Joekulhlaups in Iceland: Characteristics and Impact

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Iceland, Floods, Erosion, Canyons

Scientific paper

Glacier outburst floods, joekulhlaups, are frequent in Iceland. They can be traced to three types of sources: (1) to subglacial lakes at geothermal areas, (2) to melt water drained during volcanic eruptions, and (3) to marginal ice dammed lakes. Joekulhlaups are major events; they may profoundly affect landscape and they threaten human life and property. In Iceland, joekulhlaups have caused loss of lives, ruined farms and cultivated land, and devastated large vegetated areas. They threaten roads, bridges, and hydroelectric power plants on glacier-fed rivers. Their effects on landscape are seen in the erosion of large canyons and in the transport and deposition of sediments over sandur deltas. The present lecture gives an overview of joekulhlaups in Iceland, their sources, triggering, and drainage. Additional information is contained in original extended abstract.

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