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原文传递 Variations in Building-Resolving Simulations of Tsunami Inundation in a Coastal Urban Area

题名：	Variations in Building-Resolving Simulations of Tsunami Inundation in a Coastal Urban Area
正文语种：	eng
作者：	Nobuki Fukui;Yu Chida;Zhongduo Zhang;Tomohiro Yasuda;Tung-Cheng Ho;Andrew Kennedy;Nobuhito Mori
作者单位：	Dept. of Civil and Earth Resources Engineering Graduate School of Engineering Kyoto Univ. Kyoto 615-8530 Japan;Tsunami and Storm Surge Group Port and Airport Research Institute Yokosuka Kanagawa 239-0826 Japan Dept. of Civil and Earth Resources Engineering Graduate School of Engineering Kyoto Univ. Kyoto 615-8530 Japan;Dept. of Civil and Environmental Engineering and Earth Sciences Univ. of Notre Dame Notre Dame IN 46556;Dept. of Civil Environmental and Applied Systems Engineering Kansai Univ. Suita Osaka 564-8680 Japan;Disaster Prevention Research Institute Kyoto Univ. Uji Kyoto 611-0011 Japan;Dept. of Civil and Environmental Engineering and Earth Sciences Univ. of Notre Dame Notre Dame IN 46556;Disaster Prevention Research Institute Kyoto Univ. Uji Kyoto 611-0011 Japan Swansea Univ. Bay Campus Fabian Way Crymlyn Burrows Swansea SA1 8EN UK
摘要：	The direct simulation of inundation in developed urban areas presents a much greater challenge than the more common bare earth simulations that use roughness, which are used in many tsunami studies. This study intercompares the performance of four longwave models for tsunami inundation on a detailed topographical model of Kainan, Wakayama, Japan, with laboratory results. All simulations include buildings, which have a large impact on overland flood propagation. Inter-model comparisons yield several apparent characteristics: (1) variations between models were small in areas that are always wet; (2) wetting, drying, and overland propagation increased inter-model variation in the inundation front arrival time, maximum water surface elevation, and overland flow velocities; (3) inundated areas and maximum water surface elevations show lower inter-model variation (Ⅴ) than inundation front velocity and maximum current velocities. Sources for V appeared to occur from differences in wetting, drying, and detailed code implementation rather than major differences in model physics. Using published tsunami fragility models, V led to significant differences in the predicted damage. Differences were largest for fragilities that used velocity and lower for fragilities that only used maximum inundation depths. Based on these results, inundated areas and water levels from building-resolving simulations might be assigned relatively higher confidence, and all the predicted velocities should be considered to have a greater error and potentially should be considered only when using ensembles.
出版年：	2022
期刊名称：	Journal of Waterway, Port, Coastal and Ocean Engineering
卷：	148
期：	1
页码：	04021044.1-04021044.14