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r <br />SEDCAD+ ERODIBLE CHANNEL DESIGN <br />------------------------------- <br />• DITCH D-21B, 10-YEAR 24-HOUR STORM EVENT <br />Limiting Velocity Technique <br />sediment-laden Water <br />INPUT VALUES: <br />Shape TRIANGULAR <br />Discharge 0.58 cfs <br />Slope 20.00 $ <br />Sideslopes 2.50:1 (L) 2.50:1 (R) <br />Manning's n 0.030 <br />Max. Velocity 5.50 fps <br />Material GRADED SILTS - COBBLES COLLOIDAL <br />Freeboard .3 ft <br />RESULTS: <br />Actual Discharge 0.58 cfs <br />Depth 0.22 ft <br />with Freeboard 0.52 ft <br />Top Width 1.10 ft <br />with Freeboard 2.60 ft <br />• Velocity 4.85 fps <br />Cross Sectional Area 0.12 sq ft <br />Hydraulic Radius 0.10 ft <br />Froude Number 2.58 <br />• D-46 Revised 05/23/94 <br />