Borehole drainage and its implications for the investigation of glacier hydrology: experiences from Haut Glacier d'Arolla, Switzerland.

Presents techniques to identify borehole water sources and to reconstruct pattern of water circulation within boreholes in Switzerland. Types of borehole drainage and its influence on the interpretations of borehole water levels, borehole water quality and borehole dye traces; Subglacial hydrology; Borehole salt tracing; Electric conductivity profiling.