1. Waternet, PO Box 94370, 1090 GJ, Amsterdam, The Netherlands
2. Delft University of Technology, Faculty of Civil Engineering and Geosciences, Department of Water Management, PO Box 5048, 2600 GA, Delft, The Netherlands
3. UReason International, Pompoenweg 9, 2321 DK, Leiden, The Netherlands
4. DHV BV, PO Box 1132, 3800 BC, Amersfoort, The Netherlands