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APp~d.,< C <br />Worksheet 4: Graphical Pealc Discharge method <br />Project <br />~,ne <br />Location I~(ps~-r~ccr.v, e~ .~µarP <br />Circle one:-I resen Developed <br />1. Data: <br />skd-i ~s~d-z <br />Drainage area .......... Am = 0.008, a.oigz miz (acres/640) <br />Runoff curve number .... CN = '7S (From worksheet 2) <br />Time of concentration ., Tc = c.z79 a zS6 hr (From worksheet 3) <br />Rainfall distribution type = ~ (I, IA, II, III) <br />Pond and swamp areas spread <br />throughout watershed ...... _ ~ percent of Am (_ acres or mil covered) <br />Ss.h /~. ri/7 -SK~6tSM <br /> St-ex~a 1 X1/2 Storm 113 <br />2. Frequency ............................... yr /0 d /O o <br />3. Rainfall, P (2~+-hour) ................... in 2 •3 Z. 3 <br />4. Initial abstraction, I ,,,,,,,,,,,,,,,,, <br />a <br />(Use CN with table 4-1.) <br />5. Compute I /P ............................ <br />a , <br />6. Unit peak discharge, q ................. <br />u <br />(Use Tc and Ia/P with exhibit 4 ~) <br />7. Runoff, Q ............................... <br />(From worksheet 2). <br />8. Pond and swamp adjustment factor, F ,... <br />(Use p <br />percent pond and swamp area <br />with Cable 4-2. Factor is 1.0 for <br />zero percent pond and swamp area.) <br />9. Peak discharge, q ...................... <br />P <br />(Where qp = quAmQFp) <br />By ~W <br />Checked <br />Date /.D r ~~~~ <br />Date <br />in x•667 0,(067 <br />©. zq o, Zy <br />csm/in 6 ~~ ~ ¢"~ <br />in O. S~J- D, s~l- <br /> <br />D-4 (210-VI-TR-55, Second Ed., June 1980) <br />