Hydraulic Structures: Fourth Edition

(Amelia) #1

  1. the raised inlet sill to prevent entry of the bedload of the river;

  2. the skimmer wall (with splitter pier) at the inlet to trap floating ice
    and debris;

  3. the coarse rack (trash rack) to trap subsurface trash, equipped with
    either manual or automatic power-driven rack cleaning devices;

  4. the settling basin (sand trap) followed by a secondary sill (entrance
    sill) diverting the bottom (sediment-laden) layers towards the desilt-
    ing canal;

  5. the flushing (desilting) sluice to flush the deposited silt;

  6. the intake (head regulator) gates to control the flow rate into the
    canal;

  7. 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)

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