PROBLEM $2-(10$ points maximum$).$ The enclosed figure shows an urban drainaye area that has been divided into three subareas for future development with the characteristios of each subarea shorom. The rundery from each subarea to each inlet drains into a storm collector that begins at Inlet I and runs beyond inlet $3,5$ detention pond. The storm collector is made of two sections that have different lenghs but same uravel time between Inlets $1$ and $2$ and Inlets $2$ and $3.$

The design return period is $5$ years. IDFs are included in your Reference Handout and apply $207$ one $10$ in $$0n$ holh Florida as provided by the Florida Department of Transportation.

Areas A$1,$ A$2$ and A$3$ are given in acres; C$1,$ C$2$ and C$3$ are runoff coefficients and all values of $10$ are respectively the time of concentration for the overland flow in each subarea. Be aware that the responsible agency req a minimum time of concentration of $15$ minutes to obtain the rainfall intensity.

a$)$

$(4$ points$).$ Using the Rational Method determine the individual peak flow from each of the three subareas to each of the inlets, in cfs$.$

Problem $2($continued$)$ inlet $3,$ in cfs$.$ You are advised to use a weighted runof different land covers on the runoff from the subareas

c$)(2$ points$).\_$Recognizing that the Rational Method applies to drainage areas of less than $1m{i}^2($Robertson et$.$ al$,1998),$ confirm with calculations whether or not the Rational Method applies or does not apply in this specific problem.