1. Phase II Quality of water and sediment of the Schelde, the Leie, the Deule and the Spierre Spatial and Temporal Assessment of high Resolution Depth Profiles Using Novel Sampling Technologies VLIZ

2. Sampling expedition December 2003

3. Location of the sampling sites

4. Schelde: Helkijn

5. Schelde: Antoing

6. Schelde: Mortangne du Nord

7. Schelde: Vieux Condé

8. Schelde: Bruay sur Escaut

9. Samples taken Surface water: –Dissolved trace metals –Major ions –Suspended matter concentrations Sediments (bulk sediments) –Trace metals –Major ions –Organic matter

10. Dissolved metals

11. Dissolved trace metals

12. Dissolved metals

14. Dissolved trace metals

16. Sediments

19. Choice of future sampling stations for Phase II L’Escaut / Schelde : –Helkijn (station 5) –Bassin Rond (station 11) La Deûle / Deule : –Deulemont (station 14) –Metal Europe (station 19) La Lys / Leie : –Warneton (station 16) –Menen (station 18)

20. Timing of sampling March-April 2004: spring June-July 2004: summer September-October 2004: autumn December-January 2005: winter

21. Parameters to be analysed in Phase II First expedition: thorough characterisation of sediments –Porewaters: pH Redox Alcalinity DOC NO 3 -, NO 2 -, SO 4 2-, Cl, NH 4 +, PO 4 3- Dissolved S Fe 2+ Trace metals Hg speciation DGT/DET: trace metals, (Hg speciation),... –Sediments POC Hg/MMHg Trace metals/ major ions AVS/CRS Sequential extractions