Guidelines on the geometry of groynes for river training

This guide describes recommendations for positioning river groynes and a method for determining the flow velocity at key locations in the flow field. A three-dimensional numerical model was used to predict flows in a number of configurations of groynes. This is the second of two reports investigating the use of a three-dimensional numerical model to model river groynes. The first report, (…SR 480) described the validation of the numerical model against laboratory experiments. This report uses the results of the validated model to predict flows in a straight channel with a number of configurations of river groynes.