Hydrological Sciences Journal is the official journal of the International Association of Hydrological Sciences (IAHS) and provides a forum for original papers and for the exchange of information and views on significant developments in hydrology worldwide. The scope of the journal includes: •the hydrological cycle on the Earth •surface water, groundwater, snow and ice, in all their physical, chemical and biological processes, their interrelationships, and their relationships to geographical factors, atmospheric processes and climate, and Earth processes including erosion and sedimentation •hydrological extremes and their impact •measurement, mathematical representation and computational aspects of hydrological processes •hydrolo...