气候变化领域集成服务门户(CCPortal): Ex post analysis of engineered tsunami mitigation measures in the town of Dichato, Chile

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DOI	10.1007/s11069-020-03992-z
	Ex post analysis of engineered tsunami mitigation measures in the town of Dichato, Chile
	Oportus M.; Cienfuegos R.; Urrutia A.; Aránguiz R.; Catalán P.A.; Hube M.A.
发表日期	2020
ISSN	0921030X
起始页码	367
结束页码	406
卷号	103 期号:1
英文摘要	Due to Chile’s notorious and frequent seismic activity, earthquake- and tsunami-related studies have become a priority in the interest of developing effective countermeasures to mitigate their impacts and to improve the country’s resilience. Mitigation measures are key to accomplish these objectives. Therefore, this investigation adopts a tsunami damage assessment framework to evaluate the direct benefits of tsunami mitigation works implemented by the Chilean government in the town of Dichato in the aftermath of the 2010 tsunami. We perform an ex post analysis of the potential damage reduction produced by these works studying what would have been the consequences on the built environment if they were in place for the tsunami that hit this area after the Maule earthquake in February 27, 2010. We use state-of-the-art tsunami simulation models at high resolution to assess the reduction in tsunami intensity measures, which serve as input to evaluate the benefit from averted damage against the costs of the mitigation measures. The obtained results show a reduction in the flooded area and a delay in the arrival times for the first smaller tsunami waves, but a negligible damage reduction when confronted to the largest waves. In conclusion, the tsunami mitigation measures would not have been effective to reduce the impact of the tsunami generated by the Maule earthquake in the town of Dichato, but could have had a benefit in retarding the inundation of low-land areas for the first smaller tsunami waves. The latter suggests that these works might be useful to mitigate storm waves or tsunamis of much smaller scales than the one that hit central-south Chile in 2010. © 2020, The Author(s).
关键词	Cost–benefit analysis Mitigation measures Tsunami
英文关键词	Chile earthquake 2010; cost analysis; earthquake damage; seismic source; seismicity; tsunami; Bio Bio; Chile; Dichato
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/205860
作者单位	Departamento de Ingeniería Hidráulica y Ambiental, Pontificia Universidad Católica de Chile, Santiago, Chile; Centro de Investigación para la Gestión Integrada del Riesgo de Desastres (CIGIDEN), ANID/Fondap/15110017, Vicuña Mackena 4860, Santiago, Chile; Departamento de Ingeniería Civil, Universidad Católica de la Santísima Concepción, Concepción, Chile; Departamento de Obras Civiles, Universidad Técnica Federico Santa María, Valparaíso, Chile; Centro Científico Tecnológico de Valparaíso-CCTVal, Universidad Técnica Federico Santa María, Valparaíso, Chile; Departamento de Ingeniería Estructural y Geotecnia, Pontificia Universidad Católica de Chile, Santiago, Chile
推荐引用方式 GB/T 7714	Oportus M.,Cienfuegos R.,Urrutia A.,et al. Ex post analysis of engineered tsunami mitigation measures in the town of Dichato, Chile[J],2020,103(1).
APA	Oportus M.,Cienfuegos R.,Urrutia A.,Aránguiz R.,Catalán P.A.,&Hube M.A..(2020).Ex post analysis of engineered tsunami mitigation measures in the town of Dichato, Chile.Natural Hazards,103(1).
MLA	Oportus M.,et al."Ex post analysis of engineered tsunami mitigation measures in the town of Dichato, Chile".Natural Hazards 103.1(2020).