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state Rea. <br />• e. Hydrologic corriitions <br />~e cnu-ue number (Q]) generally used was Q~7 = 78. <br />3. De*erm;*+P the average adjusted channel slope. <br />4. For a Type II Storm, the charts on Pages 16-18 of "Peak <br />Flows in INlorado" was used to determine peak dict~harge <br />in cfs/inch of runoff; given the IN, slope, and drainage <br />area. <br />5. 'Ihe precipitation for a 10 year, 24-hots event was <br />determined to be aoPmYimately 1.60 inches (NQAP. Atlas <br />#`2) . <br />6. Otte runoff was determined by solving the following <br />equation: <br />P+0.8(S) <br />where: <br />• Q = rtmoff in inches/acre <br />P = precipitation <br />S = 1000 - 10 <br />Q7 <br />7. See Table E-1; Page E-2 for the slope adjustmmnt factors. <br />8. See Tables E-2, E-3, and E-4; Pages E-3 and E-4 for the <br />poncliixf adjustment factors. <br />9. See Figure E-1, Page E-6 for the equivalent drainage area <br />to obtain the watershed shape adjustment factors which is <br />the ratio: <br />actual drainage area <br />equivalent drainage area <br />10. Determine the peak ~ e for a l0-year, 24-hour <br />precipitation event by the following: <br />• Peak Discharge = Q10 = (cfs/inch of runoff) x (inches of <br />12-34 Revised 8/27/86 <br />