Long-Wave Generation due to Atmospheric-Pressure Variation and Harbor Oscillation in Harbors of Various Shapes and Countermeasures against Meteotsunamis
Long-Wave Generation due to Atmospheric-Pressure Variation and Harbor Oscillation in Harbors of Various Shapes and Countermeasures against Meteotsunamis
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DOI：
10.5772/intechopen.85483
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发表时间：
2019-05
期刊：
影响因子：
--
通讯作者：
T. Kakinuma
中科院分区：
文献类型：
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作者：
T. Kakinuma
首先，利用基于非线性浅水方程组的数值模式，模拟了气压变化引起的长海浪的产生和传播过程，其中气压波在东海上空向东传播时具有不同的气压廓线模式。在日本浦内湾振荡衰减之前，由于九州主岛和冲绳海槽之间产生的振荡系统，长波的入射可以继续。第二，提出了简单的估计方程，以预测由大气压力波引起的长波的波高和波长，使用大气压力数据的海洋。第三，对C型、I型、L型、T型等形状的港湾以及T型港湾那样的双湾头浦内湾的振荡进行了数值模拟。最后，我们讨论灾害的措施，包括实时预测的meteotsunami生成，以及结构和非结构的准备。
First, the generation and propagation of long ocean waves due to the atmospheric-pressure variation have been simulated using the numerical model based on the nonlinear shallow water equations, where the atmospheric-pressure waves of various pressure-profile patterns travel eastward over East China Sea. Before the oscillation attenuation in Urauchi Bay, Japan, the incidence of long waves can continue owing to an oscillation system generated between the main island of Kyushu and Okinawa Trough. Second, the simple estimate equations are proposed to predict both the wave height and wavelength of long waves caused by an atmospheric-pressure wave, using atmospheric-pressure data above the ocean. Third, numerical simulation has been generated for the oscillation in the harbors of C-, I-, L-, and T-type shapes, as well as Urauchi Bay with two bay heads like a T-type harbor. Finally, we discuss disaster measures, including the real-time prediction of meteotsunami generation, as well as both the structural and the nonstructural preparations.