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• <br /> <br />SEDCAD+ RIFRAP CHANNEL DESIGN <br />----------------------------- <br />LOWER DITCH FD-5 <br />INPUT VALUES: <br />Shape TRIANGULAR <br />Discharge 4.00 cfs <br />Slope 10.00 % <br />Sideslopes IL and R) 3.00:1 <br />Freeboard 1 ft <br />RESULTS: <br />Steep Slope Design - PADER Method <br />3.OO:l <br />Depth 0.54 ft <br />with Freeboard 1.54 ft <br />Top Width 3.25 ft <br />with Freeboard 9.25 ft <br />Velocity 4.54 fps <br />Cross Sectional Area 0.88 sq ft <br />Hydraulic Radius 0.26 ft <br />Manning's n 0.042 <br />Fr~ude Number 1.54 <br />Dmax 0.313 ft ( 3.75 in) <br />D50 0.250 ft ( 3.00 inl <br />D10 0.083 ft ( 1.00 inl <br /> <br />