Publikationsdatum:
2017-04-19
Beschreibung:
Many lakes have been the object of hydraulic
works in historical times, and the drainage tunnel carved by
Romans for regulating the level of Lake Albano (Central
Italy) can be considered as one of the most important
historical hydraulic tunnels in the world. We sampled and
analysed lake water, as well as groundwater samples from
the Lake Albano emissary and another hydraulic work in
the area (Ninfeo), which were analysed for their geochemical
and isotopic composition in order to extract
useful information for a possible reuse of the tunnel for
anthropogenic purposes. The collected water samples
exhibit common chemical features, typical of water–rock
interaction processes in volcanic areas. Analyses of minor
and trace elements confirmed the abovementioned results,
indicating the presence of an atmospheric pollution source
for heavy metals, although their concentrations are mostly
below the Maximum Admitted Concentrations for drinking
water issued by the World Health Organization. The
chemical composition of dissolved gases indicated that
both lake and groundwater are mainly enriched in CO2.
Isotopic analyses suggested a clear volcanic origin for CO2
dissolved in lake water, while carbon dioxide in groundwater
from the Roman emissary is produced by soil respiration.
As further confirmed by Oxygen and Deuterium
isotopic composition, the Roman emissary drains local
suspended aquifers neither in contact with the lake water body nor influenced by volcanic activity, suggesting the opportunity to use the tunnel as a ‘‘zero-condition’’ monitoring
site for individuating a possible future renewal of
volcanic activity.
Beschreibung:
Published
Beschreibung:
289
Beschreibung:
6A. Geochimica per l'ambiente
Beschreibung:
JCR Journal
Schlagwort(e):
Hydrochemistry
;
Isotopes
;
Lacustrine environment
;
Drainage tunnel
;
Volcano monitoring
;
04.08. Volcanology
Repository-Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Materialart:
article
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