weir

pato

katiska An adjustable dam placed across a river to regulate the flow of water downstream.
1997, J. H. L'Abée-Lund & J. E. Brittain, "Weir construction as environmental mitigation in Norwegian hydropower schemes", Hydropower 97'', pages 51-54.

The weir must not represent a physical barrier to fish migration, both locally and throughout the whole river system. If necesary, a fishway is included in the weir.

A walkway over the weir is likely to be useful for the removal of floating debris trapped by the weir, or for working staunches and sluices on it as the rate of flow changes.

The weir catch of mackerel at Monomoy and along Cape Cod has been a failure.