1. Competence Centre
for Decision-Aid
in Environmental Management, University of Natural Resources and Applied Life Sciences/DIB, Gregor Mendel Strasse
33, A-1180 Vienna, Austria
2. Center for Environmental Management and Decision Support, Gregor Mendel Strasse
33, 1180 Vienna, Austria
3. SAR Chair, Institute for Water
and Waste Water Treatment, Durban University of Technology, P.O. Box 1334, Durban 4000, South Africa