Articles | Volume 20, issue 3
https://doi.org/10.5194/hess-20-1049-2016
https://doi.org/10.5194/hess-20-1049-2016
Research article
 | 
08 Mar 2016
Research article |  | 08 Mar 2016

Fault damage zone volume and initial salinity distribution determine intensity of shallow aquifer salinisation in subsurface storage

Elena Tillner, Maria Langer, Thomas Kempka, and Michael Kühn

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Short summary
The degree of shallow aquifer salinisation triggered by fluid injection into deeper brine-bearing aquifers and brine upward migration through hydraulically conductive faults strongly depends on the regional depth of the freshwater-saltwater boundary, since displaced brines originate only from the upper fault damage zones in the study area. The highest local salinity increase in shallow aquifers occurs in case of closed model boundaries and low fault damage zone volumes.