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Project:Lyons Quarry BS Date: 2/2712016 <br /> < Subject:Scour Analysis Date: <br /> Task:Armor Depth <br /> Job#: No: <br /> Analysis based on guidance in Hydraulic Design of Flood Control Channel EM1110-2-1601,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 /> 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 /> Matrix Preliminary Basis of Design South St.Wain Creek Sediment Sample R7 <br /> Max Dc(mm) 93 369 - <br /> Calculated Dc(ft) 0.31 1.21 <br /> ya(ft) 0.9 3.6 <br /> Ap 0.22 0.02 <br /> yd(ft) 3.3 177.7 <br /> yd - ya ap - 1) (11) <br /> where: <br /> ya Thickness of armoring layer <br /> y - Depth from original streambed to bottom of the armoring layer <br /> yd a Depth from original streambed to top of armoring layer or the <br /> depth of degradation <br /> op Decimal percentage of original bed material larger than the armor <br /> si ze, ac <br /> f�Ow-- /_Or.q.no, srr<amGsa <br /> .nc rer,or •U. —T.q�, yd lY <br /> �,' ? i fDwgroeed strsomcsd <br /> YO <br /> Y - Deprn ro Oorrom or me ormor.nq -over <br /> Yd Dtp rn or degroaar,on <br /> Yq - Armoring to ref <br /> D� - Oans<t<r cf armor mor<r.of <br /> dp D<c.moi O<rc<n fogs D� or.q•no� Deoa.o rer.o: <br /> forger rno-, D <br />