Weir

A weir /ˈwɪər/ is a barrier across a river designed to alter its flow characteristics. In most cases, weirs take the form of obstructions smaller than most conventional dams, pooling water behind them while also allowing it to flow steadily over their tops. Weirs are commonly used to alter the flow of rivers to prevent flooding, measure discharge, and help render rivers navigable. Weirs are also used in the study of returning salmonids.

Function

Weirs allow hydrologists and engineers a simple method of measuring the volumetric flow rate in small to medium-sized streams or in industrial discharge locations. Since the geometry of the top of the weir is known and all water flows over the weir, the depth of water behind the weir can be converted to a rate of flow. The calculation relies on the fact that fluid will pass through the critical depth of the flow regime in the vicinity of the crest of the weir. If water is not carried away from the weir, it can make flow measurement complicated or even impossible.

Weirs (album)

Weirs is a collaboration between Luke Vibert and Jeremy Simmonds. The album was pressed to CD and vinyl in which the vinyl pressing received additional tracks. Rodulate, featuring outtakes from the sessions for this album was released in 2008.

Track listing

CD version

2X12" vinyl

Side A

Side B

Side C

Side D

References