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In this work, we present an integration of electrical and seismic data for the characterization of a coastal aquifer prone to saline intrusion. The main goal is to achieve a near-surface reconstruction of the unconsolidated lithotypes (mainly sands) and to image lateral transition of the hydrogeological parameters as saturation or permeability.
To this end we select two areas within the Circeo National Park (Central Italy), where we combine electrical resistivity tomography (ERT) and time-domain induced polarization (TDIP) and multichannel analysis of surface waves (MASW) at site A and ERT and seismic refraction tomography (SRT) at site B.
Through inversion of ERT/TDIP data for Cole-Cole parameters at site A, we achieve a first-approximation prediction of the permeability, to be used for rapid hydro-geophysical screening of the coastal areas. On the other hand, the joint inversion of ERT and SRT data at site B allows to discern a lateral transition likely related to a variation of the groundwater level.