As part of the implementation of the European Directive on bathing water (2006/7/EC), the City of Marseille awarded SERAM (Lyonnaise des Eaux) the development of vulnerability profiles of the 21 bathing areas of its coastline.
Lyonnaise des Eaux (Rivages PRO TECH)
Bathing water, wastewater, sewer network, Marseille, vulnerability profiles, quality of receiving waters, surveillance, coastline, effluents discharge
As part of the implementation of the European Directive on bathing water (2006/7/EC), the City of Marseille awarded SERAM (Lyonnaise des Eaux) the development of vulnerability profiles of the 21 bathing areas of its coastline, including:
- A vulnerability assessment and identification of hazards
- A statistical analysis of surveillance data
- modeling of the quality of bathing water, enabling the future development of a predictive tool for risk of beach closures to the public
- a risk assessment of alga proliferation
- the proposal of an action plan (remedial measures and procedures for active management of effluents)
SERAM, carried out the diagnosis of all sea outlets sewer networks, thus establishing the vulnerability of each beach towards spill or runoff pollution.
The sewer network has been equipped with real time remote control facilities. When a discharge is detected, the local authorities responsible for authorising swimming and informing the public are immediately alerted. In the case of suspected pollution, the beaches concerned are closed as a precaution and samples are taken immediately. A rapid technical analysis is carried out in order to determine the quality of the water so as to either re-open the beaches as soon as possible or renew sample testing if the results are not good.
This 24h/24 surveillance of the sewer network and of the risk of rain through radar images as well as a network of rain gauges ensures effective prevention of coastal water pollution.
These actions resulted in a significant improvement of the bacteriological quality of bathing water on the beaches of Marseille.
City of Marseille, in the South of France
For several years the city of Marseille, and now the Marseille Provence Métropole Urban Community, has undertaken an ambitious program to protect bathing waters against pollution that could come from the sewer and stormwater networks.
In order to implement this program, the city has mobilized the wastewater operator, Lyonnaise des Eaux (through the local subsidiary SERAM and Rivages PRO TECH).
Partners are also involved: Paul Ricard Institute, University of Aix Marseille II, IFREMER, SAFEGE
SERAM established the vulnerability profiles of the 21 bathing areas of Marseille and is now in the process of proposing an action plan for active effluent management.
The city of Marseille has the largest urban resort area in France: 21 beaches along 50 km of coastline. Guarantee the high quality of bathing water is an ambitious challenge in view of the immediate proximity of beaches and discharges from the sewer networks and port and shipping activities.
The actions already carried out resulted in a significant improvement of the bacteriological quality of bathing water on the beaches of Marseille.
To judge the proficiency of the sewer network, SERAM ensures that there is no beach closure due to sewage in dry weather and / or in case of malfunction of the network, that ‘there is a precautionary closure of beach. For this, a specific indicator has been set up.
This methodology is replicable for all cities located in coastal areas
These actions were greatly facilitated by the knowledge by Lyonnaise des Eaux of the operation of sewer network in Marseilles, operated by its subsidiary SERAM
Rivages PRO TECH already performs similar services in Biarritz, Vias, Libourne, Villeneuve Loubet, Bouzigues. In Basque Country, it works with coastal communities on the development of a management system predictive of the quality of bathing water, along the establishment of a certification standard in the quality of bathing water.
Ville de Marseille : http://www.marseille.fr/sitevdm/environnement/mesures-qualites/eaux-de-baignade
Lyonnaise des Eaux (Rivages PRO TECH) : email@example.com