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Affiliation Department |
Department of Architecture, Civil Engineering and Industrial Management Engineering
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FUKUI Nobuki
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From School
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Kyoto University Graduate School of Engineering Graduated
2019.04 - 2022.03
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Kyoto University Graduate School of Engineering Department of Civil and Earth Resources Engineering Graduated
2017.04 - 2019.03
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Kyoto University Faculty of Engineering Department of Global Engineering Graduated
2013.04 - 2017.03
External Career
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Tottori University Assistant Professor
2022.04 - 2024.09
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Nagoya Institute of Technology Assistant Professor
2024.10
Papers
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Application of a subgrid-scale urban inundation model for a storm surge simulation: Case study of typhoon Haiyan Reviewed
Nobuki Fukui, Nobuhito Mori, Sooyoul Kim, Tomoya Shimura, Takuya Miyashita
Coastal Engineering 104442 - 104442 2023.12
Authorship：Lead author, Corresponding author Publishing type：Research paper (scientific journal) Publisher：Elsevier BV
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NUMERICAL MODELING OF TSUNAMI INUNDATION OVER A COASTAL CITY CONSIDERRING BUILDING VOLUMES Reviewed
Nobuki FUKUI, Nobuhito MORI, Takuya MIYASHITA, Tomoya SHIMURA
Japanese Journal of JSCE 79 ( 17 ) 2023.11
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Research paper (scientific journal)
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Multi-scale Simulation of Subsequent Tsunami Waves in Japan Excited by Air Pressure Waves Due to the 2022 Tonga Volcanic Eruption Reviewed
Takuya Miyashita, Ai Nishino, Tung-Cheng Ho, Tomohiro Yasuda, Nobuhito Mori, Tomoya Shimura, Nobuki Fukui
Pure and Applied Geophysics 2023.08
Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC
Abstract
The 2022 Hunga Tonga-Hunga Ha’apai eruption generated tsunamis that propagated across the Pacific Ocean. Along the coast of Japan, nearshore amplification led to amplitudes of nearly 1 m at some locations, with varying peak tsunami occurrence times. The leading tsunami wave can generally be reproduced by Lamb waves, which are a type of air-pressure wave generated by an eruption. However, subsequent tsunamis that occurred several hours after the leading wave tended to be larger for unknown reasons. This study performs multi-scale numerical simulations to investigate subsequent tsunami waves in the vicinity of Japan induced by air pressure waves caused by the eruption. The atmospheric pressure field was created using a dispersion relation of atmospheric gravity wave and tuned by physical parameters based on observational records. The tsunami simulations used the adaptive mesh refinement method, incorporating detailed bathymetry and topography to solve the tsunami at various spatial scales. The simulations effectively reproduced the tsunami waveforms observed at numerous coastal locations, and results indicate that the factors contributing to the maximum tsunami amplitude differ by region. In particular, bay resonance plays a major role in determining the maximum amplitude at many sites along the east coast of Japan. However, large tsunami amplification at some west coast locations was not replicated, probably because it was caused by amplification during oceanic wave propagation rather than meteorological factors. These findings enhance our understanding of meteotsunami complexity and help distinguish tsunami amplification factors.DOI： 10.1007/s00024-023-03332-9
Other Link： https://link.springer.com/article/10.1007/s00024-023-03332-9/fulltext.html
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EFFICIENT NUMERICAL MODELING OF STORM SURGE INUNDATION OVER METROPOLIS USING INDIVIDUAL DRAG FORCE MODEL AND ADAPTIVE MESH REFINEMENT Reviewed
Nobuki FUKUI, Nobuhito MORI, Sooyoul KIM, Tomoya SHIMURA, Takuya MIYASHITA
Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 78 ( 2 ) I_229 - I_234 2022.11
Authorship：Lead author
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Subgrid-scale modeling of tsunami inundation in coastal urban areas Reviewed
Nobuki Fukui, Nobuhito Mori, Takuya Miyashita, Tomoya Shimura, Katsuichiro Goda
Coastal Engineering 177 104175 - 104175 2022.10
Authorship：Lead author, Corresponding author Publishing type：Research paper (scientific journal) Publisher：Elsevier BV
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Estimating Compounding Storm Surge and Sea Level Rise Effects and Bias Correction Impact when Projecting Future Impact on Volcanic Islands in Oceania. Case Study of Viti Levu, Fiji Reviewed
Audrius Sabunas, Nobuhito Mori, Tomoya Shimura, Nobuki Fukui, Takuya Miyashita
FRONTIERS IN BUILT ENVIRONMENT 8 2022.04
Language：English Publishing type：Research paper (scientific journal) Publisher：FRONTIERS MEDIA SA
Oceania comprises many Small Island Developing States (SIDS), the majority of which are founded on volcanic islands. Small islands are generally vulnerable to the effects of climate change. However, a high number of islands and different coastal morphology make it challenging to accurately estimate climate change impact on this region. Nevertheless, quantifying hazards and thus assessing vulnerability is crucial for policymaking and adaptation efforts regarding SIDS. Meanwhile, Viti Levu is the principal island of Fiji. Therefore, climate change projection in Viti Levu helps estimate how volcanic islands in Oceania will be affected under future climate. This study projects the compound impact of storm surge by tropical cyclone (TC) and SLR on Viti Levu under current and future climate conditions. The primary goal of this study is to estimate the impact of extreme 50- and 100-years return storms on coastal areas and populations. This study also assesses the impact of the bias correction of TC intensity for impact assessment. Even though limited to one island, the results could facilitate the application on other volcanic islands, primarily in Melanesia. Even though Viti Levu is a high island, tropical cyclones can sustain extensive economic damage and result in high numbers of the temporarily displaced population in some low-lying coastal locations. The results show that bias can be significant when comparing observed and estimated datasets, particularly for less intense and future extreme events.
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Uncertainty of storm surge forecast using integrated atmospheric and storm surge model: a case study on Typhoon Haishen 2020 Reviewed
Masaya Toyoda, Nobuki Fukui, Takuya Miyashita, Tomoya Shimura, Nobuhito Mori
Coastal Engineering Journal 64 ( 1 ) 135 - 150 2022.01
Language：English Publishing type：Research paper (scientific journal) Publisher：Informa UK Limited
Hindcast experiments and pseudo-forecast experiments considering Typhoon Haishen (2020) were conducted using an atmospheric (WRF)-storm surge (GeoClaw) coupled model and a storm surge model with a parametric typhoon model. A series of simulations of the coupled model were used to quantify the error sources of the typhoon track and intensity in the forecast errors of storm surges. The results revealed that the typhoon track forecast had a larger error source for the storm surge forecast for the maximum surge height than the typhoon intensity. Furthermore, the parametric Holland typhoon model used in practice has an overestimation trend compared to the coupled model, and the parametric Holland typhoon model using WRF output was able to forecast the storm surge height near the typhoon (western Kyushu area) and its peak occurrence time accurately. However, the forecast accuracy tended to decrease as the distance from the typhoon to the target location increased. The pseudo-ensemble simulation of the storm surge forecast using forecast error information was conducted considering the uncertainty of the typhoon track forecast. The 20 ensemble forecast simulations revealed that the perturbed typhoon track simulation can increase the possibility of capturing the peak time of the storm surge.
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Impact Assessment of Storm Surge and Climate Change-Enhanced Sea Level Rise on Atoll Nations: A Case Study of the Tarawa Atoll, Kiribati Reviewed
Audrius Sabūnas, Takuya Miyashita, Nobuki Fukui, Tomoya Shimura, Nobuhito Mori
Frontiers in Built Environment 7 2021.11
Language：English Publishing type：Research paper (scientific journal) Publisher：Frontiers Media SA
The Pacific region consists of numerous Small Island Developing States (SIDS), one of the most vulnerable to flooding caused by compound effects of sea level rise (SLR) and storms. Nevertheless, individual studies regarding the impact assessment for SIDS, such as the low-lying Kiribati, remain scarce. This study assessed the impact of climate change-induced storm surge and SLR compounding effects on Tarawa, the most populous atoll of Kiribati, the largest coral atoll nation. It projected the impact using a combined dynamic surge and SLR model based on the IPCC AR5 RCP scenarios and 1/100 and 1/50 years return period storm events. This approach allows estimating the inundation scope and the consecutive exposed population by the end of the 21st century. The results of this study show that the pace of SLR is pivotal for Tarawa, as the sea level rise alone can claim more than 50% of the territory and pose a threat to over 60% of the population under the most intense greenhouse gas emissions scenario. Furthermore, most coasts on the lagoon side are particularly vulnerable. In contrast, the contribution of extreme events is generally minimal due to low wind speeds and the absence of tropical cyclones (TC). Despite this, it is clear the compound effects are critical and may inescapably bring drastic changes to the atoll nations by the end of this century. The impact assessment in this study draws attention to the social impact of climate change on SIDS, most notably atoll islands, and evaluates their adaptation potential.
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Variations in Building-Resolving Simulations of Tsunami Inundation in a Coastal Urban Area Reviewed
Nobuki Fukui, Yu Chida, Zhongduo Zhang, Tomohiro Yasuda, Tung-Cheng Ho, Andrew Kennedy, Nobuhito Mori
Journal of Waterway, Port, Coastal, and Ocean Engineering 148 ( 1 ) 2021.11
Authorship：Lead author Language：English Publishing type：Research paper (scientific journal) Publisher：American Society of Civil Engineers (ASCE)
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EFFECTS OF ACCURACY OF SPATIO-TEMPORAL COMPUTATION OF FLUID MODEL AND DIFFERENCES IN INITIAL CONDITION OF DRIFT SIMULATION ON THE ACCURACY OF DRIFT MODEL FOR ACTUAL TOPOGRAPHY Reviewed
Yu CHIDA, Nobuki FUKUI, Nobuhito MORI, Tomohiro YASUDA
Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 77 ( 2 ) I_331 - I_336 2021.11
Language：Japanese
Books and Other Publications
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Storm Surge Forecasting and Future Projection in Practice: Scope of Application of Empirical Typhoon Models
Masaya Toyoda, Nobuki Fukui（ Role： Joint author）
CRC Press 2024.10
Scientific Research Funds Acquisition Results
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建物スケールの物理過程を考慮した津波・高潮浸水サブグリッドモデルの高度化
Grant number：24K17357 2024.04 - 2027.03
日本学術振興会 科学研究費助成事業 若手研究
福井 信気
Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）
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令和6年能登半島地震津波による浸水被害調査に基づく市街地浸水モデルの高度化
Grant number：2024-GC02 2024.04 - 2026.03
京都大学防災研究所 京都大学防災研究所一般共同研究
Authorship：Principal investigator
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Estimation of probability and maximum potential intensity of extreme coastal hazards using global and regional integrated models
Grant number：23H00196 2023.04 - 2027.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
Authorship：Coinvestigator(s)
Grant amount：\46800000 （ Direct Cost: \36000000 、 Indirect Cost：\10800000 ）
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Experimental proof of coastal rogue waves
Grant number：22KK0057 2022.10 - 2026.03
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research (B)) Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))
Grant amount：\19630000 （ Direct Cost: \15100000 、 Indirect Cost：\4530000 ）
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浅海域・堤防・陸域における水理現象をシームレスに考慮した高潮浸水モデルの開発
Grant number：22K20447 2022.08 - 2024.03
日本学術振興会 科学研究費助成事業 研究活動スタート支援 研究活動スタート支援
福井 信気
Grant amount：\2860000 （ Direct Cost: \2200000 、 Indirect Cost：\660000 ）
Teaching Experience
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プログラミング演習
2023.04 - 2024.09 Institution：Tottori University
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力学基礎及び演習
2022.04 - 2024.09 Institution：Tottori University
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計算機システム演習
2022.04 - 2024.09 Institution：Tottori University
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土木・社会経営プロジェクト
2022.04 - 2024.09 Institution：Tottori University