where (S_0) = bed slope, (S_f) = friction slope, (Fr) = Froude number. Problem: Rectangular channel, width 3 m, discharge 12 m³/s, Manning’s n = 0.015, bed slope 0.001, normal depth 1.8 m. Compute water surface profile for a 200 m length.

[ \frac{dy}{dx} = \frac{S_0 - S_f}{1 - Fr^2} ]

Open Channel Flow Madan Mohan Das Pdf Apr 2026

where (S_0) = bed slope, (S_f) = friction slope, (Fr) = Froude number. Problem: Rectangular channel, width 3 m, discharge 12 m³/s, Manning’s n = 0.015, bed slope 0.001, normal depth 1.8 m. Compute water surface profile for a 200 m length.

[ \frac{dy}{dx} = \frac{S_0 - S_f}{1 - Fr^2} ]