[1] Univ Bologna, Dept DICAM, Bologna, Italy
[2] Univ Wisconsin, Dept Geosci, Madison, WI USA
[3] Vienna Univ Technol, Inst Hydraul Engn & Water Resources, A-1040 Vienna, Austria
[4] Univ Illinois, Dept Civil Engn, Urbana, IL USA
[5] SUNY Buffalo, Dept Geog, Buffalo, NY USA
[6] Carnegie Inst Sci, Dept Global Ecol, Stanford, CA USA
[7] Univ Colorado, Dept Civil Environm & Architectural Engn, Boulder, CO 80309 USA
[8] Univ Politecn Cataluna, Dept Civil & Environm Engn, Barcelona, Spain