PROBLEM $2-(10$ points maximum$).$ The enelosed figure shows an urton drainaye area dhat has besen Sharacteristies of eath subareas shewn. The rowelf divided into three subareas for future development with the characteristies of each suboreas beyond inlet $3$ wo from each subarea to each inlet drains into a storm collector that begins at Inlet I and runs boyowd wavel time detention pond. The storm collector is mace 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 $107$ one $10$ in South 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 $Co$ are respectively the time of concentration for the overland flow in each subarea. Be aware that the responsible agency requires a minimum time of concentration of $15$ minutes to obtain the rainfall intensity.

Problem $2($continued$)$

b$)(4$ points maximum$).$ Using the Rational Method estimate the peak flow that is produced aher wll the three discharges from the inlets travel and combine to a location in the storm collector immediately afhe: intet $3,$ in cfs$.$ You are advised to use a weighted runeff eoefficient to account for the effect of the different land covers on the runoff from the subareas.