Question

Hydraulic jump occurs in a rectangular canal. The water depth just before and just after the jump are 0.6 m and 1.5m respectively. Calculate the critical depth and the flow rate per unit width

Answer 1

As, we know relationship between conjugate depth is given as,

Where, Y1 is depth before jump = 0.6 m.

Y2, depth after jump = 1.5 m.

q is flow rate per unit width.

And g is gravity , = 9.81 m/s^2 .

Putting all values,

On solving,

Flow rate per unit width ,q = 3.045 m^3/s/m.

The critical depth is given as ,

Critical depth, Yc = 0.981 m.

If any doubt kindly comment. Thank you.