Open AccessDasar Laut Sinusoidal Sebagai Reflektor Gelombang
Author(s) -
Viska Noviantri
Publication year - 2011
Publication title -
comtech/comtech
Language(s) - English
Resource type - Journals
eISSN - 2476-907X
pISSN - 2087-1244
DOI - 10.21512/comtech.v2i1.2781
Subject(s) - shoal , amplitude , wavelength , physics , resonance (particle physics) , acoustics , sine wave , disturbance (geology) , optics , geology , geomorphology , atomic physics , quantum mechanics , voltage
This article discusses about the influence of sinusoidal sandbars towards the amplitude of incident wave. sinusoidal sandbars may lead to Bragg resonance. Basically, when a wave meets a different depth, it will scatter into a transmitted wave and a reflected wave. Bragg resonance happens when the wavelength of incident wave is twice of the wavelength of the periodic bottom disturbance. We apply the multi-scale asymptotic expansion to obtain the results. Eventually we find that a larger amplitude disturbance leads to larger reflected wave amplitude. This result explains that the sinusoidal sandbars indeed can reduce the amplitude of incident wave and protect a beach from large amplitude incident waves.