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| Titel |
Modelling microbiological water quality in the Seine river drainage network: past, present and future situations |
| VerfasserIn |
P. Servais, G. Billen, A. Goncalves, T. Garcia-Armisen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 11, no. 5 ; Nr. 11, no. 5 (2007-09-26), S.1581-1592 |
| Datensatznummer |
250009469
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| Publikation (Nr.) |
 copernicus.org/hess-11-1581-2007.pdf |
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| Zusammenfassung |
| The Seine river watershed is characterized by a high population density and
intense agricultural activities. Data show low microbiological water quality
in the main rivers (Seine, Marne, Oise) of the watershed. Today, there is an
increasing pressure from different social groups to restore microbiological
water quality in order to both increase the safety of drinking water
production and to restore the possible use of these rivers for bathing and
rowing activities, as they were in the past. A model, appended to the
hydro-ecological SENEQUE/Riverstrahler model describing the functioning of
large river systems, was developed to describe the dynamics of faecal
coliforms (FC), the most usual faecal contamination indicator. The model is
able to calculate the distribution of FC concentrations in the whole
drainage network resulting from land use and wastewater management in the
watershed. The model was validated by comparing calculated FC concentrations
with available field data for some well-documented situations in different
river stretches of the Seine drainage network. Once validated, the model was
used to test various predictive scenarios, as, for example, the impact of
the modifications in wastewater treatment planned at the 2012 horizon in the
Seine watershed in the scope of the implementation of the european water
framework directive. The model was also used to investigate past situations.
In particular, the variations of the microbiological water quality in the
Parisian area due to population increase and modifications in wastewater
management were estimated over the last century. It was shown that the
present standards for bathing and other aquatic recreational activities are
not met in the large tributaries upstream from Paris since the middle of the
1950's, and at least since the middle of the XIXth century in the main
branch of the Seine river downstream from Paris. Efforts carried out for
improving urban wastewater treatment in terms or organic matter and nutrient
loading resulted in a sensible reduction of microbiological contamination,
but were not specific enough toward bacteriological contamination for
achieving the objective of restoring levels compatible with bathing
activities in the Parisian area. |
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