||Dr. Marcel van Gent obtained his PhD degree in 1995 in Delft. Since 1995 he joined Delft Hydraulics (presently Deltares) and since 2000 Dr. Marcel van Gent is head of the Department Coastal Structures & Waves at Deltares, Delft. His group consists of about 35 scientists and consultants providing specialist constancy using numerical models and physical model facilities. Dr. Marcel R.A. van Gent published almost 100 international scientific papers on coastal structures, wave modelling and dune erosion.