Print Email Facebook Twitter National Evaluation Report of the Joint Assessment and Monitoring Programme of the Netherlands 2001 Title National Evaluation Report of the Joint Assessment and Monitoring Programme of the Netherlands 2001 Author Bovelander, R.W. Akhiat, A. Corporate name Rijkswaterstaat Project JAMP Date 2003-01-01 Abstract The Netherlands participates in the Joint Assessment and Monitoring Programme (JAMP) of the Oslo and Paris Commissions. This report presents the results of the Dutch contribution to the programme 2001 and the sediment results of 2000 which were not yet available at the time of the last evaluation report of the Netherlands in 2000 (ref.19). Tributyltin (TBT) in water from inland marinas has been monitored ever since 1990. From the resultant data it is clear that there has been a decrease in TBT since the ban on the use of TBT on vessels less than 25 metres in length. Recent data on TBT from the monitoring of sediment indicate relatively high concentrations of TBT and triphenyltin (TPhT) in all Dutch marine waters. TBT concentrations measured range between 3 and 212 ?g TBT/kg sediment normalised to 5% organic Carbon. This implies that the Dutch target value MTR (Maximum Tolerable Risk concentration) of 0.7 ?g/kg, laid down in the Fourth National Policy Document on Water Management is being exceeded by a factor 4.5-300. The highest TPhT concentration was about 50 ?g TPhT/kg sediment normalised to 5% organic Carbon, the lowest values were below the detection limit (<5 ?g TPhT/kg). Fish disease monitoring has been included in the programme since 1991, the results of 2001 are presented in this report. The results of these assessments showed in the Western Scheldt an increasing trend for Cadmium in Flounder, as against a decreasing trend in Mussels. The water and SPM data for the Western Scheldt cannot explain this increase of Cadmium in Biota. The Cadmium concentration in SPM has been around 1 mg/kg dry weight and is slightly decreasing (27%) while dissolved concentrations show a decrease of 70% over the last decade. Even sediment data from 1988 up to 2001 show no evident change in cadmium concentrations. The report describes the quality assurance programme of the Dutch laboratories and gives details of detection limits and participation in QUASIMEME exercises. Subject JAMP2001TributyltinTBTwater pollutionwater qualityfish disease Classification LBR00 To reference this document use: http://resolver.tudelft.nl/uuid:d61e803c-1760-48b7-841f-066bd1b82a21 Publisher Rijkswaterstaat, RIKZ Source Rapportnr.: 2003.004 Part of collection Hydraulic Engineering Reports Document type report Rights (c) 2003 Rijkswaterstaat Files PDF rikz2003004.pdf 1.17 MB Close viewer /islandora/object/uuid:d61e803c-1760-48b7-841f-066bd1b82a21/datastream/OBJ/view