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rr 6 C� <br /> ( �b• <br /> Worksheet 6a: Detention basin storage, <br /> peak outflow discharge (qo) known <br /> Project T� j f jl 1; 1,�l .�, By _LL� Date <br /> Location Checked Date <br /> circle one: �rvesent Developed <br /> 0 <br /> a <br /> o <br /> ., <br /> Detention basin storage <br /> ..t } Va 7 <br /> 1. Data: 6. <br /> Drainage area ....... Am ' '��mi2 yr qo <br /> Rainfall distribution (Ilse Q with figure 6-1) <br /> type (Z, IA, II, III) � i <br /> i. Runoff, Q in <br /> 1st 2nd (From worksheet 2) <br /> ata a stage <br /> B. Runoff volume, <br /> Vr ac-ft <br /> 2. Frequency ...... yr (Vr Q :53.33) <br /> 3. Peak inflow dia- 9. Storage volume, <br /> �� V ac-f t <br /> charge, qi .... cfa LW.IL 1 a .......... <br /> (From worksheet 4 or 5b) V <br /> r <br /> 1/ (Vs - V (na)) <br /> 4. Peak outflow dis- r <br /> charge, qo .... cfa <br /> 10. maximum stage, rmax <br /> (From plot) <br /> qo <br /> S. Compute q <br /> i <br /> 1/ 2nd stage qo includes 1st stage qo. <br /> (210-VI-TR-55, Second Ed., June 1986) D-' <br />