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UID:pretalx-flowpath-2025-SYGLJN@talks.staging.osgeo.org
DTSTART;TZID=CET:20250611T101000
DTEND;TZID=CET:20250611T102000
DESCRIPTION:Seawater intrusion into coastal aquifers is a growing global co
 ncern\, driven by climate change\, sea-level rise\, and intensive groundwa
 ter exploitation. Effective assessment and monitoring strategies are cruci
 al for sustainable water resource management. Traditional hydrogeological 
 investigations\, such as borehole measurements\, provide point-source data
  but lack the spatial resolution necessary for comprehensive regional asse
 ssments. Geophysical techniques\, in particular Electrical Resistivity Tom
 ography (ERT) and Frequency Domain Electromagnetics (FDEM)\, offer non-inv
 asive alternatives with distinct advantages and limitations.\nThis study p
 resents a comparative evaluation of ERT and FDEM techniques for mapping sh
 allow seawater intrusion at four test sites along the northern coastal mar
 gin of Friuli Venezia Giulia\, Italy\, each with different salinity levels
 \, lithological conditions\, and seasonal variations. ERT surveys provided
  high-resolution subsurface conductivity data\, used as the reference data
 set. The FDEM measurements were carried out using two different instrument
 s: a multi-depth\, constant-frequency system and a single-offset\, multi-f
 requency system\, both of which allow rapid and extensive data acquisition
 .\nTo ensure robust comparability\, FDEM-derived apparent electrical condu
 ctivity (ECa) values were normalized against ERT-derived conductivity data
 . The results indicate that\, despite its rapid acquisition capabilities\,
  FDEM can provide reliable estimates of subsurface conductivity without si
 te-specific calibration\, using appropriate data normalization techniques.
 \nThis research underscores the potential of FDEM as a cost-effective and 
 scalable solution for monitoring seawater intrusion\, providing valuable i
 nsights into groundwater salinization dynamics and advancing methodologies
  for large-scale environmental and water resource management.
DTSTAMP:20260427T072944Z
LOCATION:Room R3
SUMMARY:Comparison of electrical resistivity tomography and frequency domai
 n electromagnetic methods for mapping seawater intrusion in shallow aquife
 rs - Benedetta Surian
URL:https://talks.staging.osgeo.org/flowpath-2025/talk/SYGLJN/
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