Part I : Time-averaged measurements, 32 p. Part II : Time-dependent measurements , 59 p. bijl., ill. Met lit. opg. (Part I) Prepared for European Union MAST-III Safe en the 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) Part I: Time-averaged measurements (WL-rapport ; H2305.73) Part II: Time-dependent measurements (WL-rapport ; H2305.73)