50 p. Ill. With ref. With app. Master thesis of Civil Engineering at the University of Twente Fulfilled at Ministry of Transport, Public Works and Water Management = Ministerie van Verkeer en Waterstaat, Rijkswaterstaat, National Institute for Coastal and Marine Management = Rijksinstituut voor Kust en Zee (RWS, RIKZ) Supervisors: M. Boers (RIKZ), S.J.M.H. Hulscher (UT), H.H. van der Veen (UT) Workdocument RIKZ/OS/2004.104W Project: K2005*ZEEBODEM Programme: KUST2005 Summary of the workshop ‘Modelling sand mining on the Zeeland ridges’, held on November 18th 2003 at the Rijksinstituut voor Kust en Zee (RIKZ) in The Hague