Find the critical depth and critical velocity of the water flowing through a rectangular channel of width 5m, when discharge is $15 m^3/s$

Given:

width of channel, b = 5m

Discharge Q = $15 m^3/s$

$\therefore$ Discharge per unit width,

$q = \frac{Q}{b}$

$= \frac{15}{5}$

= 3$m^2/s$

Critical depth : …