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Drainage area: .................... A = 41.7000 Acres <br />Runoff Curve Number: ............. CN = 78 <br />Time of Concentration: ........... Tc = 0.50 <br />Storm Type: ....................... = II <br />Pond and swamp areas spread <br />throughout watershed ............... = 3.00 percent of A <br />1.2510 Acres <br />2. Frequency ........................yr = 10 <br />3. Rainfall ,P(24 - hour) .............. in = 2.00 <br />4. Initial abstraction, la............ = 0.5641 <br />5. Compute la /P ....................... = 0.2821 <br />6. Unit peak discharge, qu ...... csm /in = 452.95 <br />7. Runoff ,Q .........................in = 0.4844 <br />8. Pond & swap adjustment factor .... Fp = 0.75 <br />9. Peak Discharge,gp ...............cfs = 10.7219 <br />DITCH D108 <br />Channel Type: Trapezoidal, Equal Side Slopes <br />Dimensions: Left Side Slope 2.00:1 <br />Right Side Slope 2.00:1 <br />Base Dimension: 2.00 <br />Wetted Perimeter: 5.03 <br />Area of Wetted Cross Section: 2.27 <br />Discharge: 10.70 cfs <br />Depth of Flow: 0.68 feet <br />Velocity: 4.70 fps <br />Channel Lining: EARTH WITH SOME GRASS <br />Revised June 2011 (TR -60) Attachment 2.05.3(3) -1 -50 <br />