Question

Water flows with an average velocity of 1.0 m/s and a normal depth of 0.5 m in a wide rectangular channel. Is the flow subcritical or supercritical?

Answer 1

Subcritical

Step-by-step explanation:

To compute the grouse number

We use this formula

F = v/√gy

From this question

V = 1 m

G = 9.81m/sec²

Y = 0.5

When we insert this into the grouse formula

F = 1m/s / √ 9.8m/sec² x 0.5m

= 0.451< 1

Therefore we conclude that the grouse is less than 1 and so the flow is subcritical.