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UID:pretalx-flowpath-2025-8KEUQS@talks.staging.osgeo.org
DTSTART;TZID=CET:20250612T121000
DTEND;TZID=CET:20250612T122000
DESCRIPTION:Karst aquifers represent complex systems where groundwater flow
 s at different velocities through a network of secondary porosity structur
 es such as fractures and conduits. Their complexity comes from the interpl
 ay between geological and climatic factors\, as well as human activities\,
  like tapping springs and drilling tunnels\, which can significantly chang
 e flowpaths and discharge regimes.\nThe Gran Sasso aquifer\, one of the la
 rgest fractured and karstified aquifers in the central Apennines\, offers 
 a unique opportunity to study these phenomena thanks to the presence of dr
 ainage in highway tunnels\, drilled in the 1970s. These tunnels tapped app
 roximately 2 m³/s of groundwater directly under the preferential recharge
  zone\, providing access to peculiar hydrogeochemical conditions within th
 e aquifer. Recently\, to obtain information about hydrodynamic aspects of 
 the natural drainage and an updated hydrodynamic setup of groundwater flow
  related to recharge mechanisms\, the structural characterisation of both 
 surface and tunnels has been carried out\, integrating hydrogeochemical an
 d isotopic data from 27 drainage points along the tunnels.\nThe study reve
 als a complex mix of recharge mechanisms influenced by fractures and litho
 logy permeability. Major ions show minimal variation\, while isotopic resu
 lts identify four distinct flowpaths. These include fast infiltration via 
 fault zones\, the arrival of old water into the tunnel drainage\, represen
 ting the slow-flow aliquot\, interaction with Quaternary deposits\, and ra
 pid groundwater movement through karst systems. The findings also highligh
 t the role of Campo Imperatore's endorheic basin and fault zones in ground
 water recharge dynamics. The Gran Sasso aquifer can be used as a model for
  understanding fractured-karst systems under climatic and tectonic conditi
 ons similar to those in the Mediterranean\, offering insights into strateg
 ies for conserving high-quality drinking water in the context of climate c
 hange and anthropogenic pressure
DTSTAMP:20260427T190649Z
LOCATION:Room R3
SUMMARY:Hydrogeological Dynamics and Sustainable Management of Fractured an
 d Karstified Aquifers: The Gran Sasso Case Study (Italy) - Marco Petitta
URL:https://talks.staging.osgeo.org/flowpath-2025/talk/8KEUQS/
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