Question

Manning's roughness coefficient n is related to Darcy-Weisbach friction factor f as

• A. $n=\left[\frac{f{R}^{1/3}}{8g}\right]$
• B. $n=R^{2/3}/\sqrt{8gf}$
• C. $n={\left[8f{R}^{1/3}/g\right]}^{1/2}$
• D. $n=\sqrt{8g/f{R}^{1/6}}$

Answer 1

The correct option is A $n=\left[\frac{f{R}^{1/3}}{8g}\right]$

$n=\left[\frac{f{R}^{1/3}}{8g}\right]$