Back to profile profile_subnav_projects - dr.ir. JWM (Jeroen) Wijsman Knowledge and research for mussel production (KOMPRO) - Amazing Grazing A large proportion of mussel fisheries and mussel farming takes place in nature reserves. For this reason, mussel production is governed by strict... Effects of sand extraction on the Zeeland Banks The quantity of shell grit and sand extracted from the Zeeland Banks is increasing due to the growing demand for sand for coastal defences and... Ecological monitoring - the sand motor A huge amount of sand was laid near Kijkduin in 2011 to be distributed further across the beach by the natural currents: the so-called 'sand motor'....