The apparatus sits on top of the channel, the hopper is filled with dry sediment (sand). Below the hopper is a variable amplitude vibrating plate that causes the sand to move along the chute from which it drops into the flow in the channel.

The rate at which the sediment falls onto the chute from the hopper is adjustable.

Basics (supplied with the fc80 flume)

• (A) 2 x level gauges used to measure the depth of the water in the flume
• (B) Broad-crested weir to allow demonstrations and investigations into how the fl ow in an open channel can be measured using a broad crested weir
• (C) Pitot tube used to measure the total head at a set height in the flume
• (D) Sharp-crested weir used to measure the volumetric flowrate
• (E) 2 x sluice gates used to control the fl ow rate of water for many of the experiments
• (F) Venturi fl ume to illustrate how fl ow in an open channel can be measured using the Venturi effect
• 2 x 25 kg bags of ‘fi ne’ grade sand and 2 x 25 kg bags of ‘coarse’ grade sand (not shown)

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