What is the difference between Spillway and Weir?

The difference between spillway and weir

is that "spillway" is a path designed to take away overflow safely and "weir" is an adjustable dam placed across a river to regulate the flow of water downstream.

spillway

weir

Noun

  • A path designed to take away overflow safely.

Exemple

  • Absence of filtered undrains beneath spillways or behind walls.

Noun

  • An adjustable dam placed across a river to regulate the flow of water downstream.
  • A fence placed across a river to catch fish.

Coordinate terms

  • (adjustable dam): dam, sluice

Examples

  • The weir must not represent a physical barrier to fish migration, both locally and throughout the whole river system. If necessary, 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.
  • For a spell we done pretty well. Then there came a reg’lar terror of a sou’wester same as you don’t get one summer in a thousand, and blowed the shanty flat and ripped about half of the weir poles out of the sand.