Volume 13 Issue 2
Jul.  2022
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Chun Hui, Lixin Ning, Changxiu Cheng. Risk Assessment of Tsunamis Along the Chinese Coast Due to Earthquakes[J]. International Journal of Disaster Risk Science, 2022, 13(2): 275-290. doi: 10.1007/s13753-022-00407-4
Citation: Chun Hui, Lixin Ning, Changxiu Cheng. Risk Assessment of Tsunamis Along the Chinese Coast Due to Earthquakes[J]. International Journal of Disaster Risk Science, 2022, 13(2): 275-290. doi: 10.1007/s13753-022-00407-4

Risk Assessment of Tsunamis Along the Chinese Coast Due to Earthquakes

doi: 10.1007/s13753-022-00407-4
Funds:

This research was supported by the National Natural Science Foundation of China (Grant No. 41771537) and the Fundamental Research Funds for the Central Universities.

  • Available Online: 2022-07-06
  • China’s coastal areas are densely populated, economically developed, and located in close proximity to several potential tsunami sources; therefore, tsunami risk cannot be ignored. This study assessed tsunami risk in coastal areas of China by developing a framework for tsunami risk assessment from the perspectives of hazards, vulnerability, and exposure. First, a probabilistic tsunami hazard assessment (PTHA) model was applied to estimate the potential tsunami sources in both local crustal faults and circum-Pacific subduction zones based on numerical simulations. The output of the PTHA includes tsunami wave height distributions along the coast. Then, an indicator system reflecting exposure and vulnerability to tsunamis in the coastal areas of China was established by using the entropy method and analytic hierarchy process. The PTHA findings show that the tsunami wave height is close to 3 m on the southern coast of the Bohai Sea, the Pearl River Estuary, and the Yangtze River Delta and exceeds 2 m near the Taiwan Strait for the 2000-year return period. The results of the tsunami risk assessment show that the cities at the highest risk level (level I) include Tangshan, Yantai, and Hong Kong, while cities at the high risk level (level II) include Fuzhou, Xiamen, and Quanzhou near the Taiwan Strait and many cities on the Yangtze River Delta, the Pearl River Estuary, and the southern coast of the Bohai Sea. Our findings can provide an understanding of differences in tsunami risk between Chinese coastal cities that may be affected by tsunamis in the future.
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