1. Hydraulic Engineer, Hetzer, Jäckli und Partner AG, Turbinenweg 5, Postfach, CH-8610 Uster, Switzerland; formerly, Laboratory of Hydraulics, Hydrology, and Glaciology, Swiss Federal Institute of Technology Zurich, CH-8093 Zürich, Switzerland (corresponding author).
2. Hydraulic Engineer, Laboratory of Hydraulics, Hydrology, and Glaciology, Swiss Federal Institute of Technology Zurich, CH-8093 Zürich, Switzerland.
3. Head of Hydraulic Structures Division, Laboratory of Hydraulics, Hydrology, and Glaciology, Swiss Federal Institute of Technology Zurich, CH-8093 Zürich, Switzerland.
4. Professor, Laboratory of Hydraulics, Hydrology, and Glaciology, Swiss Federal Institute of Technology Zurich, CH-8093 Zürich, Switzerland.
5. Professor and Director, Laboratory of Hydraulics, Hydrology, and Glaciology, Swiss Federal Institute of Technology Zurich, CH-8093 Zürich, Switzerland.