Inundation Characteristics in Arida City Due to Overtopping Waves Induced by 2018 Typhoon Jebi

Yamanaka, Yusuke; Shibata, Ryotaro; Tajima, Yoshimitsu; Okami, Naoko

doi:10.1007/978-981-15-0291-0_28

Cited by 2 publications

(3 citation statements)

References 10 publications

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“…Figure 15 shows the resulting significant wave height and peak period, which agree well with measurements, with RMSE of 0.7 m and 1.9 s, respectively. Breaking-wave-induced water level set-up is approximated as 5% of the significant wave height at the shoreline (Feng et al 2011;Yamanaka et al 2020).…”

Section: Wave Modelmentioning

confidence: 99%

An integrated framework of coastal flood modelling under the failures of sea dikes: a case study in Shanghai

Yin

Bricker

et al. 2021

Nat Hazards

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Climate change leads to sea level rise worldwide, as well as increases in the intensity and frequency of tropical cyclones (TCs). Storm surge induced by TC’s, together with spring tides, threatens to cause failure of flood defenses, resulting in massive flooding in low-lying coastal areas. However, limited research has been done on the combined effects of the increasing intensity of TCs and sea level rise on the characteristics of coastal flooding due to the failure of sea dikes. This paper investigates the spatial variation of coastal flooding due to the failure of sea dikes subject to past and future TC climatology and sea level rise, via a case study of a low-lying deltaic city- Shanghai, China. Using a hydrodynamic model and a spectral wave model, storm tide and wave parameters were calculated as input for an empirical model of overtopping discharge rate. The results show that the change of storm climatology together with relative sea level rise (RSLR) largely exacerbates the coastal hazard for Shanghai in the future, in which RSLR is likely to have a larger effect than the TC climatology change on future coastal flooding in Shanghai. In addition, the coastal flood hazard will increase to a large extent in terms of the flood water volume for each corresponding given return period. The approach developed in this paper can also be utilized to investigate future flood risk for other low-lying coastal regions.

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Section: Wave Modelmentioning

confidence: 99%

An integrated framework of coastal flood modelling under the failures of sea dikes: a case study in Shanghai

Yin

Bricker

et al. 2021

Nat Hazards

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“…According to witnesses, the inundation height and depth were approximately TP + 3.5 and 1.7 m, respectively. Debris also remained on a small coast near the harbor, and the ground level of the debris was nearly TP + 3.5 m. Minatomachi, in Arida City (Figure 1), was severely inundated with a ground level of approximately TP + 3 m, and the city was protected by a seawall with a crown height of around TP + 5-7 m [13,18]. Based on photographs taken during and after the typhoon, Yamanaka et al [18] determined that the maximum inundation depth in the area was 0.6 m and also mentioned that wave overtopping was the primary cause of inundation.…”

Section: Damage Caused By Typhoon Jebimentioning

confidence: 99%

“…In recent disasters, several video footages were recorded by local residents, and analysis of these footages could be extremely valuable for enhanced understanding of such complex nearshore hydrodynamic characteristics [26,27]. Because Typhoon Jebi passed near Wakayama in the daytime, several pictures and video footages were recorded by local residents [13,18]. Among the collected video footages, this study focused on two videos that clearly captured the behavior of nearshore waves at different sites ( Figure 10) and image analyses were conducted to extract quantitative characteristics of the captured nearshore hydrodynamics.…”

Section: Image Analysis Of Video Footage Recorded At the Coastmentioning

confidence: 99%

Nearshore Dynamics of Storm Surges and Waves Induced by the 2018 Typhoons Jebi and Trami Based on the Analysis of Video Footage Recorded on the Coasts of Wakayama, Japan

Yamanaka

Matsuba

Tajima

et al. 2019

JMSE

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In this study, field surveys along the coasts of Wakayama Prefecture, Japan, were first conducted to investigate the coastal damage due to storm surges and storm-induced waves caused by the 2018 Typhoons Jebi and Trami. Special focus was placed on the characteristic behavior of nearshore waves through investigation of observed data, numerical simulations, and image analysis of video footage recorded on the coasts. The survey results indicated that inundation, wave overtopping, and drift debris caused by violent storm-induced waves were the dominant factors causing coastal damage. Results of numerical simulations showed that heights of storm-induced waves were predominantly greater than storm surge heights along the entire coast of Wakayama in both typhoons. However, computed gradual alongshore variations in wave and surge heights did not explain locally-concentrated inundation and run-up heights observed along the coasts. These results indicate that complex nearshore hydrodynamics induced by local nearshore bathymetry might have played a significant role in inducing such local wave characteristics and the associated coastal damage. Analysis of video footage recorded during Typhoon Jebi, for example, clearly showed evidence of amplified infragravity wave components, which could enhance inundation and wave run-up.

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Inundation Characteristics in Arida City Due to Overtopping Waves Induced by 2018 Typhoon Jebi

Cited by 2 publications

References 10 publications

An integrated framework of coastal flood modelling under the failures of sea dikes: a case study in Shanghai

An integrated framework of coastal flood modelling under the failures of sea dikes: a case study in Shanghai

Nearshore Dynamics of Storm Surges and Waves Induced by the 2018 Typhoons Jebi and Trami Based on the Analysis of Video Footage Recorded on the Coasts of Wakayama, Japan

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