Differentiate any four points between notch and weir.

Differentiate any four points between notch and weir. 
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1 Answer

Answer :

Sr.No.
Notch
Weir
1 It is an opening provided on one side of the tank or reservoir with free surface of liquid below the top edge of the opening.
It is a structure which obstructs the flow in an open channel.
2 It is a device used for measuring the rate of flow of liquid through a small channel or a tank
It is used for measuring the rate of flow of water in rivers or streams. 
3 Notches are made of metallic plates
Weirs are made of concrete or masonry structure
4 Notch is of small sizes.
Weir is of bigger sizes.
5 e. g. Rectangular, Triangular, Trapezoidal, stepped notch.
e. g. According to shape, discharge, width of crest, nature of crest.
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