Aquatic Sciences

, Volume 69, Issue 1, pp 138–152 | Cite as

Coupling of groundwater and surface water at Lake Willersinnweiher: Groundwater modeling and tracer studies

  • Ute Wollschläger
  • Johann Ilmberger
  • Margot Isenbeck-Schröter
  • Andreas M. Kreuzer
  • Christoph von Rohden
  • Kurt Roth
  • Wolfgang Schäfer
Research Article

Abstract.

Coupling between groundwater and surface water at Lake Willersinnweiher, a gravel pit lake in the Upper Rhine Graben without any surface in- or outflow, was investigated using both a groundwater model and the tracers 18O and SF6. Based on groundwater modeling, recharge and discharge areas around the lake as well as the residence time of the lake water were determined in a regional context. The uncertainty of the simulated flow field was assessed by sensitivity analysis. The tracers 18O and SF6 were measured in several observation wells and piezometers around the lake as well as in the lake’s water column. They were used to verify groundwater flow directions found in the modeling. We found that the groundwater-lake interaction model had a large uncertainty even though relatively detailed information on input data was available. Independent information obtained from the environmental tracers allowed us to improve and verify the model.

Keywords.

Groundwater modeling 18SF6 uncertainty analysis water budget lakes 

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Copyright information

© Eawag, Dübendorf 2007

Authors and Affiliations

  • Ute Wollschläger
    • 1
  • Johann Ilmberger
    • 1
  • Margot Isenbeck-Schröter
    • 2
  • Andreas M. Kreuzer
    • 1
  • Christoph von Rohden
    • 1
  • Kurt Roth
    • 1
  • Wolfgang Schäfer
    • 3
  1. 1.Institute of Environmental PhysicsUniversity of HeidelbergHeidelbergGermany
  2. 2.Institute of Environmental GeochemistryUniversity of HeidelbergHeidelbergGermany
  3. 3.Steinbeis-Transferzentrum GrundwassermodellierungWieslochGermany

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