Estimation and Projection of Non-Linear Relative Sea-Level Rise in the Seto Inland Sea, Japan

Lee, Han Soo; Kaneko, Arata

doi:10.1080/07055900.2015.1069254

Cited by 7 publications

(3 citation statements)

References 39 publications

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“…From the perspective of security, superposing method is acceptable but in consideration of economy for the designing and construction of coastal defense infrastructure, it may not be appropriate. Compared to the studies on the tsunami-tide interaction (e.g., Lee et al, 2015;Kowalik et al, 2006), tides in the open sea do not have dramatic effects on tsunami wave propagation such that a linear superposing method can be applied for sea level variation. In concurrent cases of our study, storm surge elevates the whole water level in the bay including that of coastal areas when typhoon passing, which may weaken the tsunami wave shoaling compared to only tsunami case (starting from still water).…”

Section: Multi-hazard Vulnerabilitymentioning

confidence: 97%

Numerical assessment of coastal multihazard vulnerability in Tokyo Bay

et al. 2022

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Many bays in the world are threatened by coastal hazards such as storm surge, river flood and tsunami.Since most of the existing studies have been focused on one or two of them, in this study, the assessment of coastal vulnerability caused by the three hazards was the research target. Inundation simulation is a widely used and straightforward way in coastal vulnerability assessments; however, it is computationally expensive, and considering an increase in the number of cases in multi-hazard analysis, an efficient method was proposed using an estimated overflow volume without computing inundation, which was validated by comparing with inundation simulation. It shows that when free overflow is dominant, this method is consistent with inundation simulation approach. Using Tokyo Bay as a study area, the efficient method was then applied to multi-hazard vulnerability assessment. By comparing the overflow volume maps and maximum anomaly distribution along the coasts for four types of hazards (worst storm surge; worst concurrent storm surge and river flood; worst concurrent storm surge, river flood and Tokai-Tonankai earthquake tsunami; worst concurrent storm surge, river flood and Tokyo inland earthquake tsunami), we investigated the characteristics of different types of hazards and identified the difference between single hazard and multi-hazards. The characteristic of overflow volume along the coasts is similar to that of maximum anomaly distribution, especially for only storm surge case, the multi-hazard case combining storm surge and river flood, and the multi-hazard case combining storm surge, Tokyo inland earthquake tsunami and river flood. However, for multihazard case combining storm surge, Tokai-Tonankai earthquake tsunami and river flood, only by the maximum anomaly distribution, it cannot reflect the real overflow volume condition. For only storm surge case and multi-hazard case combining storm surge and river flood, the head of the bay suffers the highest vulnerability while for multihazard cases combining storms surge, tsunami and river flood, the difference of vulnerability in the north and south of the bay is not significant. The difference of superposing method and concurrent method for computing multihazards was also compared. It was found that the linear superposing method tends to overestimate the total water elevation in coastal region; however, in the coasts where superposing method underestimates the multi-hazard anomalies, upgrading dikes needs to be considered by policymakers.

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Section: Multi-hazard Vulnerabilitymentioning

confidence: 97%

Numerical assessment of coastal multihazard vulnerability in Tokyo Bay

et al. 2022

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“…The potential Takai-Tonankai-Nankai-linked earthquake and tsunami source region along the Nankai Trough, which was revised and issued by the Central Disaster Prevention Council, Japan (modified from Figure V Journal of Geophysical Research: Oceans 10.1002/2015JC010995 Japan, the tide and tidal currents are high and very strong and are dominant physical processes in the SIS's coastal environment. Therefore, taking the impacts of tides and tidal currents on extreme tsunami propagation in the SIS into account is critical for coastal protection and disaster prevention [Lee and Kaneko, 2015;Lee et al, 2010;Shimoyama and Lee, 2014].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, taking the impacts of tides and tidal currents on extreme tsunami propagation in the SIS into account is critical for coastal protection and disaster prevention [Lee and Kaneko, 2015;Lee et al, 2010;Shimoyama and Lee, 2014].…”

Section: 1002/2015jc010995mentioning

confidence: 99%

Impacts of tides on tsunami propagation due to potential Nankai Trough earthquakes in the Seto Inland Sea, Japan

2015

Self Cite

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The impacts of tides on extreme tsunami propagation due to potential Nankai Trough earthquakes in the Seto Inland Sea (SIS), Japan, are investigated through numerical experiments. Tsunami experiments are conducted based on five scenarios that consider tides at four different phases, such as flood, high, ebb, and low tides. The probes that were selected arbitrarily in the Bungo and Kii Channels show less significant effects of tides on tsunami heights and the arrival times of the first waves than those that experience large tidal ranges in inner basins and bays of the SIS. For instance, the maximum tsunami height and the arrival time at Toyomaesi differ by more than 0.5 m and nearly 1 h, respectively, depending on the tidal phase. The uncertainties defined in terms of calculated maximum tsunami heights due to tides illustrate that the calculated maximum tsunami heights in the inner SIS with standing tides have much larger uncertainties than those of two channels with propagating tides. Particularly in Harima Nada, the uncertainties due to the impacts of tides are greater than 50% of the tsunami heights without tidal interaction. The results recommend simulate tsunamis together with tides in shallow water environments to reduce the uncertainties involved with tsunami modeling and predictions for tsunami hazards preparedness.

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Linear and non-linear trends of sea level from tide gauges along the coastline of Bangladesh

Amin,

Hasan

2024

Regional Studies in Marine Science

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Estimation and Projection of Non-Linear Relative Sea-Level Rise in the Seto Inland Sea, Japan

Cited by 7 publications

References 39 publications

Numerical assessment of coastal multihazard vulnerability in Tokyo Bay

Numerical assessment of coastal multihazard vulnerability in Tokyo Bay

Impacts of tides on tsunami propagation due to potential Nankai Trough earthquakes in the Seto Inland Sea, Japan

Linear and non-linear trends of sea level from tide gauges along the coastline of Bangladesh

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