The observed rainfall intensity $($iT $),$ infiltration rate $($f $),$ and streamflow $($Q$)$ for a

rainfall$-$runoff event are summarized below. The stream has a constant base flow of $75$

cfs

$($a$)$ What is the size of the watershed $($in acres$)?$

$($b$)$ Calculate $($in tabular form$)$ and plot the unit hydrograph for this watershed. What

is its duration?

$($c$)$ Using the unit hydrograph from part $($b$),$ determine the storm hydrograph for the

following rainfall event. Show the storm hydrograph in both tabular and graphical

form.