Bayonet GPE overtopping: a modelling tool at the cutting-edge of coastal engineering
Bayonet GPE – the free online overtopping tool developed at HR Wallingford – is now live for coastal engineers at www.overtopping.co.uk. The tool builds on more than three decades of computer modelling in the field, and employs sophisticated statistical modelling to predict overtopping with a wider range of information than ever before.
Since we developed the first wave overtopping computer model in the 1980s, the field has moved on apace. The latest model, Bayonet GPE, uses the powerful statistical ‘Gaussian Process Emulator’ (GPE) technique, replacing the more traditional neural network model. Used to predict overtopping, GPE modelling better predicts uncertainty by capturing a wide range of sources, including the fitting process and errors from laboratory data that historically haven’t been taken into account. Uncertainty has significant implications at the design stage of a project so better overtopping predictions are a big advantage when conceiving coastal structures.
Dr Tim Pullen, project director, says: “Bayonet GPE allows engineers to test a wide range of sea wall types and specifications such as berms, rock-armoured toes and upper walls – against a detailed range of sea conditions. We hope the tool will be invaluable to coastal engineers and professionals throughout the industry.