented us with an opportunity to characterise the vulnerability of port industries to tsunami impacts. Here, we provide a spatial assessment and photographic interpretation of freely available data sources. Approximately 5,000 port structures were assessed for damage and stored in a database. Using the newly developed damage database, tsunami damage is quantified statistically for the first time, through the development of damage fragility functions for eight common port industries. In contrast to tsunami damage fragility functions produced for buildings from existing damage database, our fragility functions showed higher prediction accuracies (up to 75 % accuracy). Pre-tsunami earthquake damage was also assessed in this study, and was found to influence overall damage assessment. The damage database and fragility functions for port industries can inform structural improvements and mitigation plans for ports against future events.

Constance Ting Chua et al.

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Tsunami damage to ports: Cataloguing damage to create fragility functions from the 2011 Tohoku event Chua, C. T., Switzer, A. D., Suppasri, A., Li, L., Pakoksung, K., Lallemant, D., Jenkins, S., Charvet, I., Chua, T., Cheong, A. and Winspear, N. https://doi.org/10.21979/N9/OTZMT1

Constance Ting Chua et al.

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Short summary
Port assets are vulnerable to the physical damage caused by tsunamis. Ports are critical nodes in international trade and disruptions to ports would affect global supply chain. For the first time, tsunami damage data is being extensively collected for port structures and catalogued into a database. The study also provides vulnerability curves which describe the probability of damage for different port industries in different tsunami intensities.
Port assets are vulnerable to the physical damage caused by tsunamis. Ports are critical nodes...
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