E l e c t r o n i c r e p r i n t
Supraglacial streams are usually devoid of sedimentary material and clastic bank material. Their development is not controlled by any vegetation. Water discharge is characterised by high velocities (up to several m s-1), is usually restricted to the ablation season, and as a rule displays a regular diurnal rhythm. Variations in the discharge produce either low- or high-energy streamflows, both at a short (diurnal) and a longer (seasonal or annual) time scale.
These features of supraglacial streams make them excellent objects for the study of channel hydraulics on the one hand, and the relief of the glacier surface in the context of ablation processes on the other. The aim of the present work is to elucidate selected mechanisms of glacier ablation as reflected in the morphological and hydraulic conditions of a supraglacial stream.