Rework example 5.5.4 if the depth before the jump is 0.8 m and all other data remain the s...

Rework example 5.5.4 if the depth before the jump is 0.8 m and all other data remain the same.

EXAMPLE 5.5.4

A hydraulic jump occurs in a rectangular channel 3.0 m wide. The water depth before the jump is 0.6 m, and after the jump is 1.6 m. Compute (a) the flow rate in the channel, (b) the critical depth, and (c) the head loss in the jump.

SOLUTION

(a) To compute the flow rate knowing y1 = 0.6 m and y2 = 1.6 m, equation (5.5.4) can be used:

in which has been substituted:

q = 3.26 m3/s per meter width of channel

and

(b) Critical depth is computed using equation (5.2.14):

(c) The headloss in the jump is the change in specific energy before and after the jump

so

so