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FHWA Urban Drainage Design Program, HY-22 <br />HYDRAULIC PARAMETERS OF OPEN CHANNELS <br />Trapezoidal, Rectangular, or Triangular X-Section <br />Date: 06/16/2008 <br />Project No. :M2000098 <br />Project Name.:Monarch Quarry <br />Computed by :Allen Sorenson, DRMS <br />Project Description <br />Sed. pond spillway requirements, 125 ac. drainage area, <br />curve no. = 70, mannings n = 0.040, 25 yr, 24 hr event, <br />2.411. rain, 4" riprap, .01 ft/ft channel, 1' flow depth <br />INPUT PARAMETERS <br />1. <br />?2. <br />3. <br />4. <br />5. <br />6. <br />7. <br />Channel Slope (ft/ft) <br />Channel Bottom Width (ft) <br />Left Side Slope (Horizontal to 1) <br />Right Side Slope (Horizontal to 1) <br />Manning's Coefficient <br />Discharge (cfs) <br />Depth of Flow (ft) <br />OUTPUT RESULTS <br />Cross Section Area <br />Average Velocity <br />Top Width (ft) <br />Hydraulic Radius <br />Froude Number <br />(Sgft) <br />(ft/sec) <br />(f t) <br />0.0100 <br />10.17 <br />2.00 <br />2.00 <br />0.040 <br />40.00 <br />1.00 <br />12.17 <br />3.29 <br />14.17 <br />0.83 <br />0.63