The Role of Faults in Groundwater Circulation before and after Seismic Events: Insights from Tracers, Water Isotopes and Geochemistry

The interaction between fluids and tectonic structures such as fault systems is a much-discussed issue. Many scientific works are aimed at understanding what the role of in displacement deep is, by investigating upper mantle, lower crustal portion upraising gasses carried liquids. other try to explore recharge processes, i.e., precipitation, zones, aiming recognize function abovementioned their capability direct groundwater flow towards preferential drainage areas. Understanding faults processes punctual linear springs, meant gaining streams, key point hydrogeology, it known that can act either barriers or paths. In this work an investigation system located Nera River catchment (Italy), based on geo-structural investigations, tracer tests, geochemical isotopic modelling, allows identify normal before after 2016–2017 central Italy seismic sequence (Mmax = 6.5). outcome was achieved integrated approach consisting structural geology field work, combined with GIS-based analysis, hydrogeological artificial tests analyses.