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3.7
Installing the Optional Roughened Bed Sections
The artificially roughened (gravel) bed relies on its own weight to hold it onto the channel
bed. It is aided by a bed end stop which is similar to the stretcher screw used on the Venturi
flume except that it clamps between the channel side walls. This acts as a stop which
prevents the gravel bed from sliding along the channel bed.
3.8
Sealing models into the flume
Plasticine is supplied with the flumes. This is used on the leading edge of the model and is
placed between the side walls and bed of the channel and the sides of the model. This is to
ensure that water flows over the model and not around or under it.
3.9
Use of Stop Logs to Vary Flume Flow Depth
The stop logs supplied slot into the discharge end of the channel. They may be used singly
and in combination to raise the water level within the flume to different heights. Gaps
between the logs may be sealed with Plasticine if required, but this is not usually necessary.
