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首页> 外文期刊>Pure and Applied Geophysics >Field Survey of Tsunami Heights and Runups Following the 22 December 2018 Anak Krakatau Volcano Tsunami, Indonesia
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Field Survey of Tsunami Heights and Runups Following the 22 December 2018 Anak Krakatau Volcano Tsunami, Indonesia

机译:2018年12月22日anak krakatau火山海啸,印度尼西亚的海啸高度和运行田间调查

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The 22 December 2018 Anak Karakatau tsunami in Indonesia was a rare event in that few instrumental records existed of tsunamis generated by volcanic sources before this event. The tsunami, which left a death toll of 437, is of global importance as it provides opportunities to develop knowledge on generation, propagation and coastal effects of volcanic tsunamis. Here, we report results of field surveys along the coast of the Sunda Strait, Indonesia to study tsunami wave heights and coastal damage. We surveyed 29 locations and measured ranges of tsunami runup from 0.9 to 5.2 m, tsunami heights from 1.4 to 6.3 m, flow depths from 0.2 m to 3.0 m and inundation distances from 18 to 212 m. The largest tsunami heights and concentration of damage and fatalities occurred on the western shore of Java from Tanjung Lesung to Sumur. The largest cluster of fatalities occurred at Tanjung Lesung, where more than 50 people died while attending an outdoor music being held at the shoreline. The tsunami runup and tsunami height in Tanjung Lesung were 4.0 and 2.9-3.8 m, respectively. We believe this tragedy could have been avoided if the event organizers were more aware of the hazard posed by the Anak Krakatau volcano, as it had been actively erupting for several months prior to the tsunami, and simply moved the concert stage 100 m inland. Many of the locations surveyed demonstrated a similar pattern where the majority of casualties and destruction occurred within 100 m of the coast; in several locations, lives were saved where buildings were located at least this distance inland. The significant damage and numerous deaths which occurred in Sumur, despite the moderate tsunami height of 2.3-2.5 m, can be attributed to the extremely low-lying coastal land there. Flow depth in Sumur was 0.9-2.0 m. During our field surveys, nearly one year after the event, we noted that some of the damaged buildings were being rebuilt in the same locations just 10-30 m from the shoreline. We question this practice since the new buildings could be at the same tsunami risk as those damaged in the 2018 event.
机译:2018年12月22日,印度尼西亚的Anak Karakatau Tunami是一个罕见的事件,因为在此活动前由火山来源产生的海啸存在少数乐曲记录。留下死亡收费437的海啸是全球性的重要性,因为它为发展火山海啸的发电,传播和沿海效应提供了机会。在这里,我们向印度尼西亚山山海峡海岸展示现场调查的结果,以研究海啸波浪高度和沿海损害。我们调查了29个地点,并从0.9到5.2米的海啸高度从1.4到6.3米的海啸高度测量,流量深度从0.2米到3.0米,淹没距离为18至212米。来自Tanjung Lesung到Sumur的Java西岸发生了最大的海啸高度和伤害和死亡的浓度。最大的死亡群体发生在Tanjung Lesung,超过50人死于在海岸线上举行的户外音乐。 Tanjung Lesung的海啸漫步和海啸高度分别为4.0和2.9-3.8米。如果活动组织者更加了解Anak Krakatau火山危险,我们认为这悲剧可以避免,因为它在海啸前几个月积极爆发,并简单地将音乐会阶段100米内陆掀起了。调查的许多地点都表现出类似的模式,其中大多数伤亡和破坏发生在海岸100米范围内;在若干地点,挽救了建筑物至少这一距离内陆的地方。尽管温和的海啸高度为2.3-2.5米,但苏尔特发生的重大损害和许多死亡,可归因于那里极度低洼的沿海地。 SUMUR中的流动深度为0.9-2.0米。在我们的野外调查期间,近一年后,我们指出,一些受损建筑物正在与海岸线只有10-30米的同一地点重建。我们质疑这种做法,因为新的建筑物可能与2018年活动中受损的那些损坏的海啸风险相同。

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