Question $3$

Water flows in a rectangular channel with a width $B=5m,$ Manning $n=0\mathrm{.}02,S_0$

$=0\mathrm{.}002$ and the uniform depth $Y_n=8m.$ Answer the following questions:

Calculate the flowrate.

Is the flow subcritical or supercritical.

What size of hump is necessary to create critical conditions.

What depth of water exist over a narrowed section $B=4m.$

If a hydraulic jump is to be created in this channel calculate the conjugate depth

of the normal depth.