Hydraulic jump over a weir

Hydraulic jump is the jump of water that takes place when a supercritical flow changes into a subcritical flow. * Froude number F = where v = velocity of flow y = depth of flow g = gravitational attraction * If incoming Froude No. F1 is F1 = 1, no hydraulic jump F1 = 1 to 1.7, undulates jump is observed F1 = 2.5 to 4.5, oscillating jump is observed F1 = 4.5 to 9.0, steady jump is observed F1 ≥ 9.0, strong jump. * The loss of head in hydraulic jump is given by HL = where y1 = depth of water on upstream y2 = depth of water on upstream