BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//pretalx//talks.staging.osgeo.org//flowpath-2025//speaker//XVVPJ9
BEGIN:VTIMEZONE
TZID:CET
BEGIN:STANDARD
DTSTART:20001029T040000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:CET
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:20000326T030000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=3
TZNAME:CEST
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
UID:pretalx-flowpath-2025-PFFWC7@talks.staging.osgeo.org
DTSTART;TZID=CET:20250612T135000
DTEND;TZID=CET:20250612T140000
DESCRIPTION:This study investigates the critical issue of salinity intrusio
 n within the Muravera coastal plain aquifer\, located in Sardinia (SW)\, I
 taly\, through a comprehensive hydrogeological investigation. An integrate
 d approach\, combining groundwater dating techniques\, multi-isotope analy
 sis (including ³H\, He\, CFCs\, SF6\, noble gases\, Sr\, and B)\, and tra
 ditional hydrogeological monitoring\, was employed to delineate distinct r
 echarge sources and groundwater flow paths. To mitigate errors associated 
 with seawater mixing\, age tracer and noble gas concentrations were calcul
 ated specifically for the freshwater fraction\, utilizing estimated concen
 trations for the saltwater component of each sample. Freshwater component 
 concentrations were derived through saltwater component estimations\, and 
 subsequent analysis using PANGA and TracerLPM software\, assuming a bimoda
 l mixing model\, yielded noble gas-derived recharge parameters and mean fr
 eshwater ages\, respectively. The combined tracer results revealed that se
 veral samples were influenced by a geogenic source of SF6 (potentially flu
 orite mineralization) and possible CFC contamination introduced during sam
 pling. Furthermore\, reliable ³H/³He ages could not be determined due to
  elevated terrigenic helium concentrations and/or apparent loss of tritiog
 enic ³He for undetermined reasons. Despite these challenges\, the age tra
 cers still provided valuable insights. The study identified four distinct 
 recharge sources\, including the previously uncharacterized Flumini Uri Ri
 ver\, which was found to be a significant contributor. Analysis of the pre
 modern seawater component revealed a high terrigenic helium-4 concentratio
 n\, exceeding 4 x 10⁻⁷ ccSTP/g\, consistent with groundwater ages exce
 eding 1000 years\, indicating extensive mixing with modern freshwater. The
 se findings offer crucial information for developing sustainable water res
 ource management strategies within this vulnerable coastal aquifer.
DTSTAMP:20260426T123628Z
LOCATION:Room R3
SUMMARY:The use of groundwater dating and isotopic analysis to characterize
  a coastal aquifer affected by saline intrusion - Chiara Porru
URL:https://talks.staging.osgeo.org/flowpath-2025/talk/PFFWC7/
END:VEVENT
END:VCALENDAR