Glasgow Green Tidal Weir

The Weir's purpose is to stabilise the upstream banking, by maintaining a fixed water level, creating a deep, wide channel of water through the Green. Downstream of the Weir is entirely tidal, alternating between fresh and sea water.

The change from fresh water to salt water within river estuaries usually happens gradually over a number of miles. The Weir creates an unnatural situation: two distinct ecosystems separated by a barrier. This mix provides an important habitat for a range of birds, fish and mammals.