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<br />w/ Freeboard: <br />MATERIAL: COBBLES AND SHINGLES <br />Triangular Earthen Channel <br />Limiting Variable: Velocity = 5.500 fps <br />Sediment-laden Water <br />Design Bottom Manning's <br />Discharge Width ZLeft ZRight Slope n <br />(cfs) (ft) (~) <br />------- --------------------------------------- <br />6.98 2.5:1 20.0:1 5.0 0.035 <br />Top Hydraulic Froude <br />Depth Velocity Width Radius Number <br />(ft) (fps) (ft) <br />0.43 3.39 9.6 0.213 1.29 <br />0.73 16.4 <br />Runoff Peak <br />Volume Discharge <br />(ac-ft) <br />----------------- <br />----------- (cfs) <br />------------ <br />------ <br />------ <br />IN/OUT 0.66 ------ <br />6.98 <br />******************************************************************************* <br />J1, B3, S2 <br />D24: 100 YR <br />Drainage Area from J1, B3, 52, SWS(s)1-8: 21.2 acres <br />• Total Contributing Drainage Area: 23.4 acres <br />MATERIAL: Rock Riprap <br />Trapezoidal Riprap Channel <br />Steep Slope Design - Simons/OSM Method <br />Design Bottom Manning's <br />Discharge Width ZLeft ZRight Slope n <br />(cfs) (ft) (~) <br />72.28 8.0 3.0:1 3.0:1 21.6 0.041 <br />Top Hydraulic Froude <br />Depth Velocity Width Radius Number <br />(ft) (fps) (ft) <br />0.44 17.73** 10.6 0.378 5.05 <br />w/ Freeboard: 0.74 12.4 <br />** Non-uniform flow - Velocity shown is V=Q/A and may not be applicable <br />----DMax---- ---- <br />(ft) (in) (ft) <br />-------------------- <br />-------------------- <br />1.88 22.50 1.50 <br />Runoff <br />volume <br />(ac-ft) <br />D50---- ----D10---- <br />(in) (ft) (in) <br />---------------------- <br />---------------------- <br />18.00 0.50 6.00 <br />Peak <br />Discharge <br />(cfs) <br />