Page 362 - Civil Engineering Formulas

SI units mm 2 m 0.5 /s m 0.37 /s m m m MPa N m/s 2 m m m m N s 2 /m s/m 1/3 m N MPa m 3 /s m 3 /s m m m s s, m m/s kg

USCS units ft 2 ft 5 /s ft 0.37 /s ft ft ft lb/in 2 lb ft/s 2 ft ft ft ft lb s 2 /ft s/ft 1/3 ft lb psf ft 3 /s ft 3 /(s ft) ft ft s s, ft ft/s lb

Symbols, Terminology, Dimensions, and Units Used in Water Engineering

Dimensions L 2 L 1/2 /T L 0.37 /T L L L F/L 2 F L/T 2 L L L L FT 2 /L T/L 1/3 L F F/L 2 L 3 /T L 3 /T L L L T T, L L/T F

Terminology Chezy roughness coefficient Hazen–Williams roughness coefficient Modulus of elasticity Acceleration due to gravity Total head, head on weir Head loss due to friction Manning’s roughness coefficient Perimeter, weir height Force due to pressure

Area Depth Critical depth Diameter Force Head or height Length Mass Pressure Flow rate Unit flow rate Radius Hydraulic radius Time Time, thickness Velocity Weight

TABLE 12.1 Symbol A C C 1 d d c D E F g H h h f L M n P P p Q q r R T t V W

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