Question 2 (5 points)

Assuming the conduit in the figure is a trapezoidal designed excavated rock open

channel with bottom width of 6' and side slopes of 4.5' horizontal to 2' vertical, and

that the flow carried must be the same as in Question 1:

a) Determine the critical depth of the flow.

b) Determine the whether the flow in the channel is supercritical or subcritical if

the depth of flow is 4'.

c) Determine the normal depth of flow based on Manning's equation.