NERC funded a joint Cambridge-Southampton three-year project on “Integrated Approaches to Modelling Hydrology and Water Quality in Glacierised Catchments”, which was focused on the Haut Glacier d’Arolla (HGA) in Switzerland. The idea was to monitor drainage system evolution by using changes in the hydrochemistry of the bulk meltwaters leaving the glacier, in tandem with an intensive programme of dye injections into multiple supraglacial streams and moulins that would provide a direct measure of water transit times though the glacier and their changes over a full melt season (Richards et al., 1996).

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HGA (Fig. 4.1) is...

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