Wavemaker Curves for Tsunamis Generated by Underwater Landslides
Wavemaker Curves for Tsunamis Generated by Underwater Landslides
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DOI：
10.1061/(asce)0733-950x(1998)124:3(127
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发表时间：
1998-05
期刊：
影响因子：
--
通讯作者：
P. Watts
中科院分区：
文献类型：
--
作者：
P. Watts
根据滑坡长度、滑坡初始淹没、从水平面测得的倾斜角、滑坡运动的特征距离和滑坡运动的特征持续时间，构建了滑坡特征水波振幅的无量纲造波曲线。当水下物体的非定常运动仅受一个特征距离尺度和一个特征时间尺度的控制时，该造波曲线广泛适用于由水下物体的非定常运动产生的水波。固体块体运动的解析解提供了特征距离尺度和时间尺度。在45°斜面上的二维实验结果证实了固体块体滑坡的造波曲线是作为无因次初始淹没和哈马克数的函数而存在的。在固体块体运动已知的情况下，可以利用造波曲线预测固体块体滑坡产生的水波振幅。给出了线性水波产生的判据。
A nondimensional wavemaker curve of a characteristic water wave amplitude is constructed from the landslide length, the initial landslide submergence, the incline angle measured from the horizontal, the characteristic distance of landslide motion, and the characteristic duration of landslide motion. This wavemaker curve applies broadly to water waves generated by unsteady motion of a submerged object, provided the motion is governed by only one characteristic distance scale and one characteristic time scale. An analytical solution of solid block motion provides the characteristic distance scale and time scale. Two-dimensional experimental results on a 45° incline confirm that a wavemaker curve for solid block landslides exists as a function of the nondimensional initial submergence and what is called the Hammack number. Water wave amplitudes generated by solid block landslides can be predicted from the wavemaker curve if the solid block motion is known. Criteria for the generation of linear water waves are given.