1. ETH Engineer; formerly, Versuchsanstalt für Wasserbau, Hydrologie und Glaziologie VAW, ETH-Zentrum, CH-8092 Zurich, Switzerland.
2. Professor, Swiss Federal Institute of Technology (ETH), Laboratory of Hydraulics, Hydrology and Glaciology (VAW), Gloriastrasse 37/39, ETH-Zentrum, CH-8092 Zurich, Switzerland.