1. Division for Quantitative Sustainability
Assessment, Department of Management Engineering, Technical University of Denmark, Nils Koppels Alle, Building 426D,
DK-2800 Kgs. Lyngby, Denmark
2. Department of Environmental
Science, Institute for Wetland and Water Research, Faculty of Science, Radboud University Nijmegen, P.O. Box 9010, NL-6500
GL Nijmegen, The Netherlands