Open Channel Flow

In a rectangular open channel, the minimum specific energy $E_{min}$ in terms of critical depth $y_c$ is:

Options:

• (A) $E_{min} = 1.5 y_c$
• (B) $E_{min} = 2.0 y_c$
• (C) $E_{min} = 1.25 y_c$
• (D) $E_{min} = 2.5 y_c$