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Superelevation,AY <br /> DY- 1-5Cl'T ($-$) TABLE 8.1 COEFFICIENTS FOR USE IN SUPER- <br /> gr, ELEVATION FORMULA <br /> FLOW T E CROSS SECTION TYPE OF CURVE VALUE OF C <br /> WherC <br /> GY - Rise in water-surface elevation (Superelevation) around the outside <br /> of a channel bend,in feet', Tr-gai3 Re<nnaaIU Simple CircaEer 0.5 <br /> C - A coefficient(see Tnbie 8.3); rrgpgvll Traperuidal sepia CYrcuEer 0.5 <br /> V Average velocity of flaw,in feet per second; <br /> T' - Channel width at elevation of water Surface,in feet; R.ri4 Re 9.1.r si pEa cir' ar Lo <br /> g - Acceleration due to gravity(-32.2 ft/sec}; rc 135 ft Rapid l'r.p—k%I Simple 0-1.r 1.0 <br /> rr - Radius of curvature of channel centerline,in feet;and, <br /> 1.5 = Factor of safety to account for alluvial channel conditions. g 32.2 ft/s/s R.pW Reeranaular E.9,—.t T--iti- o.s <br /> See U.S.Army Carps of Engineers(1970)for the source of this equation. Rana Topemidal Eayement Tr..iti- Lo <br /> /Bench 1 3.96 7.44 0.04 <br /> Chute 1 7.76 5.93 0.12 <br />