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Location: DITCH C5 <br />Checked: Date: <br />Present <br />1. Data: <br />Drainage area: .................... <br />A = 48.0240 Acres <br />Runoff Curve Number: ............. <br />CN = 84 <br />Time of Concentration: ........... <br />Tc = 0.42 <br />Storm Type: ....................... <br />=11 <br />Pond and swamp areas spread <br />throughout watershed ............... <br />= 0.00 percent of A <br />0.0000 Acres <br />2. Frequency ........................yr <br />= 10 <br />3. Rainfall ,P(24 - hour) .............. <br />in = 2.00 <br />4. Initial abstraction, la............ <br />= 0.3810 <br />5. Compute la /P ....................... <br />= 0.1905 <br />6. Unit peak discharge, qu <br />...... csm/in = 541.41 <br />7. Runoff, Q .........................in <br />= 0.7439 <br />8. Pond & swap adjustment <br />factor .... Fp = 1.00 <br />9. Peak Discharge,gp ...............cfs <br />= 30.2212 <br />DITCH C5 <br />Channel Type: Trapezoidal, Equal Side Slopes <br />1. Channel Geometric Properties <br />Dimensions : Left Side Slope .... ............................... = 1.00:1 <br />Right Side Slope ... ............................... = 1.00:1 <br />Base Dimension ..... ..............................: 5.00 <br />2. Design Parameters <br />Mannings coefficient, n ............ ..............................: 0.020 <br />Bed Slope,s (%) ................... ..............................: 1.000 <br />Revised August 2009(PB06) Attachment 2.05.3(3) -1 -15 <br />