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A type of small overflow dam.

Weir Box

A type of small overflow dam.

A small overflow dam placed in concrete.

Cippoletti Weir Set in Concrete

A small overflow dam placed in concrete.

A weir is a rectangular orifice that is used to measure water discharge. In this example, the top of the weir is level with the top of the top of the box it is on.

Weir

A weir is a rectangular orifice that is used to measure water discharge. In this example, the top of…

A weir is a fancy name for a rectangular opening. Some even give it another name: rectangular notch.

Weir

A weir is a fancy name for a rectangular opening. Some even give it another name: rectangular notch.