Water and Wastewater Terms Beginning V

A B C D E F G H I J K L M N O P Q R S T U V W Y Z

V-notch weir

A triangular weir with a V-shaped notch calibrated in gallons (liters) per minute readings. The weir can be placed in a pipe or open channel. As the flow passes through the V-notch, the depth of water flowing over the weir can be measured and converted to a flow in gallons (liters) per minute.