Abstract
Abstract
The hydrographs of two jökulhlaups resulting from the sudden drainage of
an ice-dammed lake in West Greenland in 1984 and 1987 are compared. The
first flood had a similar peak discharge to the second but drained only
two-thirds of the total volume of the 1987 event which amounted to 32–36 ×
106 m3 in 36 h. Calculations
based on the lake refill time suggest that it drains every 2–3 years, but
that peak flows may be variable from flood to flood. The timing of the
jökulhlaups in relation to the melt season may reflect variations of water
pressure within the subglacial drainage networks, and changes in the
configuration of these networks and the positions of crevasses on an annual
basis.
Publisher
International Glaciological Society
Cited by
52 articles.
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