Grand Morin River upstream of the Paris urban area and in the Seine River
downstream of Paris urban area and downstream of the largest discharge point of
wastewater occurring through the effluents of the Seine-Aval WWTP at Achères
(Fig. 1).
Monthly monitoring was carried out over a 1-year period upstream and downstream of the Paris agglomeration in order to highlight the impact of the urban
discharges on the DOM of the Seine River in terms of both quality and quantity [29].
There were nine sampling campaigns from October 2010 to September 2011, and
three sites were sampled:
– Ussy-sur-Marne (labelled “Upstream I”; open blue circle on Marne River in
Fig. 1) and Fontaine-le-Port (labelled “Upstream II”; open blue circle on Seine
River upstream Paris in Fig. 1) are located upstream of the conurbation on the
Marne and Seine Rivers, respectively. Due to the low population density in
their catchment, these two sites were chosen as reference sites given that they
were exposed to a low impact from urban discharges.
– Andresy (labelled “Downstream”; open blue circle on Seine River downstream
Paris in Fig. 1) is located downstream of Paris approximately 9 km from the
Seine-Aval WWTP outlet, ensuring a good level of mixing in Seine River water.
This site was selected as being under high urban pressure.
Fig. 1 Location of the different sampling sites in the Seine River and its main tributaries: the Oise
River, the Marne River and the Grand Morin River. Filled circles, snapshot campaigns; open blue
circles, monthly campaigns upstream and downstream from the Paris conurbation
Aquatic Organic Matter in the Seine Basin: Sources, Spatio-Temporal. . .
221
downstream of Paris urban area and downstream of the largest discharge point of
wastewater occurring through the effluents of the Seine-Aval WWTP at Achères
(Fig. 1).
Monthly monitoring was carried out over a 1-year period upstream and downstream of the Paris agglomeration in order to highlight the impact of the urban
discharges on the DOM of the Seine River in terms of both quality and quantity [29].
There were nine sampling campaigns from October 2010 to September 2011, and
three sites were sampled:
– Ussy-sur-Marne (labelled “Upstream I”; open blue circle on Marne River in
Fig. 1) and Fontaine-le-Port (labelled “Upstream II”; open blue circle on Seine
River upstream Paris in Fig. 1) are located upstream of the conurbation on the
Marne and Seine Rivers, respectively. Due to the low population density in
their catchment, these two sites were chosen as reference sites given that they
were exposed to a low impact from urban discharges.
– Andresy (labelled “Downstream”; open blue circle on Seine River downstream
Paris in Fig. 1) is located downstream of Paris approximately 9 km from the
Seine-Aval WWTP outlet, ensuring a good level of mixing in Seine River water.
This site was selected as being under high urban pressure.
Fig. 1 Location of the different sampling sites in the Seine River and its main tributaries: the Oise
River, the Marne River and the Grand Morin River. Filled circles, snapshot campaigns; open blue
circles, monthly campaigns upstream and downstream from the Paris conurbation
Aquatic Organic Matter in the Seine Basin: Sources, Spatio-Temporal. . .
221