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In biology, any group of fish that stay together for social reasons are shoaling, and if the group is swimming in the same direction in a coordinated manner, they are schooling. [1] In common usage, the terms are sometimes used rather loosely. [1] About one quarter of fish species shoal all their lives, and about one half shoal for part of ...
Shoaling can also refract waves, so the waves change direction. For example, if waves pass over a sloping bank which is shallower at one end than the other, then the shoaling effect will result in the waves slowing more at the shallow end. Thus, the wave fronts will refract, changing direction like light passing through a prism.
Some of the important wave processes are refraction, diffraction, reflection, wave breaking, wave–current interaction, friction, wave growth due to the wind, and wave shoaling. In the absence of the other effects, wave shoaling is the change of wave height that occurs solely due to changes in mean water depth – without alterations in wave ...
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Shoaling mackerel scad avoiding a shark, north of Oahu, Hawaii.. The mackerel scad's range covers most of the world's oceans. In the western Atlantic, they have been found off Nova Scotia and Bermuda, south to Rio de Janeiro, [9] although they do not seem common in the Gulf of Mexico. [10]
Propagation of shoaling long waves, showing the variation of wavelength and wave height with decreasing water depth.. In fluid dynamics, Green's law, named for 19th-century British mathematician George Green, is a conservation law describing the evolution of non-breaking, surface gravity waves propagating in shallow water of gradually varying depth and width.
Shoal, shoals or shoaling may also refer to: Locations. The Shoals, a region in northwest Alabama, United States; Shoals, Indiana, a town in the United States;
Waves from one current are driven into an opposing current. This results in shortening of wavelength, causing shoaling (i.e., increase in wave height), and oncoming wave trains to compress together into a rogue wave. [58] This happens off the South African coast, where the Agulhas Current is countered by westerlies. [59]