1 / 11

Transport processes in deep and shallow aquifers: mechanisms and interactions

Transport processes in deep and shallow aquifers: mechanisms and interactions. Dr. Fabien Magri (GFZ, Potsdam / FU Berlin , Germany ), Enno Bregman ( Province of Drenthe / Utrecht Univ., Netherlands ).

madge
Download Presentation

Transport processes in deep and shallow aquifers: mechanisms and interactions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Transport processes in deep and shallow aquifers: mechanisms and interactions Dr. Fabien Magri (GFZ, Potsdam / FU Berlin, Germany), Enno Bregman (ProvinceofDrenthe / Utrecht Univ., Netherlands)

  2. The North East German Basin (NEGB)In several areas shallow groundwater is anomalously salty Modified after Grube at al. 2000

  3. NEGB ExampleNumerical simulations are carried along a representative 2D cross-section Data: Scheck and Bayer, 1999

  4. NEGB ExampleSimulations indicate that deep brines can be lifted up by heat Magri et al. 2005

  5. NEGB ExampleSimulations indicate that deep brines can be lifted up by heat Magri et al. 2005

  6. NEGB ExampleShallow salt domes generate instable concentration gradient Magri et al. 2007

  7. NEGB ExampleFreshwater resources in Pleistocene channels can be threatened

  8. The Drenthe Area ExampleSimulations show features similar to the NEGB example

  9. The Drenthe Area ExampleSimulations show features similar to the NEGB example

  10. The Drenthe Area ExamplePumping wells can enhance brine up-coning

  11. Conclusions • The results indicate that the salinity patterns observed at the surface have a deep origin • Heat flow can induce upward brine migration • Topography-driven flow (i.e. regional flow) seems to be the most likely mechanism controlling brine outflow • The presence of deep glacial channels can provide preferential pathways through which dissolved halite can mix with shallower freshwater • Further research is needed to calibrate the results with the observed patterns-> multidisciplinary approach, 3D modeling

More Related