Q$2)$ If $y_0=2m$ in upstream section, answer the following questions.

a$)$ What is the specific energy at the cross$-$section $B=8m?$ Determine the regime of

flow?

b$)$ Is the flow can pass through the $B=6m$ section without swelling?

c$)$ If the narrow section width is reduced to $B=4m,$ can the flow can pass without

swelling? Demonstrate hydraulically.

Rectangular Channel