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Graphical Peak Discharge <br />Graphical Peak Discharge <br />Project: Cugnini <br />Location: Grass Channel #1 <br />8/20/2008 14:44 <br />By: Ryan Ellis Date: 08/20/08 <br />Checked: Greg Lewicki <br />1. Data: <br />Drainage area = 3699820 Sq Ft <br />Runoff Curve Number CN = 74 <br />Time of Concentration: Tc = 0.54 <br />Storm Type:= II <br />Pond and swamp areas spread <br />throughout watershed. = 3.00 percent of A 110994 Sq Ft <br />2. Frequency yr = 100 <br />3. Rainfall,P(24-hour) in = 3.20 <br />4. Initial abstraction, la = 0.7027 <br />5. Compute Ia/P = 0.2196 <br />6. Unit peak discharge, qu. csm/in = 460.24 <br />7. Runoff,Q in = 1.0375 <br />8. Pond & swap adjustment factor, Fp = 0.75 <br />9. Peak Discharge,qp cfs = 48 <br />Vegetated Channel Design <br />Project: Cugnini Gravel pit By: Ben Miller Date: 06/30/03 <br />Channel Type: Trapezoidal, Equal Side Slopes <br />1. Channel Geometric Properties <br />Dimensions : Left Side Slope ................................... = 5.00:1 <br />Right Side Slope .................................. = 5.00:1 <br />Base Dimension ...................................: 22.29 <br />2. Design Parameters <br />Mannings coefficient,n ..........................................: 0.025 <br />Bed Slope,s (%) .................................................: 2.000 <br />3. Design details <br />Discharge .......................................................: 63.00 cfs <br />Depth of Flow ...................................................: 0.51 feet <br />Cugnini Pit, November 2009 D-10