Hydrogeological and hydrogeochemical study of a volcanic-sedimentary coastal aquifer in the archaeological site of Cumae (Phlegraean Fields, southern Italy)
| Autor: | Luciano Ferrara, Michele Arienzo, Olga Mangoni, Vincenzo Allocca, Pantaleone De Vita, Silvio Coda, Brunella Di Rienzo, Luisa Stellato, Antonella Giarra, Marco Trifuoggi |
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| Přispěvatelé: | Allocca, Vincenzo, Coda, Silvio, DE VITA, Pantaleone, Brunella Di Rienzo, Ferrara, Luciano, Giarra, Antonella, Mangoni, Olga, Luisa, Stellato, Trifuoggi, Marco, Arienzo, Michele |
| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category Hydrogeology 010504 meteorology & atmospheric sciences Groundwater flow Outcrop Aquifer Weathering 010501 environmental sciences 01 natural sciences Archaeology Waves and shallow water Geochemistry and Petrology Economic Geology Sedimentary rock Archaeological ruins Hydrogeology Hydrogeochemistry 222Rn Volcanic-sedimentary coastline aquifer Cumae archaeological site Geology Groundwater 0105 earth and related environmental sciences |
| Zdroj: | Journal of Geochemical Exploration. 185:105-115 |
| ISSN: | 0375-6742 |
| Popis: | A hydrogeological and hydrogeochemical survey in the Cumae archaeological site (Phlegraean Fields, southern Italy) together with radon levels determination in groundwater have been carried out. The study was motivated by the fact that the site is often submerged by the outcrop of groundwater, threatening the integrity of ruins, and hence by the need to preserve such important archaeological park. The hydrostratigraphic and hydrogeological data revealed the presence of a multi-layered aquifer system, formed by a shallow unconfined and a deep semiconfined aquifer. The groundwater flow appeared to be strongly influenced by vertical and lateral lithological heterogeneity of volcanic-sedimentary deposits, as well as by groundwater pumping and drainage by surface micro-channel system. The dominant hydrochemical facies were Cl−-SO42 −-Na+-K+, HCO3−-Ca2 +-Mg2 + and HCO3− Na+-K+ types. These facies were affected by: i) dissolution and chemical weathering, ion exchange with volcanic-sedimentary deposits, ii) localized rise along faults and fractured zones of deep magmatic fluids highly mineralized, with outstanding levels of F−, 6.4 mg L− 1 in deep water and 3.3 mg L− 1 in shallow water, and 222Rn, 31,500 Bq m− 3 in deep water and 5400 Bq m− 3 in shallow water; iii) freshwater-saltwater interactions, induced by groundwater pumping. |
| Databáze: | OpenAIRE |
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