Risonanza e maree en
From "Physics, Waves, Music": a website about the physics of waves and sound, acoustics of musical instruments, musical scales, harmony and music.
| AI-translated from Italian. Original page: Risonanza_e_maree |
In a bay of particular dimensions, the natural period of oscillation of the water (for a bay closed at one end, the time a wave takes to travel four times the length of the bay) can coincide with the time interval between one high tide and the next. If this happens, the effect of the tide and that of the wave add up constructively. A particularly large tidal range is then observed in the bay.
The time between two successive high tides is 12 hours and 24 minutes, while the speed of tidal waves, which are long waves in shallow water, depends on the depth of the water (see the bottom of the page for further reading).
Examples: in Canada the Bay of Fundy and Ungava Bay, although they have different shapes, have lengths of about 270 and 320 km, and tidal ranges of up to about 17 m.
