Q. The differential equation of the gradually varied flow can be written by using Manning’s Formulafor the case off a wide rectangular channel as (dy/dx) = (Solved)

1. s0{[1-(yn/y)3.33]/[1-(yn/y)3]}

2. s0{[1-(yc/y)3.33]/[1-(yc/y)3]}

3. s0{[1-(yn/y)3]/[1-(yn/y)3]}