Trapped tsunami waves propagation over curved ocean ridges

Yu Hongquan; Hu Jian; Wang Gang; Zhang Yao; Zheng Jinhai

doi:10.3969/j.issn.0253-4193.2020.01.005

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Yu Hongquan，Hu Jian，Wang Gang, et al. Trapped tsunami waves propagation over curved ocean ridges[J]. Haiyang Xuebao，2020, 42(1)：40–45，doi:10.3969/j.issn.0253−4193.2020.01.005

Citation:

Yu Hongquan，Hu Jian，Wang Gang, et al. Trapped tsunami waves propagation over curved ocean ridges[J]. Haiyang Xuebao，2020, 42(1)：40–45，doi:10.3969/j.issn.0253−4193.2020.01.005

Citation:

Yu Hongquan，Hu Jian，Wang Gang, et al. Trapped tsunami waves propagation over curved ocean ridges[J]. Haiyang Xuebao，2020, 42(1)：40–45，doi:10.3969/j.issn.0253−4193.2020.01.005

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Trapped tsunami waves propagation over curved ocean ridges

doi: 10.3969/j.issn.0253-4193.2020.01.005

Yu Hongquan^1
,,
Hu Jian²,
Wang Gang^{1, 3
,
,},
Zhang Yao⁴,
Zheng Jinhai^{1, 3}

1.
Key Laboratory of Coastal Disaster and Defence, Ministry of Education, Hohai University, Nanjing 210098, China
2.
Yangtze River Shipping Development Research Center, Wuhan 430014, China
3.
College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
4.
National Marine Hazard Mitigation Service, Ministry of Natural Resources, Beijing 100194, China

Received Date: 2019-05-16
Rev Recd Date: 2019-09-02

Available Online: 2021-04-21

Publish Date: 2020-01-25

Abstract

Abstract

Transoceanic tsunami guided by oceanic ridges can propagate to tens of thousands of kilometers away in the form of trapped waves, which threatens the safety in far field. MIKE21-BW was used to simulate trapped waves propagation over ocean ridge with curved degree varying from 0° (straight ridge) to 90° (right-angle ridge) and the energy distribution was examined. The results show that when the trapped waves propagate to the bend of ocean ridge, a little part of the energy leaks out of it and scatters in the other area as free waves. Some of the energy is reflected back and propagate along the ocean ridge in the opposite direction, and it increases with the curved angle of the ocean ridge. The other energy continues to propagate along the curved ocean ridge and it increases with the curved angle of the ocean ridge.
- tsunami,
- curved oceanic ridge,
- trapped waves,
- Boussinesq model

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References(21)

References

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