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$($Manning equation$)($a$)$ Determine the maximum flowrate possible for the creek shown in the figure below if it is not to overflow onto the floodplain. The creek bed drops an average of $5\mathrm{.}32f\frac{t}{h}$alf$-$mile of length. $($b$)$ Determine the flowrate during a flood if the depth is $8ft.$

$($a$)f\frac{t^3}{s}$

$($b$)f\frac{t^3}{s}$