Figure 3

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Figure 3. Time-series orthophoto maps showing the evolution of the proglacial zone from 1953 to 2009 (map extent is indicated in figure 1). Since 1953, more than 785 × 10³ m² of proglacial terrain have been exposed by glacial retreat. A proglacial developed that reached its greatest extent in 1979. The lake was filled to an outwash plain (sandur) within less than 20 years, what illustrates the rapidity of glacifluvial sedimentation. The sandur and a braid plain are key landforms within the proglacial zone modulating sediment yield.

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Martin Geilhausen, Zurich University of Applied Sciences
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