Groynes and guide bunds are specifically
designed and located within a watercourse
to divert the flow away from the banks
reducing hydraulic erosion damage.
They are suitable when the river is wide enough and
when the banks can be modified.

• They are active systems and influence sedimentation in the watercourse.
• The frequency and shape of groynes alters the deposition regime and erosion protection offered.
• The hydraulic regime is rapidly altered by groynes and great care is required in the design.

Groyne spacing:
The intensity and location of siltation depends on the ratio of the of the groyne spacing relative to its length. Our technical teams can support you with your hydraulic works problems.