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Created page with '200px|thumb|left|A hydraulic jump in the river A hydraulic jump is a discrepancy in water levels. When water in a stream flows over a rock, the water m…'
[[File:Hydraulicjump.jpg|200px|thumb|left|A hydraulic jump in the river]]
A hydraulic jump is a discrepancy in water levels. When water in a stream flows over a rock, the water may reach supercritical speed - that is, the speed of the water may exceed the speed that waves propagate at. If so, there will be a sudden change in the water's height so that the speed of the water is reduced to subcritical speed.
The equation that governs this phenomena is:
<math>H_2/H_1 = 1/2(<sqrt>8(F_1)^2 + 1</sqrt> - 1)</math>
where <math>F_1 = <sqrt>gY_1</sqrt></math>
F_1 is called the Froude number, g is the acceleration due to gravity, and Y_1 is the depth of the water.
A hydraulic jump is a discrepancy in water levels. When water in a stream flows over a rock, the water may reach supercritical speed - that is, the speed of the water may exceed the speed that waves propagate at. If so, there will be a sudden change in the water's height so that the speed of the water is reduced to subcritical speed.
The equation that governs this phenomena is:
<math>H_2/H_1 = 1/2(<sqrt>8(F_1)^2 + 1</sqrt> - 1)</math>
where <math>F_1 = <sqrt>gY_1</sqrt></math>
F_1 is called the Froude number, g is the acceleration due to gravity, and Y_1 is the depth of the water.