Subglacial groundwater flow during the last glaciation in northwestern Germany

  • Piotrowski J
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Abstract

Reconstruction of groundwater flow in overpressured soft sediments overridden by the last (Weichselian) ice sheet in northwestern Germany about 18,000 ka B.P., based on numerical modelling, reveals a complete reorganisation of groundwater dynamics as compared to the present system. Groundwater flow, controlled by potentiometric surface high up in the ice sheet and by a steep hydraulic gradient at the glacier periphery, was here up to 30 times faster than at present and a vertical flow component penetrated the entire thickness of Quaternary sediments reaching some 200 m in places.

Author-supplied keywords

  • Glaciation
  • Hydrology
  • Subglacial groundwater

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Authors

  • Jan A. Piotrowski

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