1. Institute of Environmental Engineering, Department of Civil, Environmental and Geomatic Engineering, ETH Zürich, Stefano-Franscini-Platz 5, 8093 Zürich, Switzerland
2. Swiss Federal Institute for Forest, Snow and Landscape Research, WSL, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
3. Department of Civil Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
4. Department of Meteorology, University of Reading, Earley Gate, P.O. Box 243, Reading RG6 6BB, United Kingdom
5. Swiss Federal Institute for Aquatic Science and Technology, Ueberlandstrasse 133, 8600 Dübendorf, Switzerland