How To Calculate Slope In Manning Equation Complete Guide

how to calculate slope in manning equation. And flow depth y 3 ft. Q VA 271 ftsec 8 ft2 217 ft 3sec.

Streamflow Routing Section Four Stream Properties Manning S Equation from stream1.cmatc.cn

N Mannings Roughness Coefficient R Hydraulic Radius S Line Slope V Flow Velocity. R h is the hydraulic radius L. Any of the other parameters in the Manning Equation could be calculated if it is the only unknown.

Step 1 Determine input parameters including longitudinal slope S cross slope Sx gutter flow Q and Mannings n.

Bottom width b 5 ft. Type of Gutter or Pavement Mannings n. Q Flow Rate ft 3 s v Velocity fts A Flow Area ft 2 n Mannings Roughness Coefficient R Hydraulic Radius ft S Channel Slope ftft. Bottom width b 5 ft.

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