Q$5($a$)$ Explain Froude number and the definition of subcritical, critical flow and supercritical

flow.

$(6$ marks$)$

$($b$)$ Water discharging into a $8$ m wide rectangular horizontal channel from a sluice gate

is observed to experience a hydraulic jump as in Figure Q$5($b$).$ The flow depth and

velocity before the jump are $0\mathrm{.}8$ m and $7\frac{m}{s},$ respectively. Determine

$($i$)$ the flow depth and the Froude number after the jump

$($ii$)$ the head loss and the dissipation ratio

$(6$ marks$)$

$(4$ marks$)$

$($iii$)$ the wasted power production potential due to the hydraulic jump

$(4$ marks$)$