Upwelling mechanisms of deep saline waters via Quaternary erosion windows considering varying hydrogeological boundary conditions
نویسندگان
چکیده
Abstract. Intrusion of deep saline waters into freshwater aquifers does not only endanger the regional drinking water supply, but also rivers and stagnant their fauna are threatened by salinisation. The upwelling highly mineralised in large parts North German Basin is favoured presence Elsterian glacial erosion windows Lower Oligocene Rupelian Clay, most important hydraulic confining unit this region. precipitation rates decreasing groundwater levels as a consequence global climate change, anthropogenic interventions, such increasing extraction or use geologic subsurface reservoir, decrease pressure potential column may possibly accelerate primarily geogenic salinisation process coming years. Density-driven flow transport modelling was performed scope present study to investigate mechanisms across Quaternary window sediments Rupelian. Simulation results show that interactions between recharge rate interventions wells utilisation subsurface, have significant influence on aquifer associated saltwater upwelling. In all scenarios, severe windows. Hydraulically conductive faults intensify if located nearside induce more distributed localised with relevance areas do intersect A decline thereby significantly favours upward migration. simulation scenarios further occurring up 10 years earlier, which underlines need for waterworks initiate effective countermeasures quickly time.
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ژورنال
عنوان ژورنال: Advances in Geosciences
سال: 2022
ISSN: ['1680-7359', '1680-7340']
DOI: https://doi.org/10.5194/adgeo-58-47-2022