Model for the Leading Waves of Tsunamis.
Model for the Leading Waves of Tsunamis.
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DOI：
10.1103/physrevlett.77.2141
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发表时间：
1996-09
影响因子：
8.6
通讯作者：
Srinivas Tadepalli;C. Synolakis
中科院分区：
文献类型：
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作者：
Srinivas Tadepalli;C. Synolakis
我们提出了一个海啸前浪的模型来解释为什么海啸的沿海表现被认为是孤立波，但它通常伴随着海岸线，海岸线在向海滩推进之前先退去，这表明了一个前洼地n波。在远场，我们使用Korteweg-de Vries方程，并发现地球物理尺度的n波在跨洋传播距离上不裂变。在近岸，我们用浅水理论计算了新兴的非破碎波的演变和上升，并观察到它们的演变符合格林定律。我们讨论了某些地面变形参数的影响，并通过模拟1992年9月1日尼加拉瓜海啸提供了一个应用。
We propose a model for the leading wave of tsunamis to explain why although the coastal manifestation of a tsunami is assumed solitary-wave-like it is most often accompanied by a shoreline which recedes first before advancing up the beach, suggesting a leading-depression N-wave. Far field, we use the Korteweg–de Vries equation, and find that N-waves of geophysical scale do not fission over transoceanic propagation distances. Near shore, we use shallow-water theory to calculate the evolution and runup of emerging non-breaking waves, and observe that they evolve according to Green's law. We discuss the effects of certain ground deformation parameters and provide one application by modeling the Nicaraguan tsunami of 1 September 1992.