1,720,975 research outputs found
Groundwater fluxes into a submerged sinkhole area, Central Italy, using radon and water chemistry
No full textThe groundwater contribution into Green Lake and Black Lake (Vescovo Lakes Group), two cover collapse sinkholes
in Pontina Plain (Central Italy), was estimated using water chemistry and a 222Rn budget. These data can constrain
the interactions between sinkholes and deep seated fluid circulation, with a special focus on the possibility of
the bedrock karst aquifer feeding the lake. The Rn budget accounted for all quantifiable surface and subsurface input
and output fluxes including the flux across the sediment–water interface. The total value of groundwater discharge into
Green Lake and Black Lake (540 ± 160 L s1) obtained from the Rn budget is lower than, but comparable with historical
data on the springs group discharge estimated in the same period of the year (800 ± 90 L s1). Besides being an
indirect test for the reliability of the Rn-budget ‘‘tool’’, it confirms that both Green and Black Lake are effectively
springs and not simply ‘‘water filled’’ sinkholes. New data on the water chemistry and the groundwater fluxes into
the sinkhole area of Vescovo Lakes allows the assessment of the mechanism responsible for sinkhole formation in Pontina
Plain and suggests the necessity of monitoring the changes of physical and chemical parameters of groundwater
below the plain in order to mitigate the associated ris
Una nuova potenzialità per la datazione di travertini Olocenici non idrotermali: la misura del 226Ra
No full text
Lo studio degli spring-sinkhole del gruppo dei Laghi del Vescovo (pianura Pontina) attraverso l’uso del radon badget
No full textGroundwater fluxes into a submerged sinkhole
area, Central Italy, using radon and water chemistry
The groundwater contribution into Green Lake and
Black Lake (Vescovo Lakes Group), two cover collapse sinkholes
in Pontina Plain (Central Italy), was estimated
using water chemistry and a 222Rn budget. These data can constrain
the interactions between sinkholes and deep
seated fluid circulation, with a special focus on the possibility of
the bedrock karst aquifer feeding the lake. The
Rn budget accounted for all quantifiable surface and subsurface input
and output fluxes including the flux across the
sediment-water interface. The total value of groundwater discharge into
Green Lake and Black Lake (540 ± 160 L s1)
obtained from the Rn budget is lower than, but comparable with historical
data on the springs group discharge estimated in
the same period of the year (800 ± 90 L s-1). Besides being an
indirect test for the reliability of the
Rn-budget ''tool'', it confirms that both Green and Black Lake are effectively
springs and not simply ''water filled''
sinkholes. New data on the water chemistry and the groundwater fluxes into
the sinkhole area of Vescovo Lakes allows the
assessment of the mechanism responsible for sinkhole formation in Pontina
Plain and suggests the necessity of monitoring
the changes of physical and chemical parameters of groundwater
below the plain in order to mitigate the associated ris
Isotopic chronology of travertine deposition in middle Velino valley (Rieti, Italy) during the Late Quaternary.
No full textU/Th dating of freshwater travertine from Middle velino Valley (Central Italy): geological and paleoclimatic implications
No full textSix travertine bodies outcropping along the Middle Velino Valley (Central Italy) have been studied and dated
using the U/Th method in order to obtain new chronological constraints for the recent geological evolution of the
area. The lithological and sedimentological characteristics of travertines have been described,showing that such
deposits can be referred to waterfall,pool terraces and gentle slopes environment. Travertines have formed during
warm periods and can be referred to marine oxygen isotope stages 5,3 and 1. Travertine deposition seems to stop
around 5 ka BP according to other European and Italian sites. Pollen stratigraphy and ostracod assemblages from the
close sequence of Valle di Castiglione,characterized by the same climatic conditions of Velino Valley, have confirmed
that periods of Velino Valley travertine deposition were effectively characterized by warm and wet climatic conditions.
Seismic activity strongly active in the area since the Middle Pleistocene has deeply influenced the location and the
discharge of springs which have deposited the travertines,influencing in turn the shape and size of travertine
bodies
U-series disequilibria and magma melting processes at Vulcano Island (Italy): the case of Monte Luccia
No full textGroundwater fluxes into a submerged sinkhole area, central Italy, using radon and water chemistry
No full textThe groundwater contribution into Green Lake and
Black Lake (Vescovo Lakes Group), two cover collapse sinkholes
in Pontina Plain (Central Italy), was estimated
using water chemistry and a 222Rn budget. These data can constrain
the interactions between sinkholes and deep
seated fluid circulation, with a special focus on the possibility of
the bedrock karst aquifer feeding the lake. The
Rn budget accounted for all quantifiable surface and subsurface input
and output fluxes including the flux across the
sediment-water interface. The total value of groundwater discharge into
Green Lake and Black Lake (540 ± 160 L s1)
obtained from the Rn budget is lower than, but comparable with historical
data on the springs group discharge estimated in
the same period of the year (800 ± 90 L s-1). Besides being an
indirect test for the reliability of the
Rn-budget ''tool'', it confirms that both Green and Black Lake are effectively
springs and not simply ''water filled''
sinkholes. New data on the water chemistry and the groundwater fluxes into
the sinkhole area of Vescovo Lakes allows the
assessment of the mechanism responsible for sinkhole formation in Pontina
Plain and suggests the necessity of monitoring
the changes of physical and chemical parameters of groundwater
below the plain in order to mitigate the associated ris
Studio geocronologico e isotopico dei prodotti eruttivi dell'isola di Vulcano, basato sui metodi dei disequilibri radioattivi della serie dell'uranio. Nuovi dati
No full textIsotopic chronology of travertine deposition in middle Velino valley (Rieti, Italy) during the late quaternary
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