Stefan Aarninkhof who is a senior project engineer at Hydronamic, the engineering group of Royal Boskalis Westminster. In 2003 he received a PhD from Delft University of Technology, the Netherlands, for a thesis on the quantification of coastal bathymetry from video imagery. Prior to joining Boskalis in 2006, he spent 10 years at Delft Hydraulics. He currently fulfills a specialist role in the field of morphology and marine environment, with a focus on the environmental aspects of dredging.