ABCDEFGHIJKLMNOPQRSTUVWXYZAA
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MZ
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H = [1+ke+(Ku*n^2*L)/R^1.33][V^2/2*g]
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HBarrel loss (m)
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keConstant
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KuConstant (SI unit)19.63
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nManning roughness coefficient
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LLength of the culvert barrel (m)
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RHydraulic radius of the full culvert barrel (m)
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VVelocity in the barrel (m/s)
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gGravitational accelaration (SI)9.81m/s/s
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KeWingwall Angle & Edge Finish
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0.2- 0° or 90° Bevelled Edge
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- 30° to 75° Bevelled Edge
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0.5-90° Square Edge
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- 10° to 25° Square Edge
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0.7Projecting Square Edge
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Result from Design Chart
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kenLBDAPRQVH (Calculation)H (Chart 18.A10)
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0.50.012361.51.21.805.400.3334.82.670.700.75
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0.50.01225236.0010.000.6007.21.200.120.12
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0.70.012201.523.007.000.429206.674.254.5
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0.50.0122032.57.5011.000.682202.670.580.58
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0.70.01250248.0012.000.667202.500.620.65
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0.70.012100133.008.000.37551.670.390.39
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