INTERNATIONAL HYDROLOGICAL PROGRAMME _____________________________________________________________ Monitoring and modelling catchment water quantity and quality 8 th Conference of the European Network of Experimental and Representative Basins (ERB) Ghent (Belgium), 27 – 29 September 2000 Convened by: ERB and UNESCO/IHP (FRIEND) PROCEEDINGS Edited by Niko Verhoest, Jim Hudson, Rudi Hoeben and François De Troch IHP-VI Technical Documents in Hydrology  No. 66 UNESCO, Paris, 2003 (SC-2003/WS/16)