Tsunami hazard assessment for the central and southern pacific coast of Colombia
Tsunami hazard assessment for the central and southern pacific coast of Colombia
复制标题
哥伦比亚中部和南部太平洋沿岸海啸灾害评估
DOI：
10.1080/21664250.2020.1818362
复制
发表时间：
2020
影响因子：
2.4
通讯作者：
Quintero Paola
中科院分区：
文献类型：
--
作者：
Escobar Ronald Sanchez;Diaz Luis Otero;Guerrero Anlly Melissa;Galindo Milton Puentes;Mas Erick;Koshimura Shunichi;Adriano Bruno;Urra Luisa;Quintero Paola
1906 年和 1979 年，哥伦比亚太平洋海岸附近发生了极具破坏性的海啸。最近的研究发现，该地区俯冲带内存在凹凸不平的现象，这可能会引发特大逆冲地震，引发极具破坏性的海啸。在这项研究中，我们通过计算主要情景的淹没深度和最大海啸高度来评估哥伦比亚太平洋沿岸主要人口稠密地区的海啸灾害。应用确定性方法，使用滑移赤字模型和宽带滑移模型作为海啸源。结果表明，在最坏的情况下，Esmaraldas 段海底的最大变形为 6.0 m；海啸最大高度分别为4.66 m、4.34 m和0.53 m左右。分别是图马科岛、莫罗岛和卡斯卡哈尔岛（布埃纳文图拉湾）。据计算，图马科岛和莫罗岛面积分别超过 11% 和 10%，淹没深度为 2 至 5 米。根据这些结果，制定了海啸灾害地图，并将用于制定这些地区的海啸缓解计划。
Highly destructive tsunamis occurred near the Pacific coast of Colombia in 1906 and 1979. Recent studies have established asperities within the subduction zone in this area, which can cause megathrust earthquakes triggering highly destructive tsunamis. In this study we assess the tsunami hazard in the main populated areas of Colombia Pacific coast by calculating the inundation depth and the maximum tsunami height from major scenario. A deterministic method is applied using slip deficit models and broadband slip models as tsunami sources. Result suggest that, for the worse-case scenario, the maximum deformation of the seafloor is 6.0 m within the Esmaraldas segment ; the maximum height of the tsunami is 4.66 m, 4.34 m and 0.53 m around. Tumaco Island, Morro Island, and Cascajal Island (Buenaventura Bay), respectively. Two to five meters inundation depth were calculated in over 11% and 10% of the total areas of the islands of Tumaco and Morro, respectively. Based on these result, tsunami hazard maps were alaborated and will serve to create tsunami mitigation plans in these areas.