1. Northern Rivers Institute, Department of Geography and Environment, School of Geosciences; University of Aberdeen; St. Mary's Building, Old Aberdeen AB24 3UF Aberdeen Scotland UK
2. Fluvial Dynamics Research Group-RIUS, Department of Environment and Soil Sciences; University of Lleida; Av. Alcalde Rovira Roure, 191 E-25198 Lleida Catalonia Spain
3. Catalan Institute for Water Research; H 2 O Building E-17003 Girona Catalonia Spain
4. Forest Sciences Centre of Catalonia; Crta. Sant Llorenç de Morunys, km 2 E-25280 Solsona Catalonia Spain
5. Department of Geography and Earth Sciences; Aberystwyth University; SY23 2AX Aberystwyth UK