Types of Weirs

There are different types of weirs. It may be a simple metal plate with a V-notch cut into it, or it may be a concrete and steel structure across the bed of a river. A weir that causes a large change of water level behind it, compared to the error inherent in the depth measurement method, will give an accurate indication of the flow rate.

1. Sharp crested weir
2. Broad crested weir (or broad-crested weir)
3. Crump weir (named after the designer)
4. Needle dam
5. Proportional weir
6. Combination weir
7. MF weir
8. V-notch weir
9. Rectangular weir
10. Cipolletti (trapezoidal) weir
11. Labyrinth weir