The Runup of a Tsunami (Seismic Sea Wave) on to a Shoreline

这项研究计划的目的是 了解海啸的发生， 海岸线 当海啸（一个长波长的 地震产生的海浪） 遇到海岸线，严重的破坏可能 结果由于洪水，浮选， 巨大的物体，以及海浪的冲击 或漂浮物体， 设施 在评估中重要的参数 对海岸线的潜在破坏是 波浪上升 很少有有用的科学或 工程信息存在于试车过程中 海啸。 本研究的目的是 来研究这个复杂的 现象，从研究 椭圆余弦波的上升， 海啸的典型模型。 这项调查涉及分析 模型与实验相结合 在一个新的100英尺长的波浪水槽里。 通过 比较这两个实验的结果 方法与结果从数值 模拟的Boussinesq方程， 试图确定相对于 色散、非线性和 可能消散，导致更简洁 不同的有效性信息 模型 随后是初步的 实验室调查，以确定 与椭圆余弦波运动有关的力 简单的结构，如气缸和 靠近海岸线的平面 这些基本原理的潜在应用 对海啸工程的研究在 数值模型的校准， 经常用于评估洪水 容易遭受海啸破坏的海岸线地区，以及 在海啸预警工作中， 系统.

The aim of this research program is to understand the runup of a tsunami on to a shoreline. When a tsunami (a long wavelength sea wave generated by an earthquake) encounters a coastline, severe damage may result due to flooding, to the flotation of large objects, and to the impact of the wave or floating objects with constructed facilities. The parameter that is important in evaluating the potential damage to a coastline is the wave runup. Very little useful scientific or engineering information exists on the runup of tsunamis. The objective of this study is to investigate some aspects of this complex phenomenon, beginning with the study of the runup of a cnoidal wave, which is one quintessential model for tsunamis. This investigation involves analytical modeling combined with laboratory experiments in a new 100 foot long wave tank. By comparing the results from these two approaches with results from numerical simulations of the Boussinesq equations, an attempt is made to determine the relative effects of dispersion, nonlinearity, and possibly dissipation, leading to more concise information on the validity of different models. This is followed by a preliminary laboratory investigation to determine the forces associated with cnoidal wave motion on simple structures, such as cylinders and plane surfaces, close to the shoreline. Potential applications of these fundamental studies to tsunami engineering are in the calibration of numerical models which are frequently used in evaluating the flooding of coastline areas prone to tsunami damage, and in the operation of tsunami early-warning systems.