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https://doi.org/10.5194/nhess-2019-425
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2019-425
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 05 Feb 2020

Submitted as: research article | 05 Feb 2020

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This preprint is currently under review for the journal NHESS.

Simulation of storm surge inundation under different typhoon intensity scenarios: Case study of Pingyang County, China

Xianwu Shi1,3, Pubing Yu2, Zhixing Guo1, Fuyuan Chen2, Xiuguang Wu2, Zhilin Sun3, Wenlong Cheng2, and Jian Zeng2 Xianwu Shi et al.
  • 1National Marine Hazard Mitigation Service, Beijing, 100194, China
  • 2Zhejiang Institute of Hydraulics and Estuary, Hangzhou, 310020, China
  • 3Zhejiang University, Hangzhou, 310058, China

Abstract. China is one of the countries that are most seriously affected by storm surges. In recent years, storm surges in coastal areas of China have caused huge economic losses and a large number of human casualties. Knowledge of the inundation range and water depth of storm surges under different typhoon intensities could assist pre-disaster risk assessment and making evacuation plans, as well as provide decision support for responding to storm surges. Based on historical typhoon-induced storm surges in the study area of Pingyang County in Zhejiang Province, China, key parameters including typhoon tracks, radius of maximum wind speed, astronomical tide, and upstream flood runoff were determined for different typhoon intensities. Numerical simulations were conducted using these parameters to investigate the inundation range and water depth distribution of storm surges in Pingyang County under five different intensity scenarios (915, 925, 935, 945, and 965 hPa) with consideration of the impact of seawall collapse. The simulation results show that the range of storm surge inundation expands with increasing typhoon intensity. The scenario with the most intense typhoon (915 hPa) had the most adverse track, with an associated area of inundation of 233 km2 that included most areas of the town of Aojiang, eastern areas of Wanquan, northern areas of Songbu, as well as parts of Kunyang and Shuitou.

Xianwu Shi et al.

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Short summary
This study presents a method for setting typhoon track, radius of maximum wind speed, astronomical tide, and upstream runoff under different typhoon intensity scenarios. Taking Pingyang County as an example, the inundation range and water depth distribution corresponding to the storm surges under different typhoon intensity scenarios were simulated in combination with the numerical model. The results could provide reference for the establishment of storm surge disaster risk assessment method.
This study presents a method for setting typhoon track, radius of maximum wind speed,...
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