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Project <br />~~Locacion <br />Norksheet •~: Graphical Peak Discharge method <br />SDHk4 AREA "C" By~+ Dace 7/1/93 <br />Circle one: Present Developed <br />1. Data: <br />Yr <br />Drainage area .......... Am ' 0.000''1, mil (acres/640) <br />Runoff curve number .... CN '• 94 (From worksheet 2) <br />Time of concentration .. Tc 0.02 hr (From worksheet 3) <br />Rainfall distribution type ' II (I, IA, II, III) <br />Pond and swamp areas spread <br />throughout watershed ...... ~ 0 percent of Am (_ acres or mil covered) <br />2. Frequency ............................... <br />3. Rainfall, P (24-hour) ................... <br />•. Initial abstraction, Ia ................. <br />(Use C:7 with table 4-1. ) <br />5. Compute Ia/P ............................ <br />6. Unit peak discharge, qu ................. <br />(Use Tc and Ia/P with exhibit 4-_) <br />7. Runoff, Q ............................... <br />(From worksheet 2). <br />8. Pond and swamp adjustment factor, Fp .... <br />(Use percent pond and swamp area <br />with table 4-2. Factor is 1.0 for <br />zero percent pond and swamp area.) <br />9. Peak discharge, qp ...................... <br />(Where qp ' quAmQFp) <br />- • <br />42-9 <br />in <br />Storm 1 Storm 2 Storm 3 <br />1DYR 25YR <br /> <br />in 0.13 0.13 <br />Checked Date <br />0.09_3 _ 0.072 <br />csm/in 1000 1000 <br />in 0.84 1.21 <br />1.0 1.0 <br />cfs 0.17 0.9~- <br />D~ (210•VI•TR-55, Second Ed., June 1986) <br />