Near-field tsunami inundation forecast using the parallel TUNAMI-N2 model: Application to the 2011 Tohoku-Oki earthquake combined with source inversions
Near-field tsunami inundation forecast using the parallel TUNAMI-N2 model: Application to the 2011 Tohoku-Oki earthquake combined with source inversions
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DOI：
10.1002/2014gl062577
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发表时间：
2015-02-28
影响因子：
5.2
通讯作者：
Sugawara, Daisuke
中科院分区：
文献类型：
--
作者：
Oishi, Yusuke;Imamura, Fumihiko;Sugawara, Daisuke
为了有助于海啸预警系统，我们调查了目前可实现的速度，海啸洪水模拟的并行计算机以及高分辨率和速度比实时洪水预测的好处。我们发现，一个5米分辨率的洪水模拟可以比真实的时间快75倍，只需要1.5分钟，以概述仙台市的2011年东北海啸的洪水情况。我们开发了一种新的并行海啸模型的基础上著名的TUNNAII-N2模型，并实现了9.17万亿次浮点运算每秒（FLOPS）的9469 CPU内核。本模型可以准确地后报所观察到的2011年东北海啸的海啸源估计的tFISH和tFISH/RAPiD算法，这可以立即从实时观测数据。目前的高分辨率预测可以提供即将发生的危险/灾害的清晰图像，并可以为适当的疏散行动提供指导。
To contribute to tsunami early warning systems, we investigated the currently achievable speed of tsunami inundation simulations on a parallel computer as well as the benefits of high-resolution and faster than real-time inundation predictions. We found that a 5 m resolution inundation simulation can be 75 times faster than real time, requiring only 1.5 min to overview the inundation situation in Sendai City for the 2011 Tohoku tsunami. We developed a novel parallel tsunami model based on the well-known TUNAMI-N2 model and achieved 9.17 tera Floating-point Operations Per Second (FLOPS) on 9469 CPU cores. The present model can accurately hindcast the observed inundated regions of the 2011 Tohoku tsunami using tsunami source estimations of the tFISH and tFISH/RAPiD algorithms, which can be instantly derived from real-time observation data. The present high-resolution predictions can provide clear images of imminent hazards/disasters and can provide guidance for appropriate evacuation actions.