Engineering Paddler Designs

Thames Weirs

Approached by the Environment Agency and employed by both Halcrow and Atkins, EPD undertook sub contractor work to improve safety and reduce the hazards posed by new radial gate hydraulic control structures at both Shepperton B weir and Radcott weir both on the River Thames. Deflector plates were designed and tested at a range of flow (head and tailwater levels) within a physical hydraulic model and their optimum position derived. The deflectors form a weak spot in the centre of the powerful hydraulic jump formed at the bottom of the gates. The central weak spot allows a semi-buoyant object to be flushed away from the powerful tow back into the hydraulic jump.