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- Title
Hydrogeological and Geochemical Characteristics of the Coastal Aquifer of Stromboli Volcanic Island (Italy).
- Authors
Madonia, Paolo; Campilongo, Gloria; Cangemi, Marianna; Carapezza, Maria Luisa; Inguaggiato, Salvatore; Ranaldi, Massimo; Vita, Fabio; Huneau, Frédéric
- Abstract
Although groundwater is a strategic source in volcanic islands, most hydrogeochemical research on this topic has been focused on volcanic activity monitoring, overlooking general hydrogeological aspects. The same applies to one of the most studied volcanoes in the world, Stromboli Island (Italy). Here, we provide a hydrogeological scheme of its coastal aquifer, retrieving inferences about its potential use as a water supply source and for optimizing monitoring protocols for volcanic surveillance. Starting from the hydrogeochemical literature background, we analyzed new data, acquired both for volcano monitoring purposes and during specific surveys. Among these, there were saturated hydraulic conductivity measurements of selected rock samples and precise determinations of water table elevations based on GNSS surveys of wells. We identified a ubiquitous thin lens of brackish water floating on seawater and composed of a variable mixing of marine and meteoric components; inlets of hydrothermal fluids to the aquifer are basically gases, mainly CO2. Based on its hydrogeochemical character, the coastal aquifer of Stromboli could be used as a water supply source after desalinization by reverse osmosis, while the wells located far from the seashore are the most interesting for volcano monitoring, because they are less disturbed by the shallow geochemical noise.
- Subjects
ITALY; HYDROGEOLOGY; AQUIFERS; SALTWATER encroachment; HYDRAULIC measurements; WATER supply; HYDRAULIC conductivity; ISLANDS; AQUIFER pollution
- Publication
Water (20734441), 2021, Vol 13, Issue 4, p417
- ISSN
2073-4441
- Publication type
Article
- DOI
10.3390/w13040417