Author(s)

J.M. Lourens & P. de Voogt

Abstract

The impact of pesticides in the North Sea: preliminary results J.M. Lourens," P. de Voogt* o Ministry of Transport and Public Works, Tidal Water Division, 2500EX The Hague, The Netherlands & Department of Environmental and Toxicological Chemistry, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands ABSTRACT The presence of pesticides in the Dutch coastal zone is studied by field measurements and a model approach. Most concentrations of pesticides studied were below detection limits in the coastal zone of the Netherlands in 1991, except 4,4'-DDT, B-HCH, DNOC, dinoseb, dinoterb, metoxuron, chlorotoluron, isoproturon, diuron and methobromuron. With a simple model the transport and fate of pesticides from application area to coastal zone was estimated. Observed (fieldwork) and estimated (model) concentrations were compared with guidelines and risk levels. From the 14 pesticides investigated in the model stud

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