Physical modelling of local scour around bridge piers is challenging due to the three
different similarity criteria that need to be satisfied for the complete similitude of the model
and the prototype. To achieve the complete similitude, geometry, flow and sediment material
in the model scale need to be scaled simultaneously. Aim of this paper is to calculate the
scale parameters of the physical model used for scour assessment next to piers protected
with riprap. The scale parameters are calculated individually for each prototype-two bridges …