broad-crested weir calculator

enter the value and click "calculate", the calculation result will be displayed.

formula:
q = Cd × b × h2 × (2g (h1 - h2)) 1/2

weir width:
m
head on the weir 1 (h1）:
m
the water head on the weir 2 (h2）:
m
discharge constant (cd） :

calculation result:

water flow (q):
what is a wide-top weir? weirs installed on streams and rivers serve a variety of purposes and come in different types.
search calculator