# Design of Canal using Lacey method

## Lacey’s Silt factor, f

=\LARGE1.76\sqrt(d_{mm})

## Flow Velocity, v

=\LARGE(\frac{Qf^2}{140})^\frac{1}{6}

## Hydraulic Radius, R

=\LARGE\frac{5v^2}{2f}

## Wetted Perimeter, P

=\LARGE4.75\sqrt(Q)

## Bed Slope, S

=\LARGE\frac{f^\frac{5}{3}}{3340Q^\frac{1}{6}}