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<br />HALIETT MATERIALS - WINKLER QUA <br />DRAINAGE REPORT <br />RATIONAL METHOD STORM RUNOFF <br />TIME OF CONCENTRATION <br />INITIAL (OVERLAND) TIME <br />L = 500 FT OVERLAND DISTANCE IN FEET <br />S = 3.0 ~ SLOPE IN PERCENT <br />C5 = 0.10 OPEN AREA - CLAYEY SOIL <br />Ti = 27.91 MIN 1.8*(1.1- C5)*( L )".5 / ( S )"1/3 <br /> (UDFCD CRITERIA MANUAL) <br />TRAVEL TIME <br />L = 800 FT TRAVEL DI STANCE IN FEET <br />S = 1.9 $ SLOPE IN PERCENT <br />V = 3.6 FPS ( S ) 2 CURVE FIT SCS VEL CURVE <br />• Tt = 3.69 MIN DISTANCE / VELOCITY <br />Tc = 31.60 MIN Ti + Tt <br /> C2 CS C10 C100 <br />RUNOFF UDFCD <br />COEFFICIENTS 0.05 0.10 0.20 0.40 CLAYEY SOIL <br />AREA 47.0 acr es <br />RAINFALL I2 I5 I10 I100 <br />INTENSITIES DOUGLAS COUNTY <br />(INCHES/HR) 1.65 2.22 2.58 4.04 ZONE I <br /> Q2 QS Q10 Q100 <br />PEAK RUNOFF <br />(CFS) 3.87 10.45 24.26 76.01 Q = c i A <br />ONE-HOUR V2 VS V10 V100 <br />VOLUME <br />(CUBIC FT) 7,344 19,616 46,005 144,114 V = Q*Tc (FAA) <br />(ACRE*FEET) 0.17 0.45 1.06 3.31 <br />RRY TA 88-146 <br />08/15/69 <br />SUB-BASIN L <br />