Simulation and analysis of storm surge at Zhoushan fishing port

Sun Zhilin; Zhong Shanhong; Wang Chen; Tu Wenrong; Ji Hanqing

doi:10.3969/j.issn.0253-4193.2020.01.014

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Sun Zhilin，Zhong Shanhong，Wang Chen, et al. Simulation and analysis of storm surge at Zhoushan fishing port[J]. Haiyang Xuebao，2020, 42(1)：136–143，doi:10.3969/j.issn.0253−4193.2020.01.014

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Simulation and analysis of storm surge at Zhoushan fishing port

doi: 10.3969/j.issn.0253-4193.2020.01.014

Institute of Port Channel and Offshore Engineering, Zhejiang University, Hangzhou 310058, China

Received Date: 2018-11-10
Rev Recd Date: 2019-03-02

Available Online: 2021-04-21

Publish Date: 2020-01-25

Abstract

Abstract

There is a great significance to study the storm surge in the disaster prevention and mitigation of fishing port. This paper constructs a storm surge numerical model with the nested gird at Zhoushan fishing port, and the calculated results of astronomical tide and storm tide are in a good agreement with the practice. Fourteen typhoon paths in 5 directions are designed, and the storm tide level of Zhoushan fishing port is calculated under the typhoon of 12−17 level during the great tide period of August 8−12, 2017. The results show that storm tide peak in SE path on the south side is 35.7% higher than the north E path due to the effect of the shore wind, and the difference can reach 82 cm. The Zhoushan fishing port passes through sea at both ends, and the wind direction is consistent with the east exit door and oblique to the fishing port at 0.5R SE path on the south side typhoon, which is beneficial to the water entering and staying. At this time, the storm tidal level is the highest. The 12 typhoon level of ESE, SE and SSE paths on the south side causes overflow. There is no risk of typhoon landing on the north side, and because of the settlement and other reasons, the seawalls’ defense capacities of two sides are lower than the middle section. According to numerical experiments, when a spur dike is installed on the east side of Xiaogan Island, the probability of overflow under the situation of the 17 typhoon level can be reduced from 26.23% to 10.66%.
- storm tide,
- typhoon,
- numerical simulation,
- fishing port

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References

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