- the raised inlet sill to prevent entry of the bedload of the river;
- the skimmer wall (with splitter pier) at the inlet to trap floating ice
and debris; - the coarse rack (trash rack) to trap subsurface trash, equipped with
either manual or automatic power-driven rack cleaning devices; - the settling basin (sand trap) followed by a secondary sill (entrance
sill) diverting the bottom (sediment-laden) layers towards the desilt-
ing canal; - the flushing (desilting) sluice to flush the deposited silt;
- the intake (head regulator) gates to control the flow rate into the
canal; - the scouring (tunnel) sluices in the diversion weir to flush the
bedload upstream of the inlet sill.
INTAKES 393
Fig. 9.16 Canal intake on a river carrying heavy bedload (after Mosonyi,
1987)