© 2015 Cardiff Scientific Society

4 Feb The Severn Barrage and its Potential Hydro-Environmental Impact on the Estuary
- Professor Roger A. Falconer PhD DSc FREng
School of Engineering, Cardiff University
The presentation will review the current main Severn Barrage proposals, and review alternative options such as Offshore Tidal Impoundments. In particular, emphasis will focus on assessing the potential hydro-environmental impact of a barrage on the estuary. An outline will be given of recent research undertaken at Cardiff University on bacterial-sediment interactions and the application of computational hydro-environmental models to predict the impacts of a Barrage on tidal elevations and currents, sediment transport and water quality indicator levels. The presentation will show that the Barrage will reduce the tidal currents in a highly dynamic estuary, leading to reduced suspended sediment loads, increased light penetration within the water column and a change in the bio-diversity in parts of the estuary.