Canal Design and Silt Theories

In Lacey's regime theory, the regime flow velocity $v$ in terms of discharge $Q$ and silt factor $f$ is given by:

Options:

• (A) $v = \left(\frac{Q f^2}{140}\right)^{1/6}$
• (B) $v = \left(\frac{Q f}{140}\right)^{1/3}$
• (C) $v = \left(\frac{Q^2 f}{140}\right)^{1/4}$
• (D) $v = \frac{Q f}{140}$