Mannings N: table_4
Manning's n roughness coefficients for open channels and closed conduits — used in hydraulic flow calculations
| section | description | n value | subcategory |
|---|---|---|---|
| table_4 | 1. Annular 2.67 x 1/2 inch (all diameters) | 0.024 | |
| table_4 | 10" diameter | 0.014 | 2. Helical 1.50 x 1/4 inch |
| table_4 | 12" diameter | 0.011 | 3. Helical 2.67 x 1/2 inch |
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