Water flows in a 6-m-wide rectangular channel with a depth of 0.55 m and a flow rate of 12 m3/s.

determine the critical depth of the flow.

express your answer in m.

Explanation:

General Formula for calculating the critical Depth is:

       Eq(1)

where:

V is the volume flow rate

g is gravitational acceleration i.e 9.81 m/s^2

A_c is the  critical area

In case of Rectangular channel:

where:

w is the width

In case of Rectangular channel Eq (1) will become:

Actual depth i.e Y < Critical depth i.e Y_c

Flow is Supercritical

diy

explanation: