The 4^th Steering Committee Meeting was held on the 12^th of June 2017 at the University of Exeter.

Recent devlopments in experimental modelling (e.g. velocity measurements, effect of debris elevation on scour depth at a pier, and scour protection by riprap) and CFD modelling (model validation and 12th OpenFOAM Workshop at the University of Exeter) were discussed. This was followed by a discussion on the results.