Lime slurry from a water treatment plant is sent to a rectangular settling canal where the supernatant clear liquid is discharged over the weir at the far end of the canal. The settled lime sludge is pumped out through a bottom hopper at the end of the canal. Experiments show that the settling velocity of the lime sludge is 1.0 cm/min, with the slurry flowing along the canal at a linear velocity of 1.0 m/min. If the average depth of

100 m

1.0 m

3.67 m

3.33 m