Professor Emeritus, Tohoku University.
Proc Jpn Acad Ser B Phys Biol Sci. 2019;95(4):151-164. doi: 10.2183/pjab.95.012.
The effect of giant tsunamis such as the Indian Ocean Tsunami in 2004 and the Great East Japan Earthquake Tsunami in 2011 has been devastating. In this study, a numerical simulation of the tsunami has been developed to estimate the physical characteristics of tsunamis and their effect on human society. Several laws and equations have been introduced for the simulation of tsunami propagation in the ocean, tsunami refraction, and tsunami run-up on land under a stable computational condition with acceptable accuracy. Our proposed method has been accepted as the world standard since 1997 and has been widely distributed to many countries through UNESCO. Computer graphic animations prepared by using the results of numerical simulation have been effectively used in public education and to increase the understanding of behaviors of the tsunami on the earth. When the numerical prediction of tsunami becomes possible with sufficient accuracy, then their results can be used to predict future damages and prevent the occurrence of a disaster. Data in the past were collected and expressed in terms of a newly introduced tsunami intensity which is related to the locally observed tsunami heights.
像 2004 年印度洋海啸和 2011 年东日本大地震这样的巨型海啸的影响是毁灭性的。在这项研究中，我们开发了一个海啸数值模拟，以估计海啸的物理特性及其对人类社会的影响。在稳定的计算条件下，为了模拟海啸在海洋中的传播、海啸折射以及海啸在陆地上的上陆，引入了几个定律和方程，在可接受的精度范围内，具有合理的准确性。自 1997 年以来，我们提出的方法已被接受为世界标准，并通过联合国教科文组织广泛分发给许多国家。使用数值模拟结果制作的计算机图形动画已被有效地用于公众教育，并提高了对海啸在地球上的行为的认识。当海啸的数值预测具有足够的精度时，就可以利用这些结果来预测未来的损失，防止灾难的发生。过去的数据是通过新引入的海啸强度来收集和表示的，海啸强度与当地观测到的海啸高度有关。
