Crump weirs are control structures. They are broad-crested weirs. The triangular shape of the weir has several advantages, e.g. only minor siltation occurs upstream of the weir. A part of sediment transport can flow over the weir. In addition, aquatic creatures can often pass this weir upstream.
The Crump weir is preferably used as a sill. Sills are used to decrease the flow velocity to avoid erosion. A sill is well dimensioned for the prevailing discharge when there is no hydraulic jump.
- Made of gray PVC,
- Overall dimensions: 98 x 350 x 50 h mm,
- Structure for anchoring to the channel and seals.