Keywords
resonant mode
tide level
harbour layout
Crescent City harbour
How to Cite
Abstract
The powerful tsunami events caused by Feb. 27th, 2010 Chilean earthquake and Mar. 11th, 2011 Tohoku earthquake lead to the revelation of influence of tide level change in harbour oscillation. During a long time span of harbour excitement, the ocean surface will shift up and down, which, through dispersion relationship, makes the primary resonant mode to appear in various resonant spikes in the spectral density distribution. For the time domain analysis, the present paper uses the numerical model of the improved formula of Peregrine's Boussinesq-type equations to study the oscillation properties of three harbours in California with five representative tide levels. By white-noise analysis, the result of present paper in time domain is cross checked with earlier studies in frequency domain, and the effect of fluctuating tide level and the corresponding change of harbour layout is ascertained.References
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