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  • Seasonal changes in the morphology of the subglacial drainage system, Haut Glacier d'Arolla, Switzerland
  • Ablation glaciaire ; Drainage ; Eau de fonte ; Glacier ; Hydrologie ; Suisse ; Traceur ; Valais
  • Dye tracing techniques were used to investigate the glacier-wide pattern of change in the englacial/subglacial drainage system of Haut Glacier d'Arolla during the ablation seasons of 1990 and 1991. In both years, the tracer injection programme began
  • as soon as runoff was detected at the glacier surface. Analysis of breakthrough curve characteristics indicate that over the course of a melt season, a system of major channels developed by headward growth at the expense of a hydraulically inefficient
  • distributed system. Damping of diurnal melt inputs by storage in the firn aquifer accounts for the slowing of channel growth in the upper glacier.
  • 1998