University of Wuppertal, Working Group General Geography/Human-Environment Research, Gaußstrasse 20, 42119 Wuppertal, Germany

formerly at: Leuphana University of Lüneburg, Germany

UNESCO-IHE Delft, Department of Hydroinformatics and Knowledge Management, Westvest 7 2611 AX Delft, The Netherlands

Imperial College London, Department of Civil and Environmental Engineering, London, SW7 2AZ, UK

University of Wuppertal, Working Group General Geography/Human-Environment Research, Gaußstrasse 20, 42119 Wuppertal, Germany

formerly at: Leuphana University of Lüneburg, Germany

Imperial College London, Department of Civil and Environmental Engineering, London, SW7 2AZ, UK

UNESCO-IHE Delft, Department of Hydroinformatics and Knowledge Management, Westvest 7 2611 AX Delft, The Netherlands

formerly at: Leuphana University of Lüneburg, Germany

CNR-IRPI, National Research Institute for Geohydrological protection, Via Madonna Alta, 126 – 06128 Perugia PG Umbria, Padova, Italy

formerly at: UNESCO-IHE Delft, The Netherlands

UNESCO-IHE Delft, Department of Hydroinformatics and Knowledge Management, Westvest 7 2611 AX Delft, The Netherlands

Imperial College London, Department of Civil and Environmental Engineering, London, SW7 2AZ, UK

Imperial College London, Department of Civil and Environmental Engineering, London, SW7 2AZ, UK

National Technical University of Athens, School of Civil Engineering, 28 Oktovriou (Patision) 42, 10682 Athens, Greece