1. Unit of Environmental Engineering, Institute of Infrastructure, University of Innsbruck, Technikerstr. 13, Innsbruck A-6020, Austria E-mail: stefan.achleitner@uibk.ac.at; stefan.fach@uibk.ac.at; wolfgang.rauch@uibk.ac.at
2. alpS–Centre for Natural Hazard and Risk Management, Grabenweg 3, Innsbruck A-6020, Austria E-mail: achleitner@alps-gmbh.com
3. Hydro & meteo GmbH&Co.KG, Breite Str. 6-8, Lübeck D-23552, Germany E-mail: einfalt@hydrometeo.de