= Wave base
{wiki=Wave_base}
Wave base refers to the depth in the water column at which the energy of surface waves is negligible. Below this depth, the oscillations caused by the waves diminish significantly, effectively marking the point where wave-induced movement has little to no impact on the sediments or organisms living at that depth. Typically, wave base is located at about half the wavelength of the waves. For example, if the wavelength of a wave is 20 meters, the wave base would be approximately 10 meters deep.
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