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Seasonal Distribution 224Radium Activities in the Venice Laggon as a proxy for groundwater discharge (Abstract/Comunicazione in atti di convegno)
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- Label
- Seasonal Distribution 224Radium Activities in the Venice Laggon as a proxy for groundwater discharge (Abstract/Comunicazione in atti di convegno) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Alternative label
E. Garcia-Solsona (1), J, Rapaglia (2), J. Garcia-Orellana (1) L. Zaggia (3), P. Masque-Barri (1), A. Beck (2), M. Ferla (4), K. Cochran (2), H.E. Bokuniewicz (2) (2007)
Seasonal Distribution 224Radium Activities in the Venice Laggon as a proxy for groundwater discharge
in 32nd Congress of IAHR, The International Association of Hydraulic Engineering & Research, Venice, 1-6/07/2007
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- E. Garcia-Solsona (1), J, Rapaglia (2), J. Garcia-Orellana (1) L. Zaggia (3), P. Masque-Barri (1), A. Beck (2), M. Ferla (4), K. Cochran (2), H.E. Bokuniewicz (2) (literal)
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- 32nd Congress of IAHR, The International Association of Hydraulic Engineering and Research - Abstracts (literal)
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- 1) Institut de Ciència i Tecnologia Ambientals, Universitat Autònoma de Barcelona (ICTA-UAB), Bellaterra, Spain
2) Marine Sciences Research Center, State University of New York at Stony Brook, Stony Brook, NY 11794, USA
3) Consiglio Nazionale delle Ricerche, Istituto di Scienze Marine (CNR-ISMAR) Venice, Italy
4) Agenzia per la Protezione Ambientale ed i Servizi Tecnici (APAT), S. Polo 50, Venice 30125, Italy (literal)
- Titolo
- Seasonal Distribution 224Radium Activities in the Venice Laggon as a proxy for groundwater discharge (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
- Abstract
- The activities of 224Ra isotope were measured in 30 pre-determined locations
within the Venice Lagoon, Italy, during different seasons. These surveys were
performed in order to determine both seasonal variation and average annual activity
within the lagoon. The first survey was completed in the surnrner of2005, the other two
surveys were accomplished in the fall of 2006 and winter of 2007. End-member
samples were also collected in the Adriatic Sea and a couple of rivers. The
concentration of 224Ra in the pore water is often 2 orders of magnitude higher than its
subsequent concentration in the open sea. We hence utilize the measured activities of
radium to determine both the relative magnitude and location of the groundwater
discharging into the Venice Lagoon. In addition point measurements of discharge using
vented benthic chambers were taken in several locations during the sampling period in
order to corroborate the radium measurements.
Both integrated and point measurements display a large discharge of
groundwater occurring in the northern lagoon as well as certain places in the southern
area. The local discharge may vary with time though the general pattern does not
display significant change between seasons. Though most of the discharge is likely to
be recirculated salt water of varying origins, previous data show that this discharge is of
a very large volume as compared to the fluvial discharge (as much as 20 fold greater).
The zone where groundwater mixes with salt water has been likened to
processes occurring in an estuary, and here many important chernic!ll reactions can take
place. In addition, groundwater is often elevated in the concentration of contaminants so
its discharge to the lagoon can be a major source of contamination. (literal)
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