陸棚斜面に入射した津波の多重反射 [in Japanese] MULTIPLE REFLECTION OF TSUNAMIS INCIDENT ON A CONTINENTAL SLOPE [in Japanese]
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岸沖方向に有限な陸棚斜面を想定し, 沖合からの任意の入射波形に対する斜面上の津波伝播を表す理論解を求めた. さまざまな入射条件において得られた理論解を整理し, 特に斜面上における津波の多重反射現象に着目し, 津波の捕捉・増幅・減衰特性に関する新たな知見を得た.
The author derives an analytical solution of tsunamis which are obliquely incident on a offward-finite constant slope. The incident waveforms are assumed to be transient. Based on the solutions obtained, characteristics of transient tsunami propagations on the slope are discussed in terms of the several conditions of incidence such as horizontal incident wave scale, incident angle and incident waveform. When tsunamis are incident almost parallel to the shoreline, multiple reflected waves reveal and are trapped on the slope. The solution indicates that the interference between multiple reflected waves and incoming incident waves could be a contributing cause of conspicuous amplification of tsunamis on the slope.
- Doboku Gakkai Ronbunshu
Doboku Gakkai Ronbunshu 705, 151-160, 2002-05-21
Japan Society of Civil Engineers