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` Project:Lyons Quaff BS Date: 2/27/2016 <br /> 1MYZ Subject:Scour Analysis Date: <br /> Task:Stable Particle <br /> Job#: No: <br /> Analysis based on guidance in Hydraulic Design of Flood Control Channel EMI110-2-1601,by the U.S.Army Corps of Engineers,1994 and <br /> Computing Degradation and Local Scour,by the U.S.Bureau of Reclamation,1984 <br /> Analysis based on hydraulics as Section BB-340 in HEC-RAS <br /> Meyer-Peter,Muller <br /> Flow Event 5-Year 100-Year <br /> K 0.19 0.19 <br /> d(ft) 3.44 8.52 <br /> S(ft/ft) 0.014 0.014 <br /> n. 0.044 0.044 <br /> D.(mm) 124 124 <br /> Dc(mm) 92 227 <br /> Competent Bottom Velocity <br /> Vm NO 5.86 12.61 <br /> Dc(mm) 65 299 <br /> Lane's Tractive Force <br /> Yw(lb/ft') 62.4 62.4 <br /> d(ft) 3.44 8.52 <br /> S(ft/ft) 0.014 0.014 <br /> Tc(lb/ftz) 3.01 7.44 <br /> Mobile Grain Size(mm) N/A N/A <br /> "Note mobile grain size taken from Figure 4 in next worksheet <br /> Shields Diagram <br /> Tc(lb/ftz) 3.01 7.44 <br /> Yw(lb/ft') 62.4 62.4 <br /> YS(lb/ft') 165 165 <br /> d(ft) 3.44 8.52 <br /> S(ft/ft) 0.014 0.014 <br /> Dc(ft) 0.49 1.21 <br /> Dc(mm) 149 369 <br /> Yang Incipient Motion <br /> 1 V�(ft/s) 5.86 12.61 <br /> Dc(ft) 0.226 1.048 <br /> Dc(mm) 69 319 <br /> Flow Event <br /> Calculation Method 5-Year 100-Year <br /> Meyer-Peter,Muller Dc(mm) 92 227 <br /> Competent Bottom Velocity Dc(mm) 65 299 <br /> Lane's Tractive Force Dc(mm) N/A N/A <br /> Shields Diagram Dc(mm) 149 369 <br /> Yang Dc(mm) 69 319 <br /> Average Dc(mm) 93 303 <br />