Open Channel Flow:

$($Previous answer was incorrect$).$

Water flowing in an open channel of a rectangular cross$-$section with width $($b$)$ transitions from a mild slope to a steep slope $($i$.$e$.,$ from subcritical to supercritical flow$)$ with normal water depths of $(y1)$ and $(y2),$ respectively. Given the values of $y1[m],y2[m],$ and $b[m],$ calculate the discharge in the channel $(Q)$ in $[$Lit$/$s$].$

Givens:

$y1=6\mathrm{.}71m$

$y2=0\mathrm{.}437m$

$b=1\mathrm{.}089m$