Numerical Simulation of Urban Inundation Processes and Their Hydraulic Quantities – Tsunami Analysis Hackathon Theme 1 –
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- Yasuda Tomohiro
- Faculty of Environmental and Urban Engineering, Kansai University
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- Imai Kentaro
- Yokohama Institute for Earth Sciences, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
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- Shigihara Yoshinori
- Department of Civil and Environmental Engineering, National Defense Academy (NDA)
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- Arikawa Taro
- Faculty of Science and Engineering, Chuo University
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- Baba Toshitaka
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University
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- Chikasada Naotaka
- Earthquake and Tsunami Research Division, National Research Institute for Earth Science and Disaster Resilience (NIED)
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- Eguchi Yuuki
- Department of Civil and Environmental Engineering, National Defense Academy (NDA)
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- Kamiya Masato
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University
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- Minami Masaaki
- Meteorological Research Institute, Japan Meteorological Agency (JMA)
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- Miyauchi Toshiharu
- Faculty of Science and Engineering, Chuo University
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- Nojima Kazuya
- R&D Center, Nippon Koei Co., Ltd.
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- Pakoksung Kwanchai
- International Research Institute of Disaster Science (IRIDeS), Tohoku University
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- Suppasri Anawat
- International Research Institute of Disaster Science (IRIDeS), Tohoku University
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- Tominaga Yuho
- IDEA Consultants, Inc.
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抄録
<p>The detailed understanding of tsunami hazard risk using numerical simulations requires a numerical model that can accurately predict tsunami inundation phenomena on land. In such models, the structural effects are indirectly considered using the variation of bottom roughness as a proxy for the differences in building densities. Only a few studies have conducted intermodel tests to investigate tsunami inundation in complex coastal urban cities. During the tsunami analysis hackathon held in September 2020, eight research groups met to have a detailed discussion on the current urban inundation problems. In this study, we conducted an intermodel comparison of the numerical tsunami models, using the data from physical experiments that were performed on a detailed urban model. Our objective was to investigate the necessary conditions of an accurate numerical model based that can ensure high reproducibility and practicality. It was confirmed that the accuracy of topographic data is an important parameter for tsunami inundation simulations in complex urban areas. Based on the computational cost and accuracy, we suggest that a resolution of 1 cm of topographic data is a sufficient condition for tsunami inundation simulations on 1/250 scale model.</p>
収録刊行物
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- Journal of Disaster Research
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Journal of Disaster Research 16 (7), 978-993, 2021-10-01
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