Mannings N: table_2
Manning's n roughness coefficients for open channels and closed conduits — used in hydraulic flow calculations
| section | description | n max (dimensionless) | n min (dimensionless) | n normal (dimensionless) | subcategory |
|---|---|---|---|---|---|
| table_2 | 1. cemented rubble | 0.03 | 0.017 | 0.025 | g. Masonry |
| table_2 | 1. clean, recently completed | 0.02 | 0.016 | 0.018 | a. Earth, straight, and uniform |
| table_2 | 1. dense weeds, high as flow depth | 0.12 | 0.05 | 0.08 | e. Channels not maintained, weeds and brush uncut |
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