Impact Factor (IF) - Thomson Reuters Web of KnowledgeSM)

2020: 1.500 - 5 years IF: 1.659

2019: 1.258 - 5 years IF: 1.610

2018: 1.152 - 5 years IF: 1.315

2017: 1.000 - 5 years IF: 1.000

2016: 0.938 - 5 years IF: 1.010

2015: 0.641 - 5 years IF: 0.673

2014: 0.628 - 5 years IF: 0.652

2013: 0.390 - 5 years IF: 0.504

2012: 0.605

2011: 0.468

2010: 0.309

2009: 0.136

An international Journal published under the auspices of:

Recognized by:

Volume 27 (2) - 2004


Drainage of ice-contact MiageLake (Mont Blanc Massif, Italy) in September 2004

Pages 113-119


Drainage of ice-marginal Miage Lake (36,000 m2; maximal depth = c. 30 m) in early September 2004 occurred in two stages. Initial rapid loss (c. 325,000 m3) over two days was due to increased outflow along the boundary between the glacier sole and the till substrate at a rate of up to 2 m3/s. This lowered the lake surface until separate ponds were isolated from the subglacial drainage route. Subsequent loss over weeks took place at slower rates by leakage through permeable till, most rapidly in the deepest (SE) basin where a sealing matrix of fines was absent. This point is identified as a site of continuous leakage at all lake stages. Lake volume and water balance considerations indicate a low turnover of lake water. The exposed lake bed revealed an extensive ice foot connecting the subaerial ice cliff to the subaqueous continuation of the right-lateral moraine. The ice foot showed evidence of buoyant calving from its surface prior to lake drainage. The lake floor largely consists of moraine ridges covered by a sandy-silt drape which thickens downslope, from centimetres under shallow water to > 1 m in lake-bottom hollows. The innermost moraine relates to the latest Ā«Little Ice AgeĀ» and the early 20th Century fluctuations of the glacier in the eastern basin. Drainage events are unlikely to pose a hazard, and occur infrequently (and seemingly randomly) whenever marginal crevasses link the perched ice-marginal lake to the subglacial drainage network.

→ Download Abstract PDF

→ Download Full Text PDF