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Find the uniform flow discharge in a 5 ft diameter reinforced concrete pipe (RCP) on a longitudinal slope of 0.003. The flow depth at pipe is 3 ft. Use Table C-2 for roughness coefficient.

Find the uniform flow discharge in a 5 ft diameter reinforced concrete pipe (RCP) on a longitudinal slope of 0.003. The flow depth at pipe is 3 ft. Use Table C-2 for roughness coefficient.

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Find the uniform flow discharge in a 5 ft diameter reinforced concrete pipe (RCP) on a longitudinal slope of 0.003. The flow depth at pipe is 3 ft. Use Table C-2 for roughness coefficient. 


Table C-2. Average Manning Roughness Coefficients for Closed Conduits (") Manning Roughness Coefficient (n) Conduit Reinforced Concrete Pipe (RCP) 0.013 Corrugated Metal Pipe and Pipe Arch 2-3/8 x 2 inch Corrugations Unlined Half Lined Full Flow 0.024 0.018 0.016 d/D>=0.60 d/D<o.60 Fully Lined 3x1 inch Corrugations 6x2 inch Corrugations Spiral Rib Pipe Helically Wound Pipe 0.013 0.013 0.027 0.032 0.013 18-inch 0.015 24-inch 30-inch 36-inch 42-inch 48-inch 0.017 0.019 0.021 0.022 0.023 Plastic Pipe (HPDE and PVC) Smooth 0.013 0.024 Corrugated Vitrified Clay Pipe 0.014 Cast-Iron Pipe (Uncoated) 0.013 Steel Pipe 0.011 Brick 0.017 |Cast-In-Place Concrete Pipe Rough Wood Forms Smooth Wood or Steel Forms 0.017 0.014 () Based on materials and workmanship required by standard specifications.
Transcribed Image Text:Table C-2. Average Manning Roughness Coefficients for Closed Conduits (") Manning Roughness Coefficient (n) Conduit Reinforced Concrete Pipe (RCP) 0.013 Corrugated Metal Pipe and Pipe Arch 2-3/8 x 2 inch Corrugations Unlined Half Lined Full Flow 0.024 0.018 0.016 d/D>=0.60 d/D<o.60 Fully Lined 3x1 inch Corrugations 6x2 inch Corrugations Spiral Rib Pipe Helically Wound Pipe 0.013 0.013 0.027 0.032 0.013 18-inch 0.015 24-inch 30-inch 36-inch 42-inch 48-inch 0.017 0.019 0.021 0.022 0.023 Plastic Pipe (HPDE and PVC) Smooth 0.013 0.024 Corrugated Vitrified Clay Pipe 0.014 Cast-Iron Pipe (Uncoated) 0.013 Steel Pipe 0.011 Brick 0.017 |Cast-In-Place Concrete Pipe Rough Wood Forms Smooth Wood or Steel Forms 0.017 0.014 () Based on materials and workmanship required by standard specifications.
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