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Submarine wastewater discharges: dispersion modeling in the Northern Adriatic sea (Articolo in rivista)
- Type
- Label
- Submarine wastewater discharges: dispersion modeling in the Northern Adriatic sea (Articolo in rivista) (literal)
- Anno
- 2010-01-01T00:00:00+01:00 (literal)
- Alternative label
Scroccaro, I. 1, M. Ostoich 2, G. Umgiesser 3, F. De Pascalis 3, L. Colugnati 1, G. Mattassi 1, M. Vazzoler 2 and M. Cuomo 4 (2010)
Submarine wastewater discharges: dispersion modeling in the Northern Adriatic sea
in Environmental science and pollution research international
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Scroccaro, I. 1, M. Ostoich 2, G. Umgiesser 3, F. De Pascalis 3, L. Colugnati 1, G. Mattassi 1, M. Vazzoler 2 and M. Cuomo 4 (literal)
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- Rivista
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1 Water Protection Department, ARPA FVG (Friuli Venezia-Giulia Regional Protection Agency), Via Cairoli 14, 33057 Palmanova (UD), Italy
2 ARPAV (Veneto Regional Prevention and Protection Agency), 30171 Mestre-Venice, Italy
3 CNR-ISMAR, Castello 1364/A, 30122 Venice, Italy
4 VERITAS, Wastewater Treatment Plants Management, 30171 Porto Marghera, Venice, Italy (literal)
- Titolo
- Submarine wastewater discharges: dispersion modeling in the Northern Adriatic sea (literal)
- Abstract
- Background, aim and scope Opposite interests must
coexist in coastal areas: the presence of significant cities
and urban centres, of touristic and recreational areas, and of
extensive shellfish farming. To avoid local pollution caused
by treated wastewaters along the Northern Adriatic coast
(Friuli Venezia-Giulia and Veneto regions), marine outfall
systems have been constructed. In this study, the application
of a numerical dispersion model is used to support the
traditional monitoring methods in order to link information
concerning the hydrodynamic circulation and the microbiological
features, to evaluate possible health risks associated
with recreational and coastal shellfish farming activities. The
study is a preliminary analysis of the environmental impact of
wastewater treatment plants (WWTPs) with submarine
discharge outfalls. It also could be useful for the water profile
definition according to the Directive 2006/7/EC on the quality
of bathing water and for the integrated areal analysis (Ostoich
et al. 2006), to define the area of influence of each submarine
discharge point.
Materials and methods Historical data on discharges of the
considered WWTPs were recovered and evaluated. Data on
discharges' control for Veneto region (WWTPs of Lido and
Cavallino) were produced by the WWTPs' manager Veritas
Laboratory service, while data for the WWTPs of Friuli
Venezia-Giulia region were produced by the regional
environmental protection agency in the institutional control
activity following official methods. The hydrodynamic
model used in this work is the three-dimensional version
of the finite element model SHYFEM, developed at
ISMAR-CNR (Marine Science Institute of the Italian
National Research Council) in Venice (Umgiesser et al. J
Mar Syst 51:123-145, 2008).
Results and discussion Numerical simulations have been
carried out with the 3D version of the finite element model
SHYFEM for 3 months during autumn 2007 to evaluate the
bacterial pollution dispersion along the coasts of Veneto
and Friuli Venezia-Giulia regions, prescribing meteomarine
forcings and concentration values at the points
corresponding to the positions of the submarine outfalls.
Model results show that during autumn 2007 the discharges
of the submarine outfalls of the Venice province seem to
have no impact on the surface water quality, while there are
some visible effects in the Gulf of Trieste. This reflects the
behaviour of the experimental data collected by ARPAV
and ARPA FVG and monitoring campaigns both on water
and shellfish quality. Further results have been elaborated to
identify the area of influence of each discharge point;
scenarios were developed with imposed concentrations.
The results seem to highlight that the two discharges of the
Veneto region are not noticeable, while the discharges of
the Gulf of Trieste (in particular the Servola and Barcola
ones) are perceptible.
Conclusions This study represents a new step towards
the study of the microbiological pollution dispersion and
impact due to the discharges of the submarine outfalls of
the Veneto and Friuli Venezia-Giulia regions (nine
considered discharge points). With the 3D version of
the finite element model SHYFEM, the information
obtained from the hydrodynamic circulation has been
linked to the classical methods of analysis, to assess
possible risks connected to the microbiological parameter
Escherichia coli.
Recommendations and perspectives In future studies the
time scale for microbiological parameters' decay could be
linked to various environmental parameters such as light
climate, temperature, and salinity. Interesting information
would come from the study of new scenarios with different
configurations of the discharge of the pipelines and/or the
treatment plants and in particular from the improvements of
the 3D version of the SHYFEM model, to take the
stratification process into account which occurs during
spring-summer, since the Northern Adriatic Sea is a very
complex ecosystem, both as physical and ecological
processes. (literal)
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