1. Senior Engineer, IUB Engineering, Belpstrasse 48, CH-3000 Bern, Switzerland; formerly, Laboratory of Hydraulic Constructions (LCH), École Polytechnique Fédérale de Lausanne (EPFL), Station 18, CH-1015 Lausanne, Switzerland.
2. Research and Teaching Associate, LCH, EPFL, Station 18, CH-1015 Lausanne, Switzerland (corresponding author).
3. Professor, LCH, EPFL, Station 18, CH-1015 Lausanne, Switzerland.