1. Luxembourg Institute of Science and Technology; Department of Environmental Research and Innovation; 41 rue du Brill L-4422 Belvaux Luxembourg
2. Global Institute for Water Security; University of Saskatchewan; 11 Innovation Boulevard Saskatoon Saskatchewan S7N 3H5 Canada
3. School of Geosciences; University of Aberdeen; Aberdeen AB34 3FX UK
4. Oregon State University; Department of Forest Engineering, Resources and Management; 015 Peavy Hall Corvallis OR 97331-5706 USA